Pole coating device and battery manufacturing equipment

Abstract

The present application discloses a pole piece coating device and a battery manufacturing equipment, the pole piece coating device comprises a material box, a rotating shaft, a plate roller, a rotating bearing and a rotating seal. The material box has a material storage cavity for storing materials, and the plate roller is connected to the rotating shaft. The circumferential edge of the plate roller extends into the material storage cavity, and the plate roller rotates under the drive of the rotating shaft and moves the material out of the material storage cavity. The rotating bearing is sleeved on the rotating shaft, the material box is connected to the rotating bearing, and the rotating bearing is used to rotatably connect the material box to the rotating shaft. The rotating seal is sleeved on the rotating shaft, and the rotating seal is arranged between the rotating bearing and the plate roller. The rotating seal is recessed inwardly toward the inner wall of the rotating shaft to form a residual material groove. The above-mentioned pole piece coating device and battery manufacturing equipment can reduce the leakage of materials in the material box and extend the service life of the device.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a pole piece coating device and battery manufacturing equipment. Background Art

[0002] Batteries are widely used in various electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy airplanes, electric toy ships, power tools and energy storage systems, etc.

[0003] As the application scope of batteries expands, the requirements for battery production and yield rate have also increased. Battery manufacturing equipment also needs to improve performance accordingly. How to reduce the loss of vulnerable parts in battery manufacturing equipment and extend the replacement cycle of equipment parts is also one of the technical issues studied in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a pole piece coating device and a battery manufacturing equipment, which can reduce the leakage of materials in the material box and extend the service life of the pole piece coating device.

[0005] In a first aspect, the present application provides an electrode coating device, comprising a material box, a rotating shaft, a plate roller, a rotating bearing and a rotating seal. The material box has a material storage cavity for storing materials, and the plate roller is connected to the rotating shaft. The circumferential edge of the plate roller extends into the material storage cavity, and the plate roller rotates under the drive of the rotating shaft and moves the material out of the material storage cavity. The rotating bearing is sleeved on the rotating shaft, and the material box is connected to the rotating bearing, and the rotating bearing is used to rotatably connect the material box to the rotating shaft. The rotating seal is sleeved on the rotating shaft, and the rotating seal is arranged between the rotating bearing and the plate roller. The rotating seal is recessed inward toward the inner wall of the rotating shaft to form a residual material groove.

[0006] In the technical solution of the embodiment of the present application, a material box is provided to store materials, provide a stable environment for the materials, and reduce the pollution of the materials by external impurities. The plate roller is arranged toward the electrode plate, and the outer periphery of the plate roller extends into the material storage cavity, which can dip the material and drive the material to move axially around the plate roller, and move from the material box to the surface of the plate to complete the coating. The rotating shaft is used to connect the power mechanism, and the rotating shaft rotates around its own axis under the drive of the power mechanism, and drives the plate roller to move. The material box is rotatably connected to the rotating shaft through a rotating bearing, which improves the integrity of the plate coating device and does not affect the rotation of the rotating shaft. In particular, a rotating seal is provided between the rotating bearing and the plate roller to block part of the material flowing from the plate roller to the rotating shaft, reducing the damage to the rotating bearing caused by the material flowing to the rotating bearing. In addition, a residual material groove is also provided on the rotating seal, which can store part of the material and guide the material back to the material box, further reducing the damage of the material to the rotating bearing, improving the operating stability of the rotating bearing, extending the replacement cycle of the rotating bearing, and extending the service life of the plate coating device.

[0007] In some embodiments, the residual material groove is arranged around the inner wall of the rotating seal to form an annular groove. In the above structure, the residual material groove is an annular structure, which can increase the material storage capacity and guide the material in all directions, thereby improving the efficiency of returning the material to the material box and reducing the leakage of the material.

[0008] In some embodiments, the outer wall of the rotating shaft is concave inward along the circumference to form a reflux groove, and the reflux groove is provided between the rotating seal and the rotating bearing, and the reflux groove can guide the material in the residual material groove to the material storage cavity. In the above structure, the outer wall of the rotating shaft is concave inward along the circumference to form a reflux groove, and the material flowing out of the rotating seal is guided into the reflux groove, and the material flows back into the material box with the rotation of the rotating shaft, thereby reducing the leakage of the material toward the rotating bearing and reducing the damage caused by the material to the rotating bearing.

[0009] In some embodiments, the pole piece coating device further comprises a seal sleeved on the rotating shaft, the seal is arranged between the rotating bearing and the rotating seal, and the seal is sealed and connected to the rotating shaft. In the above structure, the seal is arranged between the rotating bearing and the rotating seal to block the material leaking onto the rotating shaft, thereby reducing the material leakage in the direction of the rotating bearing.

[0010] In some embodiments, the seal includes a sealing ring and a support sleeve. The sealing ring is sleeved on the rotating shaft, and the sealing ring is sealed and connected to the rotating shaft. The support sleeve is arranged outside the sealing ring. In the above structure, the sealing ring is arranged to block the material on the rotating shaft, and the support sleeve protects the sealing cavity and improves the structural strength of the entire seal.

[0011] In some embodiments, the sealing ring includes a body and a guide portion. The body is sleeved outside the rotating shaft, the body is elastic, and the body and the rotating shaft are interference fit. The guide portion is formed by extending from the body toward the rotating seal, and the cross-sectional area of ​​the guide portion gradually decreases along the direction of the body toward the rotating seal. In the above structure, the body and the rotating shaft are interference fit, and the gap between the body and the rotating shaft can be filled by the elasticity of the body itself, thereby reducing the leakage of materials from the gap between the seal and the rotating shaft during the rotation of the rotating shaft. The guide portion shrinks in the direction of the rotating seal, blocks and guides the leaked material in the rotating seal, guides the material into the material box, and improves the sealing performance.

[0012] In some embodiments, the reflux groove is provided between the guide part and the rotating seal. The above structure blocks and refluxes the material flowing from the plate roller to the rotating shaft through the three anti-leakage measures of the rotating seal blocking and storing the material, the reflux groove guiding the flow, and the seal sealing, thereby reducing the leakage of the material to the rotating bearing as much as possible, extending the service life of the rotating bearing, reducing the replacement frequency, improving the production efficiency of the pole piece, and improving the stability of the pole piece coating process.

[0013] In some embodiments, the electrode coating device further includes a scraper assembly, and the scraper assembly includes a blade and a telescopic assembly. The blade is arranged toward the circumferential edge of the plate roller, and the blade is used to scrape off part of the material on the plate roller. One end of the telescopic assembly is arranged in the material box, and the other end of the telescopic assembly is connected to the blade. The telescopic assembly can retract and adjust the gap between the blade and the plate roller. In the above structure, the scraper assembly is provided to scrape off the excess material on the plate roller, guide the flow of the material, and reduce the leakage of the material. In addition, the amount of material on the surface of the plate roller is adjusted to a preset range, and the amount of material coated on the electrode by the plate roller is controlled to improve the accuracy of the coating process. The telescopic assembly adjusts the gap between the blade and the plate roller, controls the amount of material scraped off the plate roller by the blade, and adjusts the efficiency and accuracy of the coating process control.

[0014] In some embodiments, the telescopic assembly includes a connecting rod, a slider and a guide rod. One end of the connecting rod is hinged to the material box, and the slider is connected to the end of the connecting rod away from the material box. The guide rod is arranged on the material box, and the guide rod extends along the radial direction of the plate roller. The slider is arranged on the guide rod and slides along the guide rod. The blade is connected to the slider, and the slider drives the blade to move along the radial direction of the plate roller.

[0015] One end of the connecting rod is hinged to the material box, and the other end is connected to the slider. The rotation of the connecting rod drives the slider to move. The slider is set on the guide rod, and the moving path of the slider is limited to the extension direction of the guide rod. The slider is connected to the blade, and the movement of the slider controls the gap between the blade and the plate roller. The above structure has high control accuracy and is easy to operate.

[0016] In some embodiments, the telescopic assembly further includes a driving motor, the end of the connecting rod is bent to form a connecting portion, the driving motor is connected to the connecting portion, and drives the connecting rod to rotate relative to the material box. By providing the driving motor, the control accuracy and efficiency are improved.

[0017] In some embodiments, the electrode coating device further includes a pre-scraper, which is arranged in the material box, is arranged toward the circumferential edge of the plate roller, and is arranged upstream of the blade along the material conveying direction of the plate roller. In the above structure, by arranging the pre-scraper, excess material is scraped off the plate roller and diverted, reducing the risk of material leakage.

[0018] In some embodiments, the edge of the pre-scraper facing the plate roller protrudes toward the plate roller and extends to the end surface of the plate roller along the axial direction to form a side scraping portion, which is used to scrape off the material on the end surface of the plate roller. The above structure scrapes off the excess material on the end surface of the plate roller, reduces the risk of leakage caused by the material on the end surface flowing to the rotating shaft, reduces the leakage of material to the rotating bearing, and prolongs the service life of the rotating bearing.

[0019] In a second aspect, the present application provides a battery manufacturing device, which includes the electrode coating device in the above-mentioned embodiment.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0022] Figure 1 It is a partial structural schematic diagram of a pole piece coating device in some embodiments of the present application;

[0023] Figure 2 This is a schematic diagram of the exploded structure of a pole piece coating device according to some embodiments of the present application;

[0024] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a pole piece coating device according to some embodiments of the present application;

[0025] Figure 4 It is a partial structural schematic diagram of a pole piece coating device in some other embodiments of the present application;

[0026] Figure 5 It is a schematic diagram of a partial cross-sectional structure of a pole piece coating device in some other embodiments of the present application;

[0027] Figure 6 This is a schematic diagram of the structure of the scraper assembly of some embodiments of the present application.

[0028] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0029] 1. Pole coating device; 10. Material box; 101. Material storage chamber; 20. Plate roller; 30. Rotating bearing; 40. Rotating seal; 401. Residual material trough; 50. Seal; 501. Sealing ring; 502. Support sleeve; 503. Main body; 504. Guide part; 60. Rotating shaft; 601. Reflow trough; 70. Scraper assembly; 701. Blade; 702. Telescopic assembly; 703. Connecting rod; 704. Sliding block; 705. Guide rod; 706. Driving motor; 707. Connecting part; 708. Pre-scraper. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0040] Battery devices are widely used in various electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric ships, electric toy cars, electric toy planes, electric toy ships, electric tools and energy storage systems, etc. The battery device (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include multiple battery cells, and the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0041] Illustratively, a battery cell may be the smallest unit constituting a battery device.

[0042] In some embodiments, the battery cell includes a housing and an electrode assembly contained in the housing. The electrode assembly includes a positive electrode sheet and a negative electrode sheet. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. Optionally, the electrode assembly also includes a separator disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes while allowing active ions to pass through. The battery cell also includes an electrolyte contained in the housing. The electrolyte plays the role of conducting ions between the positive and negative electrodes.

[0043] Illustratively, the positive electrode plate includes a positive electrode current collector and an active material layer coated on the surface of the positive electrode current collector, and the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector.

[0044] During the electrode coating process, the current collector moves between the feeding reel and the winding reel. The electrode coating device is arranged on the moving path of the electrode. One side of the plate roller in the electrode coating device faces the current collector, and the other side contacts the active material in the material box. The plate roller rotates under the drive of the rotating shaft and dips the material in the material box. During the rotation process, the material is moved to the surface of the electrode by the plate roller, thereby completing the coating.

[0045] In order to improve the convenience of material removal and the integrity of the electrode coating device, the material box is connected to the rotating shaft through the bearing. During the rotation of the shaft, the material on the plate roller will move with the shaft and flow into the bearing. Since the material contains some particulate matter, the bearing is easily damaged and needs to be replaced frequently, which reduces production efficiency and increases production costs.

[0046] Based on the above problems, the embodiment of the present application provides a pole piece coating device, which is provided with a material box to store materials, provide a stable environment for the materials, and reduce the pollution of the materials by external impurities. The plate roller is used to be arranged toward the electrode pole piece, and the outer periphery of the plate roller extends into the material storage cavity, which can dip the material and drive the material to move around the axial direction of the plate roller, and move from the material box to the pole piece surface to complete the coating. The rotating shaft is used to connect the power mechanism, and the rotating shaft rotates around its own axis under the drive of the power mechanism, and drives the plate roller to move. The material box is rotatably connected to the rotating shaft through a rotating bearing, which improves the integrity of the pole piece coating device and does not affect the rotation of the rotating shaft. In particular, a rotating seal is provided between the rotating bearing and the plate roller to block part of the material flowing from the plate roller to the rotating shaft, reduce the material flowing toward the rotating bearing, and damage the rotating bearing. In addition, a residual material groove is also provided on the rotating seal, which can store part of the material and guide the material back to the material box, further reducing the damage of the material to the rotating bearing, improving the operating stability of the rotating bearing, extending the replacement cycle of the rotating bearing, and extending the service life of the pole piece coating device.

[0047] Please refer to Figures 1 to 3 , Figure 1 This is a partial structural diagram of a pole piece coating device 1 according to an embodiment of the present application. Figure 2 This is a schematic diagram of the exploded structure of a pole piece coating device 1 according to an embodiment of the present application. Figure 3 It is a schematic cross-sectional structural diagram of a pole piece coating device 1 according to an embodiment of the present application.

[0048] As shown in the figure, the electrode coating device 1 provided in the embodiment of the present application includes a material box 10, a rotating shaft 60, a plate roller 20, a rotating bearing 30 and a rotating seal 40. The material box 10 has a material storage cavity 101 for storing materials, and the plate roller 20 is connected to the rotating shaft 60. The circumferential edge of the plate roller 20 extends into the material storage cavity 101, and the plate roller 20 rotates under the drive of the rotating shaft 60 and removes the material from the material storage cavity 101. The rotating bearing 30 is sleeved on the rotating shaft 60, and the material box 10 is connected to the rotating bearing 30, and the rotating bearing 30 is used to rotatably connect the material box 10 to the rotating shaft 60. The rotating seal 40 is sleeved on the rotating shaft 60, and the rotating seal 40 is arranged between the rotating bearing 30 and the plate roller 20. The rotating seal 40 is recessed inward toward the inner wall of the rotating shaft 60 to form a residual material groove 401.

[0049] Exemplarily, the plate roller 20 is a cylindrical structure with a central through hole, and the plate roller 20 and the rotating shaft 60 are coaxially arranged. The surface of the plate roller 20 has a plurality of recesses, which increases the contact area between the plate roller 20 and the material, increases the amount of material on the surface of the plate roller 20, and reduces the fluidity of the material, thereby improving the control accuracy of the material coating. The plate roller 20 can be made of a metal material with a certain structural strength, such as stainless steel, copper or aluminum alloy. The rotating shaft 60 can be connected to a drive motor 706, and the drive motor 706 is connected to a control device to control the speed and angle of rotation of the plate roller 20.

[0050] The rotary seal 40 may be a structure having a central through hole, and the inner wall of the rotary seal 40 is in contact with the rotating shaft 60. The rotary seal 40 may be made of materials such as aluminum alloy, copper or stainless steel.

[0051] In the technical solution of the embodiment of the present application, a material box 10 is provided to store materials, to provide a stable environment for the materials, and to reduce the contamination of the materials by external impurities. The plate roller 20 is used to be arranged toward the electrode pole piece, and the outer periphery of the plate roller 20 extends into the material storage cavity 101, which can dip the material and drive the material to move axially around the plate roller 20, and move from the material box 10 to the surface of the pole piece to complete the coating. The rotating shaft 60 is used to connect the power mechanism, and the rotating shaft 60 rotates around its own axis under the drive of the power mechanism, and drives the plate roller 20 to move. The material box 10 is rotatably connected to the rotating shaft 60 through the rotating bearing 30, which improves the integrity of the pole piece coating device 1, and does not affect the rotation of the rotating shaft 60. In particular, a rotating seal 40 is provided between the rotating bearing 30 and the plate roller 20 to block part of the material flowing from the plate roller 20 to the rotating shaft 60, thereby reducing the flow of the material toward the rotating bearing 30 and damaging the rotating bearing 30. In addition, a residual material trough 401 is also provided on the rotating seal 40, which can store part of the material and guide the material back into the material box 10, further reducing the damage of the material to the bearing of the rotating shaft 60, improving the operating stability of the rotating bearing 30, extending the replacement cycle of the rotating bearing 30, and extending the service life of the pole piece coating device 1.

[0052] The electrode coating device 1 of the present application reduces the leakage of materials during the coating process, improves the sealing performance of the equipment, and extends the replacement cycle of parts. It is not only limited to the coating of active substances, but can also be widely used in various rotating equipment that needs to process materials, such as coating machines, printing machines, etc., without limitation here.

[0053] In some embodiments of the present application, the residual material groove 401 is circumferentially arranged along the inner wall of the rotating seal 40 to form an annular groove.

[0054] The ring-shaped residual material groove 401 can make full use of space. Compared with a linear or point-shaped structure, it has a stronger ability to store materials. More materials can be stored in the same space, which improves the material handling capacity of the equipment. The ring-shaped residual material groove 401 allows the material to be evenly distributed along the circumference of the groove during the rotation process. When the material is subjected to centrifugal force during the rotation process, the ring-shaped groove can provide an additional barrier to reduce the material leaking from the gap. In addition, the material flows more smoothly to the material box 10 under the action of centrifugal force, reducing the risk of material accumulation and blockage in a certain area, while reducing the waste of material.

[0055] In the above structure, the residual material trough 401 is an annular structure, which can increase the material storage capacity and guide the material in all directions, thereby improving the efficiency of the material returning to the material box 10 and reducing leakage.

[0056] In some embodiments of the present application, the outer wall of the rotating shaft 60 is concave inward along the circumferential direction to form a reflux groove 601, and the reflux groove 601 is arranged between the rotating seal 40 and the rotating bearing 30. The reflux groove 601 can guide the material in the residual material groove 401 to the storage chamber 101.

[0057] In the above structure, the outer wall of the rotating shaft 60 is concave inward along the circumferential direction to form a reflux groove 601, which guides the material flowing out of the rotating seal 40 into the reflux groove 601, and flows back into the material box 10 along with the rotation of the rotating shaft 60, thereby reducing the leakage of the material toward the rotating bearing 30 and reducing the damage caused by the material to the rotating bearing 30.

[0058] In some embodiments of the present application, the pole piece coating device 1 further includes a seal 50 sleeved on the rotating shaft 60 , the seal 50 is disposed between the rotating bearing 30 and the rotating seal 40 , and the seal 50 is sealedly connected to the rotating shaft 60 .

[0059] The seal 50 is used to block the material leaking from the rotating seal 40 or other parts of the rotating shaft 60. By closely fitting the rotating shaft 60, the seal 50 can form an effective barrier to prevent the material from entering the key components such as the rotating bearing 30. The rotating bearing 30 is a key component in the pole piece coating device 1, and its performance directly affects the operating efficiency and stability of the equipment. The seal 50 can effectively protect the rotating bearing 30 from erosion and damage by the material, thereby extending its service life.

[0060] Exemplarily, the sealing member 50 and the rotating shaft 60 are connected in a sealed manner, such as an interference fit, an elastic seal, etc. This connection manner can ensure a close fit between the sealing member 50 and the rotating shaft 60 and reduce material leakage.

[0061] In the above structure, the seal 50 is provided between the rotating bearing 30 and the rotating seal 40 to block the material leaking onto the rotating shaft 60 , thereby reducing the material leakage toward the rotating bearing 30 .

[0062] In some embodiments of the present application, the sealing member 50 includes a sealing ring 501 and a supporting sleeve 502. The sealing ring 501 is sleeved on the rotating shaft 60, and the sealing ring 501 is sealed and connected to the rotating shaft 60. The supporting sleeve 502 is arranged outside the sealing ring 501.

[0063] The sealing ring 501 is sleeved on the rotating shaft 60 to improve the sealing performance between the rotating shaft 60 and the sealing chamber. Through close contact with the rotating shaft 60, the sealing ring 501 can effectively prevent the material from leaking out from the gap between the rotating shaft 60 and the sealing chamber. The material selection of the sealing ring 501 is usually based on its wear resistance, corrosion resistance and elasticity to ensure a stable sealing effect in long-term use. The sealing sleeve can be made of Teflon, rubber or silicone.

[0064] The support sleeve 502 is arranged outside the sealing ring 501, providing an additional protective layer for the sealing ring 501. The support sleeve 502 can prevent the sealing ring 501 from being damaged when subjected to external pressure or impact, thereby extending the service life of the sealing ring 501. Exemplarily, the support sleeve 502 can be made of copper or aluminum alloy. At the same time, the support sleeve 502 also enhances the structural strength of the entire sealing element 50, enabling it to withstand greater mechanical stress and load.

[0065] The above technical solution forms a sealing system that can prevent material leakage and has high structural strength by combining the sealing ring 501 and the support sleeve 502. This structural design not only improves the reliability and durability of the equipment, but also reduces maintenance costs.

[0066] In some embodiments of the present application, the sealing ring 501 includes a body 503 and a guide portion 504. The body 503 is sleeved outside the rotating shaft 60, the body 503 is elastic, and the body 503 and the rotating shaft 60 are interference fit. The guide portion 504 is formed extending from the body 503 toward the rotating seal 40, and the cross-sectional area of ​​the guide portion 504 gradually decreases along the direction of the body 503 toward the rotating seal 40.

[0067] Interference fit means that the inner diameter of the body 503 is smaller than the outer diameter of the shaft 60, and during installation, the body 503 adapts to the shaft 60 through elastic deformation, thereby achieving close contact. In addition, the elastic characteristics of the body 503 enable it to continuously fill the tiny gap between the body 503 and the shaft 60 during the rotation of the shaft 60, thereby reducing the possibility of material leakage. This not only improves the reliability of the seal, but also reduces equipment failures and maintenance costs caused by material leakage.

[0068] The guide portion 504 is formed by extending from the main body 503 toward the rotating seal 40, and its cross-sectional area gradually decreases, presenting a contracted shape. This design enables the guide portion 504 to form a trumpet-like shape, effectively blocking and guiding the material leaking from the rotating seal 40. The guide portion 504 guides the leaked material into the material box 10, thereby reducing the risk of the material spreading and accumulating inside the device, and further improving the sealing performance. In addition, the contracted shape of the guide portion 504 also helps to reduce the resistance of the material during the diversion process, so that the material can be guided into the material box 10 more smoothly.

[0069] By combining the functions of the body 503 and the guide part 504, the seal ring 501 structure realizes double protection of the material of the rotating shaft 60. The body 503 fills the gap and reduces leakage through interference fit and elastic deformation; while the guide part 504 blocks and guides the leaked material through contraction. This not only improves the reliability and durability of the seal, but also makes the maintenance of the equipment simpler and more convenient.

[0070] In the above structure, the body 503 and the rotating shaft 60 are interference-fitted, and the gap between the body 503 and the rotating shaft 60 can be filled by the elasticity of the body 503 itself, thereby reducing the leakage of materials from the gap between the seal 50 and the rotating shaft 60 during the rotation of the rotating shaft 60. The guide portion 504 shrinks toward the direction of the rotating seal 40, blocks and guides the leaked materials in the rotating seal 40, and guides the materials into the material box 10, thereby improving the sealing performance.

[0071] In some optional embodiments, the body 503 and the guide portion 504 are an integrally formed structure. The above structure can further improve the sealing performance of the sealing ring 501.

[0072] In some embodiments of the present application, the reflow groove 601 is disposed between the guide portion 504 and the rotary seal 40 .

[0073] The rotary seal 40 is the first line of defense to prevent the material from flowing from the plate roller 20 to the rotating shaft 60. It effectively prevents the material from leaking out from the sealing gap through close contact and appropriate sealing materials.

[0074] The reflux groove 601 is the second line of defense, which is arranged between the guide part 504 and the rotary seal 40, forming an additional material collection and diversion system. When the material tries to leak through the small gap between the rotary seal 40 and the guide part 504, the reflux groove 601 can capture the material and guide it back to other parts in the system (such as the material box 10), thereby reducing the material from directly leaking to the rotating bearing 30. The design of the reflux groove 601 takes into account the fluidity and diversion efficiency of the material, ensuring that the material can be smoothly guided to the predetermined position.

[0075] The seal 50 is the third line of defense against leakage. Through appropriate materials and structural design, the seal 50 improves the tightness of contact with the rotating shaft 60, further reducing the possibility of material leakage. The elasticity and wear resistance of the seal 50 also enable it to maintain a stable sealing effect during long-term use.

[0076] The above structure uses triple anti-leakage measures such as the rotating seal 40 to block and store materials, the reflux groove 601 to guide flow, and the seal 50 to seal, so as to block and reflux the material flowing from the plate roller 20 to the rotating shaft 60, thereby reducing the leakage of materials to the rotating bearing 30 as much as possible, extending the service life of the rotating bearing 30, reducing the replacement frequency, improving the production efficiency of the pole piece, and improving the stability of the pole piece coating process.

[0077] like Figures 4 to 6 In some embodiments of the present application, the electrode coating device 1 further includes a scraper assembly 70, and the scraper assembly 70 includes a blade 701 and a telescopic assembly 702. The blade 701 is arranged toward the circumferential edge of the plate roller 20, and the blade 701 is used to scrape off part of the material on the plate roller 20. One end of the telescopic assembly 702 is arranged on the material box 10, and the other end of the telescopic assembly 702 is connected to the blade 701. The telescopic assembly 702 can be telescopic and adjust the gap between the blade 701 and the plate roller 20.

[0078] The blade 701 is arranged at the circumferential edge of the plate roller 20, and its main function is to scrape off the excess material on the plate roller 20. By closely contacting the surface of the plate roller 20, the blade 701 can remove the excess coating on the plate roller 20 and accurately control the amount of material to be transferred to the pole piece. The material and hardness of the blade 701 are usually selected according to the type of coating and coating requirements to ensure the best scraping effect and coating quality.

[0079] One end of the telescopic component 702 is connected to the material box 10 (or other fixed structure), and the other end is connected to the blade 701, forming an adjustable scraper system. The telescopic component 702 can be telescoped and adjust the gap between the blade 701 and the plate roller 20, which is the key to controlling the amount of scraped material. By adjusting the size of the gap, the amount of material scraped off the plate roller 20 by the blade 701 can be accurately controlled, thereby adjusting the amount of material coated on the electrode.

[0080] In the above structure, the setting of the scraper assembly 70 not only helps to guide the flow direction of the material and reduce the leakage of the material, but also can adjust the amount of material on the surface of the plate roller 20 to a preset range. Through the adjustment of the telescopic assembly 702, it can flexibly adapt to different coating requirements and ensure the stability and consistency of the coating quality.

[0081] In some optional embodiments, the telescopic assembly 702 further includes an automatic control device. The automatic control device may include a controller and a sensor, the controller is electrically connected to the telescopic assembly 702, and the sensor is used to sense the gap between the blade 701 and the pole piece. The gap between the blade 701 and the plate roller 20 and the coating quality can be monitored by the sensor, and the position of the telescopic assembly 702 can be adjusted in real time to achieve the best coating effect.

[0082] In some embodiments of the present application, the telescopic assembly 702 includes a connecting rod 703, a slider 704, and a guide rod 705. One end of the connecting rod 703 is hinged to the material box 10, and the slider 704 is connected to the end of the connecting rod 703 away from the material box 10. The guide rod 705 is arranged on the material box 10, and the guide rod 705 extends along the radial direction of the plate roller 20. The slider 704 is arranged on the guide rod 705 and slides along the guide rod 705. The blade 701 is connected to the slider 704, and the slider 704 drives the blade 701 to move along the radial direction of the plate roller 20. One end of the connecting rod 703 is hinged to the material box 10, and the other end is connected to the slider 704. The rotation of the connecting rod 703 drives the slider 704 to move. The slider 704 is arranged on the guide rod 705, and the moving path of the slider 704 is limited to the extension direction of the guide rod 705. The slider 704 is connected to the blade 701, and the movement of the slider 704 controls the gap between the blade 701 and the plate roller 20.

[0083] One end of the connecting rod 703 is hinged to the material box 10, and the connecting rod 703 can rotate within a certain range. The other end of the connecting rod 703 is connected to the slider 704, and the movement of the slider 704 is driven by the rotation of the connecting rod 703. The guide rod 705 is arranged on the material box 10, and the guide rod 705 extends along the radial direction of the plate roller 20, and the relative position between the guide rod 705 and the material box 10 is fixed, so the guide rod 705 provides a stable sliding track for the slider 704.

[0084] The blade 701 is connected to the slider 704 and moves with the movement of the slider 704. The moving path of the slider 704 is limited to the extension direction of the guide rod 705, which improves the stability and accuracy of the movement of the blade 701. The movement of the slider 704 is driven by the rotation of the connecting rod 703, thereby controlling the gap between the blade 701 and the plate roller 20. This not only improves the accuracy of control, but also makes the operation easier and more intuitive. The structure of the telescopic component 702 is compact and stable, and can adapt to different coating requirements and working environments. The above structure has high control accuracy and is easy to operate.

[0085] In some embodiments of the present application, the telescopic assembly 702 further includes a driving motor 706 , the end of the connecting rod 703 is bent to form a connecting portion 707 , the driving motor 706 is connected to the connecting portion 707 , and drives the connecting rod 703 to rotate relative to the material box 10 .

[0086] The driving motor 706 is connected to the connecting portion 707 formed by the bending of the connecting rod 703, and provides power for the rotation of the connecting rod 703. By accurately controlling the speed and direction of the motor, the rotation angle and speed of the connecting rod 703 can be accurately adjusted, thereby accurately controlling the movement of the slider 704 and the blade 701. Compared with manual operation, the driving motor 706 can provide a more stable and accurate rotation torque, thereby reducing the error caused by human operation.

[0087] Optionally, by integrating sensors and feedback systems, the rotation angle and speed of the connecting rod 703 can be monitored in real time, and the output of the motor can be adjusted as needed to achieve higher control accuracy.

[0088] The driving motor 706 can quickly respond to the control signal to realize the rapid rotation of the connecting rod 703 and the rapid movement of the slider 704. This not only improves the efficiency of the coating process, but also shortens the time required to adjust the gap between the blade 701 and the plate roller 20, thereby improving the overall production efficiency.

[0089] like Figure 2 As shown, in some embodiments of the present application, the electrode coating device 1 also includes a pre-scraper 708, which is arranged in the material box 10, and the pre-scraper 708 is arranged toward the circumferential edge of the plate roller 20, and the pre-scraper 708 is arranged upstream of the blade 701 along the material transport direction of the plate roller 20.

[0090] The pre-scraper 708 is arranged in the material box 10, facing the circumferential edge of the plate roller 20. It is located upstream of the blade 701 along the material conveying direction of the plate roller 20, which means that the pre-scraper 708 will first contact the plate roller 20 before the material is scraped off by the blade 701. The main function of the pre-scraper 708 is to scrape off the excess material on the plate roller 20, especially those materials that may accumulate or overflow during the coating process due to various reasons (such as uneven materials, uneven surface of the plate roller 20, etc.). By scraping off the excess material from the plate roller 20 and directing it back to the material box 10 or other collection device, the pre-scraper 708 helps reduce the risk of material leakage. The pre-scraper 708 can also help to level the material layer on the plate roller 20, providing more uniform and stable scraping conditions for the subsequent main scraper.

[0091] It is understandable that, since the pre-scraper 708 is located upstream of the material flow, it can effectively prevent excess material from continuing to flow downstream and reduce the risk of leakage caused by material accumulation. By controlling the material in the material box 10, the pre-scraper 708 helps to maintain the cleanliness and tidiness of the coating area, thereby improving the stability and reliability of the coating process.

[0092] Furthermore, the pre-scraper 708 reduces the fluctuation and unevenness of the material on the plate roller 20, thereby improving the uniformity and consistency of the material layer coated on the pole piece. This is particularly important for applications such as lithium-ion battery pole pieces that require high-precision coating, because it directly affects the performance and safety of the battery.

[0093] In the above structure, by providing the pre-scraper 708, the excess material is scraped off from the plate roller 20 and diverted, thereby reducing the risk of material leakage and improving the coating quality.

[0094] In some embodiments of the present application, a portion of the edge of the pre-scraper 708 facing the plate roller 20 protrudes toward the plate roller 20 and extends to the axial end surface of the plate roller 20 to form a side scraping portion for scraping off material on the end surface of the plate roller 20.

[0095] The side scraper is a portion formed by the edge of the pre-scraper 708 protruding toward the plate roller 20 and extending to the axial end surface of the plate roller 20. Its main function is to scrape off the excess material on the end surface of the plate roller 20, which may accumulate on the end surface of the plate roller 20 due to various reasons (such as material overflow, uneven surface of the plate roller 20, etc.). If the material on the end surface of the plate roller 20 is not scraped off in time, it may flow to the area of ​​the rotating shaft 60, thereby causing leakage. The setting of the side scraper can scrape off the material on the end surface of the plate roller 20 and guide it back to the material box 10 or other collection devices, thereby reducing the risk of leakage caused by material leakage to the rotating shaft 60. If the material leaks to the rotating bearing 30, it may cause problems such as poor bearing lubrication and increased wear, thereby affecting the stability of the coating process and product quality. The setting of the side scraper effectively reduces the risk of material leakage to the rotating bearing 30, thereby protecting the bearing and extending its service life.

[0096] Furthermore, by scraping off the excess material on the end surface of the plate roller 20, the side scraper helps to keep the surface of the plate roller 20 clean and flat. This is relevant to improving the uniformity and consistency of the material layer coated on the pole piece, because any slight material fluctuation may affect the coating quality, so the provision of the pre-scraper 708 improves the quality of pole piece coating.

[0097] The above structure scrapes off the excess material on the end surface of the plate roller 20 , reduces the risk of leakage caused by the material on the end surface flowing to the rotating shaft 60 , reduces the material leakage to the rotating bearing 30 , and extends the service life of the rotating bearing 30 .

[0098] In some optional embodiments, the pole piece coating device 1 includes a material box 10, a rotating shaft 60, a plate roller 20, a rotating bearing 30 and a rotating seal 40. The material box 10 has a material storage cavity 101 for storing materials, and the plate roller 20 is connected to the rotating shaft 60. The circumferential edge of the plate roller 20 extends into the material storage cavity 101, and the plate roller 20 rotates under the drive of the rotating shaft 60 and removes the material from the material storage cavity 101. The rotating bearing 30 is sleeved on the rotating shaft 60, and the material box 10 is connected to the rotating bearing 30, and the rotating bearing 30 is used to rotatably connect the material box 10 to the rotating shaft 60. The rotating seal 40 is sleeved on the rotating shaft 60, and the rotating seal 40 is arranged between the rotating bearing 30 and the plate roller 20. The rotating seal 40 is recessed inward toward the inner wall of the rotating shaft 60 to form a residual material groove 401. The residual material groove 401 is arranged circumferentially along the inner wall of the rotating seal 40 to form an annular groove. The outer wall of the rotating shaft 60 is concave inward along the circumferential direction to form a reflux groove 601, and the reflux groove 601 is arranged between the rotating seal 40 and the rotating bearing 30. The pole piece coating device 1 also includes a seal 50 sleeved on the rotating shaft 60, and the seal 50 is arranged between the rotating bearing 30 and the rotating seal 40, and the seal 50 is sealed and connected to the rotating shaft 60. The seal 50 includes a sealing ring 501 and a supporting sleeve 502. The sealing ring 501 is sleeved on the rotating shaft 60, and the sealing ring 501 is sealed and connected to the rotating shaft 60. The supporting sleeve 502 is arranged outside the sealing ring 501. The reflux groove 601 is arranged between the guide part 504 and the rotating seal 40. The pole piece coating device 1 also includes a scraper assembly 70, and the scraper assembly 70 includes a blade 701 and a telescopic assembly 702. The telescopic assembly 702 includes a connecting rod 703, a slider 704 and a guide rod 705. The telescopic assembly 702 further includes a driving motor 706 . The end of the connecting rod 703 is bent and extended to form a connecting portion 707 . The driving motor 706 is connected to the connecting portion 707 and drives the connecting rod 703 to rotate relative to the material box 10 .

[0099] The embodiment of the present application also provides a battery manufacturing device, which includes the electrode coating device 1 in the above embodiment. A material box 10 is set to store materials, provide a stable environment for the materials, and reduce the pollution of the materials by external impurities. The plate roller 20 is used to be set toward the electrode plate, and the outer periphery of the plate roller 20 extends into the material storage cavity 101, which can dip the material and drive the material to move around the axial direction of the plate roller 20, and move from the material box 10 to the surface of the electrode to complete the coating. The rotating shaft 60 is used to connect the power mechanism, and the rotating shaft 60 rotates around its own axis under the drive of the power mechanism, and drives the plate roller 20 to move. The material box 10 is rotatably connected to the rotating shaft 60 through the rotating bearing 30, which improves the integrity of the electrode coating device 1 and does not affect the rotation of the rotating shaft 60. In particular, a rotating seal 40 is set between the rotating bearing 30 and the plate roller 20 to block part of the material flowing from the plate roller 20 to the rotating shaft 60, reducing the material from flowing toward the rotating bearing 30 and damaging the rotating bearing 30. In addition, a residual material trough 401 is also provided on the rotating seal 40, which can store part of the material and guide the material back into the material box 10, further reducing the damage of the material to the bearing of the rotating shaft 60, improving the operating stability of the rotating bearing 30, extending the replacement cycle of the rotating bearing 30, and extending the service life of the pole piece coating device 1.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece coating device, characterized in that: include: A material box having a material storage cavity for storing materials; Rotating shaft; A plate roller is connected to the rotating shaft, and the circumferential edge of the plate roller extends into the material storage cavity. The plate roller rotates under the drive of the rotating shaft and removes the material from the material storage cavity; A rotating bearing is sleeved on the rotating shaft, the material box is connected to the rotating bearing, and the rotating bearing is used to rotatably connect the material box to the rotating shaft; A rotary seal is sleeved on the rotating shaft. The rotary seal is arranged between the rotating bearing and the plate roller. The rotary seal is recessed inwardly toward the inner wall of the rotating shaft to form a residual material groove.

2. The electrode coating device according to claim 1, characterized in that: The residual material groove is arranged circumferentially along the inner wall of the rotary seal to form an annular groove.

3. The electrode coating device according to claim 1 or 2, characterized in that: The outer wall of the rotating shaft is concave inwardly along the circumferential direction to form a reflux groove, and the reflux groove is arranged between the rotating seal and the rotating bearing. The reflux groove can guide the material in the residual material trough to the storage cavity.

4. The pole piece coating device according to claim 3, characterized in that: The pole piece coating device also includes a seal sleeved on the rotating shaft, the seal is arranged between the rotating bearing and the rotating seal, and the seal is sealingly connected to the rotating shaft.

5. The pole piece coating device according to claim 4, characterized in that: The sealing element comprises: A sealing ring, sleeved on the rotating shaft, the sealing ring is sealingly connected to the rotating shaft; The supporting sleeve is arranged outside the sealing ring.

6. The pole piece coating device according to claim 5, characterized in that: The sealing ring comprises: A body, sleeved outside the rotating shaft, the body is elastic, and the body and the rotating shaft are interference fit; The guide portion is formed by extending along the direction from the main body toward the rotating seal, and the cross-sectional area of ​​the guide portion gradually decreases along the direction from the main body toward the rotating seal.

7. The pole piece coating device according to claim 6, characterized in that: The reflux groove is arranged between the guide portion and the rotary seal.

8. The pole piece coating device according to any one of claims 4 to 7, characterized in that: The pole piece coating device further includes a scraper assembly, and the scraper assembly includes: A blade is arranged toward the circumferential edge of the plate roller, and the blade is used to scrape off part of the material on the plate roller; A telescopic component has one end arranged on the material box and the other end connected to the blade. The telescopic component can be telescoped and adjust the gap between the blade and the plate roller.

9. The pole piece coating device according to claim 8, characterized in that: The telescopic assembly comprises: A connecting rod, one end of which is hinged to the material box; A slider connected to an end of the connecting rod away from the material box; A guide rod is arranged on the material box, the guide rod extends radially along the plate roller, the slider is arranged on the guide rod and slides along the guide rod, the blade is connected to the slider, and the slider drives the blade to move radially along the plate roller.

10. The electrode coating device according to claim 9, characterized in that: The telescopic assembly also includes a driving motor. The end of the connecting rod is bent to form a connecting portion. The driving motor is connected to the connecting portion and drives the connecting rod to rotate relative to the material box.

11. The pole piece coating device according to claim 8, characterized in that: The electrode coating device also includes a pre-scraper, which is arranged in the material box, arranged toward the circumferential edge of the plate roller, and arranged upstream of the blade along the material conveying direction of the plate roller.

12. The electrode coating device according to claim 11, characterized in that: Part of the edge of the pre-scraper facing the plate roller protrudes toward the plate roller and extends to the end surface of the plate roller along the axial direction to form a side scraping portion, and the side scraping portion is used to scrape off the material on the end surface of the plate roller.

13. A battery manufacturing device, characterized in that: The battery manufacturing equipment includes a pole piece coating device as described in any one of claims 1-12.

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