Roller body wiping structure and coating device

Abstract

The utility model belongs to power battery processing device technical field provides a kind of roller body wiping structure and coating device, comprising: rubbing roller, it is rotatably arranged in one side of roller body, and the outer circumferential surface of rubbing roller is provided with at least partial wiping surface, and wiping surface is in abutment with the outer circumferential surface of roller body;Wherein, when rubbing roller rotates, wiping surface is driven synchronous rotation, and the outer circumferential surface of roller body is cleaned by the relative motion of wiping surface and roller body.Compared with prior art, the utility model is rotated by setting rubbing roller, so that the wiping surface of its outer circumferential surface is in close contact with roller body, and by the relative motion between the two, continuous, dynamic cleaning to the surface of roller body is realized.The structure can efficiently remove dry powder, dust and foreign matter attached to roller body, effectively prevent these pollutants from being transferred to the surface of tab protrusion to form dry material printing, and further significantly improve coating uniformity and the consistency of tab surface density, reduce product failure rate.

Description

Technical Field

[0001] This utility model belongs to the technical field of power battery processing equipment, specifically relating to a roller wiping structure and coating device. Background Technology

[0002] In the manufacturing process of lithium-ion battery front-end electrodes, the coating process is one of the key steps determining electrode quality. This process involves uniformly coating a slurry onto the surface of a current collector (such as copper or aluminum foil) to form an active material layer with a certain thickness and areal density. However, in actual coating processes, dry powder, dust, and foreign matter generated during equipment operation can easily adhere to the surfaces of key rollers such as coating rollers and metering rollers. As the rollers rotate, these impurities can lift the electrode, causing regional areal density abnormalities. This abnormality is known as "dry material mark" surface defect.

[0003] Dry material marks not only manifest as localized color differences or granular markings on the electrode surface, but more seriously, they can cause abnormal areal density in the corresponding areas—that is, localized coatings that are too thin or missing. This uneven areal density directly affects the insertion / extraction behavior of lithium ions inside the battery, resulting in increased internal resistance of the cell, decreased cycle performance, and even, in extreme cases, localized overheating, short circuits, and other safety hazards, seriously threatening the safety and lifespan of the battery.

[0004] Furthermore, the problem of dry powder printing defects significantly reduces the first-pass yield of the coating process. A large number of electrode sheets with such defects need to be reworked or scrapped, increasing the waste of raw materials and energy, and raising the overall manufacturing cost of the battery cells. With the increasing demands for high consistency and safety in power batteries and energy storage batteries, and the industry's urgent need for cost reduction and efficiency improvement, effectively removing dry powder, dust, and foreign matter adhering to the roller surface and suppressing the generation of dry powder printing at its source has become a key technical challenge in optimizing the coating process.

[0005] Therefore, there is an urgent need for a wiping structure that can clean the surface of the rollers in the coating device in real time, efficiently and stably, in order to ensure coating quality, improve product qualification rate and reduce the manufacturing cost of lithium batteries. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a roller wiping structure and coating device in light of the current state of the technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a roller wiping structure is proposed for wiping the rollers on a coating device, the wiping structure comprising:

[0008] A wiping roller is rotatably disposed on one side of the roller body. The outer peripheral surface of the wiping roller is provided with at least a partial wiping surface, which abuts against the outer peripheral surface of the roller body. When the wiping roller rotates, it drives the wiping surface to rotate synchronously, and the outer peripheral surface of the roller body is cleaned by the relative movement between the wiping surface and the roller body.

[0009] In one of the roller wiping structures described above, the rotation direction of the wiping roller is opposite to the rotation direction of the roller body.

[0010] In one of the roller wiping structures described above, the wiping surface is formed of nonwoven fabric disposed on the outer peripheral surface of the wiping roller.

[0011] The roller wiping structure described above also includes a dust collection cover, which has an opening extending along the axial direction of the wiping roller.

[0012] The wiping roller is rotatably disposed inside the dust collection hood, and a portion of the wiping surface is exposed outside the dust collection hood through the opening to contact the roller body; the dust collection hood is used to receive foreign objects removed from the roller body by the wiping surface.

[0013] In the aforementioned roller wiping structure, the dust collection hood is provided with a connection port, which communicates with the internal space of the dust collection hood; the connection port is used to connect a dust collection device to absorb foreign objects inside the dust collection hood.

[0014] In the aforementioned roller wiping structure, the dust collection hood includes a first side plate and a second side plate arranged parallel to each other. Both the first side plate and the second side plate extend along the axial direction of the wiping roller. A third side plate is provided at both ends of the first side plate and the second side plate along the axial direction of the wiping roller. At one end parallel to the axis of the wiping roller, the first side plate and the second side plate are connected together to a fourth side plate. At the other end, only one of the first side plate or the second side plate is connected to a fifth side plate. The fifth side plate is inclined so that the opening is inclined toward the roller body.

[0015] The roller wiping structure described above also includes:

[0016] The dust collection hood is fixed on the support frame;

[0017] Bearing housings are provided at both ends of the support frame along the axial direction of the wiping roller, and each bearing housing is equipped with a bearing;

[0018] The driving component is mounted on the support frame;

[0019] The wiping roller's shaft end is rotatably mounted on the support frame via the bearing, and one end of the wiping roller is connected to the output end of the drive component.

[0020] In the aforementioned roller wiping structure, the support frame is provided with connectors at both ends along the axial direction of the wiping roller, and one end of each connector is fixed to the dust collection cover.

[0021] In the aforementioned roller wiping structure, the driving component is a motor, and the output end of the motor is connected to the shaft end of the wiping roller through a reduction gear set.

[0022] This utility model also proposes a coating device to solve the above-mentioned technical problems, including the roller wiping structure described above.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) By setting a rotatable wiping roller, the wiping surface of its outer circumference is in close contact with the roller body, and the relative movement between the two achieves continuous and dynamic cleaning of the roller body surface. This structure can efficiently remove dry powder, dust and foreign matter adhering to the roller body, effectively preventing these contaminants from adhering to the roller surface and causing dry material marks to form on the electrode surface, thereby significantly improving the uniformity of coating and the consistency of electrode surface density, and reducing the product defect rate.

[0025] (2) Setting the rotation direction of the wiping roller to be opposite to that of the roller body can increase the relative linear velocity of the contact area between the two, enhance the wiping force and cleaning efficiency, remove stubborn deposits more thoroughly, further reduce the risk of dry material marks, and improve cleaning reliability.

[0026] (3) By setting up a dust collection hood and opening an opening on it that extends along the axial direction of the wiping roller, the wiping surface is partially exposed and in contact with the roller body. At the same time, it ensures that the foreign matter removed during the wiping process can be collected inside the dust collection hood, preventing dust from being re-entrained and polluting the environment or re-attached to the electrode sheet, thereby effectively maintaining the cleanliness of the coating area and improving the product yield.

[0027] (4) By setting a connection port on the dust collection hood and connecting it with the dust collection device, the active suction and real-time removal of accumulated foreign objects can be realized, effectively avoiding the cleaning failure problem caused by the dust collection hood overflowing, ensuring the long-term stable and efficient operation of the wiping structure, and meeting the stringent requirements for a high-cleanliness environment in the lithium battery production process.

[0028] (5) Through the coordinated design of the support frame, bearing seat and drive component, a stable installation foundation and reliable rotation support are provided for the wiping roller, ensuring that the wiping roller maintains stable operation during high-speed or long-term operation; the drive component directly drives the wiping roller to achieve automated cleaning without manual intervention, thereby improving the automation level and continuous operation capability of the coating production line. Attached Figure Description

[0029] Figure 1This is a perspective view of the roller wiping structure of this utility model in operation.

[0030] Figure 2 yes Figure 1 Top view.

[0031] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0032] Figure 4 It is a three-dimensional view of the connection between the wiping roller, dust collection hood, and bearing housing.

[0033] Figure 5 This is a 3D view of the dust collection hood.

[0034] In the diagram, 100 is the roller body; 200 is the wiping roller; 300 is the dust collection hood; 310 is the opening; 320 is the connection port; 330 is the first side plate; 340 is the second side plate; 350 is the third side plate; 360 is the fourth side plate; 370 is the fifth side plate; 400 is the support frame; 500 is the bearing seat; 600 is the bearing; 700 is the driving component; 800 is the connecting component; and 900 is the electrode sheet. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] like Figures 1 to 5 As shown, this utility model provides a roller wiping structure for wiping the roller 100 on a coating device. The wiping structure includes a wiping roller 200.

[0038] Specifically, the wiping roller 200 is rotatably disposed on one side of the roller body 100, and its outer peripheral surface is provided with at least a partial wiping surface, which abuts against the outer peripheral surface of the roller body 100. When the wiping roller 200 rotates, it drives the wiping surface to rotate synchronously, and the relative movement between the wiping surface and the roller body 100 achieves cleaning of the outer peripheral surface of the roller body 100.

[0039] In this embodiment, the roller 100 is a support roller (or back pressure roller) in the coating equipment used to support the electrode 900 and move synchronously with it, mainly used to provide dynamic support for the electrode 900. The wiping roller 200 removes dry powder, dust, and other foreign matter adhering to the surface of the roller 100. (Refer to...) Figure 1 and Figure 3 During operation, electrode 900 enters the coating area from the left side and, after coating is completed, proceeds along... Figure 3 The material continues to be conveyed in the indicated direction (e.g., clockwise around roller 100). During this process, any incompletely cured slurry or loose dry powder on the electrode 900 may fall off and adhere to the surface of roller 100.

[0040] The phrase "the outer peripheral surface of the wiping roller 200 is provided with at least a partial wiping surface" should be understood as follows: the wiping surface is arranged at a position corresponding to the area of ​​the roller body 100 where dry powder easily accumulates; in other embodiments, the wiping surface may also be arranged along the entire axial length of the wiping roller 200 to cover the entire outer surface area of ​​the roller body 100 except for the ends. When the wiping roller 200 rolls, its wiping surface continuously scrapes or adsorbs dry powder and other contaminants on the surface of the roller body 100, thereby achieving effective cleaning of the roller body 100.

[0041] This solution utilizes a rotatable wiping roller 200, ensuring close contact between its outer circumferential wiping surface and the roller body 100. The relative movement between the two enables continuous and dynamic cleaning of the roller body 100 surface. This structure efficiently removes dry powder, dust, and foreign matter adhering to the roller body 100, effectively preventing these contaminants from being transferred to the raised areas on the electrode 900 surface, thus significantly improving coating uniformity and the consistency of the electrode 900's surface density, and reducing product defect rates.

[0042] It is worth mentioning that the rotation direction of the wiping roller 200 is opposite to that of the roller body 100.

[0043] Setting the rotation direction of the wiping roller 200 to be opposite to that of the roller body 100 can increase the relative linear velocity of the contact area between the two, enhance the wiping force and cleaning efficiency, remove stubborn deposits more thoroughly, further reduce the risk of dry material marks, and improve cleaning reliability.

[0044] Preferably, the wiping surface is formed of a nonwoven fabric disposed on the outer peripheral surface of the wiping roller 200.

[0045] Using non-woven fabric as the wiping surface material has the advantages of good softness, strong dust absorption capacity, and less risk of damaging the roller surface. It can efficiently adsorb fine dust and dry powder, while avoiding scratches on the roller surface caused by hard scraping, ensuring long-term stable operation of the coating roller and extending the service life of the equipment.

[0046] To effectively collect dry powder, dust, and other foreign matter removed from the wiping surface and prevent these substances from re-adhering to the surface of the roller 100 after removal, this solution also includes a dust collection hood 300. The dust collection hood 300 is provided with an opening 310 extending axially along the wiping roller 200.

[0047] The wiping roller 200 is rotatably mounted inside the dust collection hood 300, with a portion of its wiping surface exposed outside the dust collection hood 300 through an opening 310 to contact the roller body 100. The function of the dust collection hood 300 is to receive and store foreign matter removed from the roller body 100 by the wiping surface.

[0048] By setting up a dust collection hood 300 and opening an opening 310 on it that extends along the axial direction of the wiping roller 200, the wiping surface is partially exposed and in contact with the roller body 100. At the same time, it ensures that foreign objects removed during the wiping process can be collected inside the dust collection hood 300, preventing dust from being re-entrained and polluting the environment or re-adhering to the electrode sheet 900, thereby effectively maintaining the cleanliness of the coating area and improving product yield.

[0049] Furthermore, the dust collection hood 300 is provided with a connection port 320, which communicates with the internal space of the dust collection hood 300 and is used to connect a dust collection device to absorb foreign objects inside the dust collection hood 300.

[0050] The dust collection device can be an industrial vacuum cleaner, a vacuum pump, or other negative pressure suction equipment. The dust collection device draws air from the dust collection hood 300 through the connection port 320, creating a negative pressure environment inside, thereby continuously sucking in and expelling foreign objects such as dry powder and dust.

[0051] By setting a connection port 320 on the dust collection hood 300 and connecting it to the dust collection device, active suction and real-time removal of accumulated foreign objects can be achieved, effectively avoiding the cleaning failure problem caused by the dust collection hood 300 overflowing, ensuring the long-term stable and efficient operation of the wiping structure, and meeting the stringent requirements for a high-cleanliness environment in the lithium battery production process.

[0052] More specifically, the dust collection hood 300 includes a first side plate 330 and a second side plate 340 arranged parallel to each other, both extending along the axial direction of the wiping roller 200. A third side plate 350 is provided at both ends of the first side plate 330 and the second side plate 340 along the axial direction of the wiping roller 200; at one end parallel to the axis of the wiping roller 200, the first side plate 330 and the second side plate 340 are connected to a fourth side plate 360; while at the other end, only one of the first side plate 330 or the second side plate 340 is connected to a fifth side plate 370. The fifth side plate 370 is inclined, such that the opening 310 on the dust collection hood 300 is inclined towards the roller body 100.

[0053] The first side plate 330, second side plate 340, third side plate 350, fourth side plate 360, and fifth side plate 370 can be manufactured using a one-piece molding process, or assembled by welding, gluing, or other mechanical connection methods. The dust collection hood 300, composed of the aforementioned first side plate 330, second side plate 340, third side plate 350, fourth side plate 360, and fifth side plate 370, forms a specific semi-enclosed cavity structure. The inclined design of the fifth side plate 370 aligns the opening 310 with the roller 100 at a certain angle, optimizing the contact posture between the wiping surface and the roller 100, improving the fit and cleaning effect, and also facilitating the guidance of foreign objects that fall off during wiping into the dust collection hood 300, effectively preventing dust leakage. The overall structure is compact, easy to install, and highly practical, suitable for coating equipment environments with limited space and strict cleanliness requirements.

[0054] This plan also includes:

[0055] Support frame 400, the dust collection hood 300 is fixed on the support frame 400;

[0056] Bearing seats 500, the support frame 400 is provided at both ends along the axial direction of the wiping roller 200, and each bearing seat 500 is installed with a bearing 600.

[0057] A drive component 700 is disposed on the support frame 400;

[0058] The wiping roller 200 is rotatably mounted on the support frame 400 via the bearing 600, and one end of the wiping roller 200 is connected to the output end of the drive unit 700.

[0059] Through the coordinated design of the support frame 400, bearing housing 500 and drive component 700, a stable mounting base and reliable rotation support are provided for the wiping roller 200, ensuring that the wiping roller 200 maintains stable operation during high-speed or long-term operation; the drive component 700 directly drives the wiping roller 200 to achieve automated cleaning without manual intervention, thereby improving the automation level and continuous operation capability of the coating production line.

[0060] Furthermore, the support frame 400 is provided with connectors 800 at both ends along the axial direction of the wiping roller 200, and one end of each connector 800 is fixed to the dust collection cover 300.

[0061] By setting connectors 800 at both ends of the support frame 400 and firmly fixing the dust collection cover 300 to it, the rigidity and overall stability of the entire wiping structure are enhanced, and the contact pressure between the wiping roller 200 and the roller body 100 is prevented from changing due to equipment vibration or uneven force, thereby ensuring the consistency and reliability of the cleaning effect.

[0062] The driving component 700 is a motor, and the output end of the motor is connected to the shaft end of the wiping roller 200 through a reduction gear set.

[0063] The wiping roller 200 is driven by a motor and a reduction gear set, which can precisely control the speed and output torque of the wiping roller 200 to adapt to different roller speeds and cleaning requirements. At the same time, the reduction structure can improve the output torque, ensuring that the wiping roller 200 can still operate stably under load conditions, improving the responsiveness and durability of the system, and making it suitable for high-precision coating scenarios.

[0064] This solution also proposes a coating apparatus, including the aforementioned roller 100 wiping structure.

[0065] The working process of this solution is as follows: When the roller body 100 provides dynamic support for the electrode 900 being coated, the drive component 700 drives the wiping roller 200 to rotate relative to the dust collection hood 300, and the rotation direction of the wiping roller 200 is opposite to the rotation direction of the roller body 100. During the rotation of the wiping roller 200, the wiping surface on its outer circumference continuously scrapes or adsorbs the dry powder, dust and other foreign matter attached to the surface of the roller body 100. At the same time, the dust collection device draws air from inside the dust collection hood 300 through the connection port 320, forming a negative pressure inside the dust collection hood 300, which promptly sucks in and discharges the removed dry powder, dust and other foreign matter, preventing them from being re-entrained or re-adhered to the electrode 900.

[0066] In summary, this solution provides a rationally designed, clean, efficient, and stable roller wiping structure for coating equipment and its application in the coating apparatus. Through the relative movement between the rotatable wiping roller 200 and the roller body 100, combined with the design of the non-woven wiping surface, dust collection hood 300, dust suction connection port 320, and inclined opening 310, dry powder, dust, and foreign matter adhering to the coating roller surface can be removed in real time and thoroughly, effectively preventing dry material printing defects. This structure possesses excellent sealing performance, automated drive capability, and robust mechanical support, significantly improving the uniformity and areal density consistency of the electrode 900 coating, greatly increasing the product qualification rate, and reducing rework and scrap costs. More importantly, it reduces battery performance degradation and safety risks caused by poor coating at the source, providing a reliable technical guarantee for the high-quality, high-efficiency, and low-cost manufacturing of lithium batteries.

[0067] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0069] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A roller wiping structure for wiping rollers on a coating apparatus, characterized in that, The wiping structure includes: A wiping roller is rotatably disposed on one side of the roller body. The outer peripheral surface of the wiping roller is provided with at least a partial wiping surface, which abuts against the outer peripheral surface of the roller body. When the wiping roller rotates, it drives the wiping surface to rotate synchronously, and the outer peripheral surface of the roller body is cleaned by the relative movement between the wiping surface and the roller body.

2. The roller wiping structure as described in claim 1, characterized in that, The direction of rotation of the wiping roller is opposite to the direction of rotation of the roller body.

3. The roller wiping structure as described in claim 1, characterized in that, The wiping surface is formed of nonwoven fabric disposed on the outer peripheral surface of the wiping roller.

4. The roller wiping structure as described in claim 1, characterized in that, It also includes a dust collection hood, which has an opening extending along the axial direction of the wiping roller; The wiping roller is rotatably disposed inside the dust collection hood, and a portion of the wiping surface is exposed outside the dust collection hood through the opening to contact the roller body; the dust collection hood is used to receive foreign objects removed from the roller body by the wiping surface.

5. The roller wiping structure as described in claim 4, characterized in that, The dust collection hood is provided with a connection port, which communicates with the internal space of the dust collection hood; the connection port is used to connect a vacuum cleaner to absorb foreign objects inside the dust collection hood.

6. The roller wiping structure as described in claim 4, characterized in that, The dust collection hood includes a first side plate and a second side plate arranged parallel to each other. Both the first side plate and the second side plate extend along the axial direction of the wiping roller. A third side plate is provided at both ends of the first side plate and the second side plate along the axial direction of the wiping roller. At one end parallel to the axis of the wiping roller, the first side plate and the second side plate are connected together to a fourth side plate. At the other end, only one of the first side plate or the second side plate is connected to a fifth side plate. The fifth side plate is inclined so that the opening is inclined toward the roller body.

7. The roller wiping structure as described in claim 4, characterized in that, Also includes: The dust collection hood is fixed on the support frame; Bearing housings are provided at both ends of the support frame along the axial direction of the wiping roller, and each bearing housing is equipped with a bearing; The driving component is mounted on the support frame; The wiping roller's shaft end is rotatably mounted on the support frame via the bearing, and one end of the wiping roller is connected to the output end of the drive component.

8. The roller wiping structure as described in claim 7, characterized in that, The support frame is provided with connectors at both ends along the axial direction of the wiping roller, and one end of each connector is fixed to the dust collection cover.

9. The roller wiping structure as described in claim 7, characterized in that, The driving component is a motor, and the output end of the motor is connected to the shaft end of the wiping roller through a reduction gear set.

10. A coating apparatus, characterized in that, Including a roller wiping structure as described in any one of claims 1 to 9.

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