Driving roller, sintering device and solar cell manufacturing production line

Abstract

The utility model relates to a driving roller, a sintering device and a solar cell manufacturing production line. The transmission roller comprises a roller body and a roller wheel, the roller body comprises installation sections and middle sections, every two adjacent installation sections are connected through the corresponding middle section, the peripheral side face of each middle section shrinks inwards relative to the peripheral side face of the installation section adjacent to the middle section to form a receding part, and the roller wheel is fixedly arranged at the end, close to the corresponding middle section, of each installation section in a sleeving mode. And the two adjacent rollers arranged on the two adjacent mounting sections are matched for conveying battery pieces. According to the transmission roller, the sintering device and the solar cell manufacturing production line, the reject ratio of the cell pieces can be reduced.

Description

Technical Field

[0001] This application relates to the field of solar cell manufacturing technology, specifically to a transmission roller, a sintering device, and a solar cell manufacturing production line. Background Technology

[0002] During the manufacturing process of solar cells, sintering equipment (such as ceramic sintering furnaces or chain sintering furnaces) is used to sinter the cells. During sintering, the cells are prone to heat deformation and come into contact with the rollers that transport them, resulting in scratches or marks on the cells and increasing the defect rate. Utility Model Content

[0003] Therefore, it is necessary to provide a drive roller, sintering device, and solar cell manufacturing production line that can reduce the defect rate of solar cells, in order to address the above problems.

[0004] A drive roller includes a roller body and a roller wheel. The roller body includes an installation section and an intermediate section. Each pair of adjacent installation sections are connected by the intermediate section. The outer peripheral side of the intermediate section is recessed relative to the outer peripheral side of the adjacent installation section to form a clearance portion. The roller wheel is sleeved and fixed to one end of the installation section near the intermediate section. Two roller wheels arranged adjacently on two adjacent installation sections cooperate to transport battery cells.

[0005] In some embodiments, the outer peripheral side of the intermediate section is recessed by a dimension L relative to the outer peripheral side of the mounting section, where 2.9mm ≤ L ≤ 3.1mm.

[0006] In some embodiments, the roller body further includes a transition section connected between the mounting section and the intermediate section, and the outer diameter of the transition section gradually increases from the intermediate section to the mounting section.

[0007] In some embodiments, the roller includes a first wheel portion and a second wheel portion connected together, the second wheel portion being disposed on the side of the first wheel portion away from the adjacent intermediate section, and the diameter of the second wheel portion being larger than the diameter of the first wheel portion;

[0008] The first wheel portion of two adjacent rollers arranged on two adjacent mounting sections, and the second wheel portion of two adjacent rollers arranged on two adjacent mounting sections, are both used to transport the battery cells.

[0009] In some embodiments, the roller further includes a third wheel portion, which is disposed on the side of the second wheel portion opposite to the first wheel portion and connected to the second wheel portion, wherein the diameter of the third wheel portion is larger than the diameter of the second wheel portion;

[0010] The third wheel portion of two adjacent rollers arranged on two adjacent mounting sections cooperates to limit the battery cell.

[0011] In some embodiments, the transmission roller further includes a threaded fastener, and the mounting section and the third wheel section are respectively provided with a first threaded hole and a second threaded hole. The threaded fastener passes through the first threaded hole and the second threaded hole and is threadedly connected to the first threaded hole and the second threaded hole.

[0012] In some embodiments, the portion of the threaded fastener that passes through the second threaded hole is entirely located within the second threaded hole.

[0013] In some embodiments, both the roller body and the roller wheel are ceramic components.

[0014] A sintering apparatus, comprising:

[0015] The sintered body has sintering channels inside; and

[0016] As described in any of the above embodiments, there are multiple drive rollers arranged along the extension direction of the sintering channel, and all the drive rollers cooperate to transport the battery cells.

[0017] A solar cell manufacturing production line includes a sintering apparatus as described in the above embodiments.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] The aforementioned drive roller, sintering device, and solar cell manufacturing production line, in this application, by designing the outer peripheral side of the intermediate section to be recessed relative to the outer peripheral side of the adjacent mounting section to form a clearance portion, increases the distance between the solar cell and the outer peripheral side of the intermediate section. In this way, the solar cell and the outer peripheral side of the intermediate section can maintain a certain safe distance. After the solar cell undergoes thermal deformation, the risk of it contacting the outer peripheral side of the intermediate section and causing scratches or marks is reduced, thereby reducing the defect rate of the solar cell. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the transmission roller in one embodiment of this application.

[0021] Figure 2 for Figure 1 An enlarged schematic diagram of a portion of the transmission roller, shown.

[0022] Icon labels:

[0023] 1. Drive roller;

[0024] 10. Roller body; 20. Roller wheel; 30. Threaded fastener;

[0025] 11. Installation section; 11a. First installation section; 11b. Second installation section; 12. Intermediate section; 13. Transition section;

[0026] 20a, First roller; 20b, Second roller; 21, First wheel section; 22, Second wheel section; 23, Third wheel section; 231, Second threaded hole. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] During the manufacturing process of solar cells, sintering equipment (such as ceramic sintering furnaces or chain sintering furnaces) is used to sinter the cells. During sintering, the cells are prone to heat deformation and come into contact with the rollers that transport them, resulting in scratches or marks on the cells and increasing the defect rate.

[0034] Please see Figure 1 To alleviate the above problems, the applicant, after in-depth research, designed a transmission roller 1. The transmission roller 1 includes a roller body 10 and a roller 20. The roller body 10 includes an installation section 11 and an intermediate section 12. Each pair of adjacent installation sections 11 are connected by the intermediate section 12. The outer peripheral side of the intermediate section 12 is recessed relative to the outer peripheral side of the adjacent installation section 11 to form a clearance part. The roller 20 is sleeved and fixed to the end of the installation section 11 near the intermediate section 12. Two rollers 20 arranged adjacently on two adjacent installation sections 11 cooperate to transport battery cells.

[0035] If the outer peripheral side of the intermediate section 12 is recessed relative to the outer peripheral side of the adjacent mounting section 11, then the diameter of the intermediate section 12 is smaller than the diameter of the mounting section 11.

[0036] Specifically, the total number of mounting segments 11 is one more than the total number of intermediate segments 12, and the number of rollers 20 is the same as the total number of ends of all mounting segments 11 that are near the intermediate segment 12, and they correspond one-to-one. For example, if there are two mounting segments 11 and one intermediate segment 12, with the intermediate segment 12 located between the two mounting segments 11, then in this embodiment, there are two rollers 20, which are respectively fitted onto the first and last mounting segments 11 near the ends of the intermediate segment 12. Another example is if there are three mounting segments 11 and two intermediate segments 12, with the mounting segments 11 and intermediate segments 12 alternating, then in this embodiment, there are four rollers 20, with two rollers 20 respectively located on the first and last mounting segments 11 near the ends of the intermediate segment 12, and the other two rollers 20 located on opposite ends of the middle mounting segment 11.

[0037] Of course, the number of installation section 11, intermediate section 12 and roller 20 is not limited to the two mentioned above, and may also be other numbers, which are not limited here.

[0038] For ease of explanation, the following embodiments will be described using two mounting sections 11 and two rollers 20, with one intermediate section 12. The two mounting sections 11 are defined as the first mounting section 11a and the second mounting section 11b, and the two rollers 20 are defined as the first roller 20a and the second roller 20b. The intermediate section 12 connects the first mounting section 11a and the second mounting section 11b. The first roller 20a is fitted onto the end of the first mounting section 11a near the intermediate section 12, and the second roller 20b is fitted onto the end of the second mounting section 11b near the intermediate section 12.

[0039] In actual operation, the two ends of the battery cell, which are arranged opposite each other along its width direction, are respectively attached to the first roller 20a and the second roller 20b, and are conveyed under the action of the first roller 20a and the second roller 20b.

[0040] In the existing technology, the middle section 12 of the battery cell is a cylindrical rod structure. The distance between the battery cell and the outer peripheral side of the middle section 12 is extremely small. When the battery cell is sintered, the part of the battery cell located in the middle of its two ends is easily deformed by heat and wears or scratches after contacting the outer peripheral side of the middle section 12, resulting in scratches or marks on the battery cell and increasing the defect rate of the battery cell.

[0041] In this application, by designing the outer peripheral side of the intermediate section 12 to be recessed relative to the outer peripheral side of the adjacent mounting section 11 to form a clearance portion, the distance between the battery cell and the outer peripheral side of the intermediate section 12 is increased. In this way, the battery cell and the outer peripheral side of the intermediate section 12 can maintain a certain safe distance. After the battery cell undergoes thermal deformation, the risk of it contacting the outer peripheral side of the intermediate section 12 and causing scratches or marks is reduced, thereby reducing the defect rate of the battery cell.

[0042] In some embodiments, the outer peripheral side of the intermediate section 12 is recessed by a dimension L relative to the outer peripheral side of the mounting section 11, where 2.9 mm ≤ L ≤ 3.1 mm. Within this size range, a safe distance can be maintained between the outer peripheral side of the intermediate section 12 and the battery cell, reducing the risk of scratches or marks caused by the battery cell contacting the outer peripheral side of the intermediate section 12 after thermal deformation. Furthermore, it ensures that the intermediate section 12 has a suitable diameter to maintain good mechanical strength, thereby reducing the risk of deformation of the intermediate section 12.

[0043] In some embodiments, the roller body 10 further includes a transition section 13, which is connected between the mounting section 11 and the intermediate section 12, and the outer diameter of the transition section 13 gradually increases from the intermediate section 12 to the mounting section 11.

[0044] Specifically, the number of transition sections 13 is twice that of intermediate sections 12, and each end of the intermediate section 12 is connected to an adjacent mounting section 11 via a transition section 13. For example, one end of the intermediate section 12 is connected to the first mounting section 11a, and the other end of the intermediate section 12 is connected to the second mounting section 11b via transition sections 13.

[0045] The profile of the longitudinal section of the transition segment 13 can be a concave arc shape, a convex arc shape, or a diagonal shape, which can be set according to the requirements.

[0046] If the mounting section 11 and the intermediate section 12 are directly connected, the large difference in diameter at the connection point can easily cause stress concentration and damage, shortening the service life of the roller body 10. In this embodiment, by providing a transition section 13, the diameter between the intermediate section 12 and the mounting section 11 can be smoothly transitioned, reducing the risk of stress concentration and damage at the connection point and extending the service life of the roller body 10.

[0047] In some embodiments, the roller 20 includes a first wheel portion 21 and a second wheel portion 22 connected together. The second wheel portion 22 is disposed on the side of the first wheel portion 21 facing away from the adjacent intermediate section 12, and the diameter of the second wheel portion 22 is larger than the diameter of the first wheel portion 21. The first wheel portions 21 of two adjacent rollers 20 disposed on two adjacent mounting sections 11 cooperate, and the second wheel portions 22 of two adjacent rollers 20 disposed on two adjacent mounting sections 11 cooperate to transport the battery cells.

[0048] Specifically, in the first roller 20a or the second roller 20b, the second wheel portion 22 is disposed on the side of the first roller 20a facing away from the middle section 12. The first wheel portions 21 of the first roller 20a and the second roller 20b cooperate, and the second wheel portions 22 of the first roller 20a and the second roller 20b cooperate to transport the battery cells.

[0049] The distance between the first wheel portion 21 of the first roller 20a and the second roller 20b is smaller than the distance between the second wheel portion 22 of the first roller 20a and the second roller 20b. Therefore, the first wheel portion 21 of the first roller 20a and the second roller 20b is used to transport narrower battery cells, and the second wheel portion 22 of the first roller 20a and the second roller 20b is used to transport wider battery cells.

[0050] By setting the first wheel section 21 and the second wheel section 22, the two rollers 20 arranged adjacently on the two adjacent mounting sections 11 can be used to transport battery cells of various sizes, thereby improving the applicability of the drive roller 1.

[0051] It is worth mentioning that the drive roller 1 only conveys one width of battery cell at a time.

[0052] In some embodiments, the roller 20 further includes a third wheel portion 23, which is disposed on the side of the second wheel portion 22 facing away from the first wheel portion 21 and connected to the second wheel portion 22. The diameter of the third wheel portion 23 is larger than the diameter of the second wheel portion 22. The third wheel portions 23 of two adjacent rollers 20 disposed on two adjacent mounting sections 11 cooperate to limit the battery cells.

[0053] Specifically, in the first roller 20a or the second roller 20b, the third wheel portion 23 is disposed on the side of the second wheel portion 22 facing away from the first wheel portion 21. The third wheel portion 23 of the first roller 20a and the second roller 20b cooperate to limit the battery cell along the axial direction of the roller body 10, so that the battery cell can be retained between the first wheel portion 21 or the second wheel portion 22 of the first roller 20a and the second roller 20b, thereby improving the stability of the battery cell during the transmission process.

[0054] Please see Figure 1 and Figure 2 In some embodiments, the drive roller 1 further includes a threaded fastener 30. A first threaded hole and a second threaded hole 231 are respectively provided on the mounting section 11 and the third wheel portion 23. The threaded fastener 30 passes through the first threaded hole and the second threaded hole 231 and is threadedly connected to them. The threaded fastener 30 can fix the roller 20 and the roller body 10 to prevent the roller 20 from sliding relative to the roller body 10, thereby improving the stability of the battery cell conveying.

[0055] In some embodiments, a portion of the threaded fastener 30 that passes through the second threaded hole 231 is entirely located within the second threaded hole 231. This prevents the threaded fastener 30 from protruding beyond the roller 20 and from scratching the battery cells, thus reducing the defect rate of the battery cell sintering.

[0056] In some embodiments, both the roller body 10 and the roller 20 are ceramic components. Since the solar cells are sintered at high temperatures, by making both the roller body 10 and the roller 20 ceramic components, which are resistant to high temperatures, the risk of burn-out due to high temperatures during the sintering of the solar cells can be reduced, thus extending the service life of the drive roller 1.

[0057] This application also provides a sintering apparatus, which includes a sintering body and a transmission roller 1 as described in any of the above embodiments. The sintering body has a sintering channel, and there are multiple transmission rollers 1 arranged along the extension direction of the sintering channel. All transmission rollers 1 cooperate to transport the battery cells so that the battery cells can be automatically input into and output from the sintering channel.

[0058] The sintering apparatus in this application has the effects of any of the above embodiments, and therefore will not be described in detail here.

[0059] This application also provides a solar cell manufacturing production line, which includes the sintering apparatus as described in the above embodiments.

[0060] The solar cell manufacturing production line in this application has the effects of any of the above embodiments, and therefore will not be described in detail here.

[0061] The aforementioned drive roller 1, sintering device, and solar cell manufacturing production line, in this application, by designing the outer peripheral side of the intermediate section 12 to be recessed relative to the outer peripheral side of the adjacent mounting section 11 to form a clearance portion, the distance between the solar cell and the outer peripheral side of the intermediate section 12 is increased. In this way, the solar cell and the outer peripheral side of the intermediate section 12 can maintain a certain safe distance. After the solar cell undergoes thermal deformation, the risk of it contacting the outer peripheral side of the intermediate section 12 and causing scratches or marks is reduced, thereby reducing the defect rate of the solar cell.

[0062] 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.

[0063] The embodiments described above are merely illustrative 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 all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A transmission roller, characterized in that, The transmission roller includes a roller body (10) and a roller (20). The roller body (10) includes an installation section (11) and an intermediate section (12). Each pair of adjacent installation sections (11) are connected by the intermediate section (12). The outer peripheral side of the intermediate section (12) is recessed relative to the outer peripheral side of the adjacent installation section (11) to form a clearance portion. The roller (20) is sleeved and fixed to one end of the installation section (11) near the intermediate section (12). Two rollers (20) arranged adjacent to each other on two adjacent installation sections (11) cooperate to transport battery cells. The roller (20) includes a first wheel portion (21) and a second wheel portion (22) connected together. The second wheel portion (22) is disposed on the side of the first wheel portion (21) facing away from the middle section (12) it is close to, and the diameter of the second wheel portion (22) is larger than the diameter of the first wheel portion (21). The first wheel portions (21) of two adjacent rollers (20) disposed on two adjacent mounting sections (11) cooperate, and the second wheel portions (22) of two adjacent rollers (20) disposed on two adjacent mounting sections (11) cooperate to transport the battery cells.

2. The transmission roller according to claim 1, characterized in that, The outer peripheral side of the intermediate section (12) is recessed by a dimension L relative to the outer peripheral side of the mounting section (11), where 2.9mm≤L≤3.1mm.

3. The transmission roller according to claim 1, characterized in that, The roller body (10) further includes a transition section (13), which is connected between the mounting section (11) and the intermediate section (12), and the outer diameter of the transition section (13) gradually increases from the intermediate section (12) to the mounting section (11).

4. The transmission roller according to claim 1, characterized in that, The roller (20) further includes a third wheel portion (23), which is disposed on the side of the second wheel portion (22) facing away from the first wheel portion (21) and connected to the second wheel portion (22). The diameter of the third wheel portion (23) is larger than the diameter of the second wheel portion (22). The third wheel portion (23) of the two adjacent rollers (20) arranged on the two adjacent mounting sections (11) cooperates to limit the battery cell.

5. The transmission roller according to claim 4, characterized in that, The transmission roller also includes a threaded fastener (30). The mounting section (11) and the third wheel section (23) are respectively provided with a first threaded hole and a second threaded hole (231). The threaded fastener (30) passes through the first threaded hole and the second threaded hole (231) and is threadedly connected to the first threaded hole and the second threaded hole (231).

6. The transmission roller according to claim 5, characterized in that, The entire section of the threaded fastener (30) that passes through the second threaded hole (231) is located inside the second threaded hole (231).

7. The transmission roller according to any one of claims 1 to 6, characterized in that, Both the roller body (10) and the roller wheel (20) are ceramic components.

8. A sintering apparatus, characterized in that, include: The sintering body contains sintering channels; as well as As described in any one of claims 1 to 7, there are multiple drive rollers arranged along the extension direction of the sintering channel, and all the drive rollers cooperate to transport the battery cells.

9. A solar cell manufacturing production line, characterized in that, Includes the sintering apparatus as described in claim 8 above.

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