Towing device, coating apparatus, and battery production line

Abstract

The application discloses a traction device, a coating equipment and a battery production line, wherein the traction device comprises at least one traction roller, a sealed chamber, a negative pressure piece, a driving piece, a smoothing piece and a fixing frame, the inside of the traction roller is a hollow structure, the surface of the traction roller is provided with a plurality of open holes in communication with the inside, and the two ends of the traction roller in the axial direction are both provided with airflow channels in communication with the inside, the sealed chamber is in communication with the airflow channels at the two ends of the traction roller, the negative pressure piece is in communication with the sealed chamber, the driving piece is connected with the traction roller, the sealed chamber is fixed to the fixing frame, and the smoothing piece is connected to the sealed chamber. The above-mentioned scheme provided by the application can make the negative pressure airflow uniformly distributed on the surface of the traction roller, so that the adsorption force received by each part of the pole piece is more uniform, the wrinkling damage of the pole piece during traction is avoided, and the traction stability is effectively improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a traction device, coating equipment and battery production line. Background Technology

[0002] In the battery production process, before the current electrode enters the winding needle, because the electrode travels too far in the winding direction, a traction device is needed to pull the electrode between the winding needle and the unwinding.

[0003] The traction device in the related technology is prone to causing wrinkling and damage to the electrode sheets during use. Utility Model Content

[0004] In view of the above problems, this application provides a traction device, coating equipment and battery production line, which can solve the problem that the electrode sheets are easily wrinkled and damaged when the existing traction device is used.

[0005] To solve the above-mentioned technical problems, this application proposes a traction device, comprising:

[0006] At least one traction roller, the interior of which is a hollow structure, the surface of which is provided with several openings communicating with the interior, and both ends of which along the axial direction are provided with airflow channels communicating with the interior.

[0007] A sealed chamber, wherein the sealed chamber is connected to the airflow channels at both ends of the traction roller;

[0008] A negative pressure component, which is connected to the sealed chamber;

[0009] A drive unit connected to the traction roller, the drive unit being configured to drive the traction roller to rotate about its axial direction;

[0010] It also includes a smoothing component and a fixing frame, the sealed chamber being fixed to the fixing frame, and the smoothing component being connected to the sealed chamber;

[0011] The smoothing element is adapted to the traction roller, and when the electrode is adsorbed onto the surface of the traction roller, the smoothing element is configured to smooth the tabs on the electrode.

[0012] In the technical solution of this application embodiment, the electrode sheet is adsorbed onto the surface of the traction roller for conveying by negative pressure adsorption. Compared with traditional mechanical clamping traction, this avoids the problems of electrode sheet breakage due to excessive clamping force and electrode sheet slippage due to insufficient clamping force. Since airflow channels and sealed chambers are provided at both ends of the traction roller along the axial direction, the negative pressure airflow can be evenly distributed on the surface of the traction roller, thereby ensuring that the adsorption force on each part of the electrode sheet is more uniform, preventing wrinkling damage during traction, and effectively improving traction stability. Simultaneously, during the electrode sheet traction process, the tabs on the electrode sheet are smoothed by a smoothing component to ensure that the tabs adhere to the electrode sheet surface, preventing subsequent process failures caused by tab warping, thereby improving the electrode sheet production quality.

[0013] In some embodiments, one end of the smoothing member is provided with a guide portion, which is bent toward the side away from the surface of the traction roller.

[0014] In this way, the inclined transition design of the guide section can smooth out the scratches on the tabs at the end of the component, reducing the risk of tab breakage and deformation. Moreover, the guide section can smoothly guide the tabs into the smoothing area, ensuring that the tabs can be accurately and completely smoothed, avoiding the tabs from not being smoothed due to misalignment, thereby improving the smoothing effect.

[0015] In some embodiments, the smoothing member is arranged parallel to the axis of the traction roller.

[0016] This ensures that the tabs are evenly stressed between the smoothing component and the traction roller, preventing deformation such as bending or twisting due to excessive local stress.

[0017] In some embodiments, one end of the traction roller is provided with a clearance portion, the diameter of which is smaller than the diameter of the traction roller;

[0018] A clearance channel for the insertion of the electrode tab is formed between the smoothing component and the clearance portion.

[0019] In this way, by setting up the clearance section, the electrode tab can be accommodated within the clearance channel, preventing the electrode tab from being squeezed by the gap between the smoothing component and the traction roller body, thus preventing damage or crushing of the electrode tab. Moreover, the clearance channel can limit the electrode tab, ensuring that the electrode tab is always within the effective range of the smoothing component, preventing the electrode tab from shifting and becoming unsmoothable.

[0020] In some embodiments, the surface of the avoidance portion is provided with a smooth coating.

[0021] This reduces friction between the tab and the clearance part, preventing scratches and wear on the tab surface.

[0022] In some embodiments, the clearance portion extends along the axial direction of the traction roller, and the axial dimension of the clearance channel is adapted to the axial dimension of the electrode tab.

[0023] This ensures that the entire tab is within the smoothing element's effective range, preventing the tab ends from being left unsmoothed and thus improving the smoothing effect.

[0024] In some embodiments, the smoothing element is detachably connected to the sealed chamber.

[0025] This facilitates the replacement, repair, and cleaning of the smoothing components, reducing maintenance difficulty and time, and improving the overall maintenance efficiency of the device. Furthermore, when the smoothing components wear out or become damaged, it is not necessary to replace the entire sealed chamber or traction device; only the corresponding smoothing component needs to be replaced, effectively reducing maintenance costs.

[0026] In some embodiments, the traction device further includes an adjustment assembly connected to the smoothing member, the adjustment assembly being configured to adjust the distance between the smoothing member and the traction roller.

[0027] This allows for precise adjustment of the distance between the smoothing component and the traction roller based on the specifications of the electrode sheet and tabs, adapting to different production needs. Furthermore, by adjusting the position of the smoothing component, the smoothing force exerted by the component on the tabs can be controlled, preventing excessive smoothing force from damaging the tabs or insufficient smoothing force from failing to smooth them, thus ensuring a stable and reliable smoothing effect.

[0028] In some embodiments, the smoothing member has a flexible layer on the side facing the traction roller.

[0029] This avoids rigid contact between the smoothing part and the tab, preventing damage or indentation to the tab.

[0030] In some embodiments, the openings are evenly distributed on the surface of the traction roller.

[0031] This ensures that the adsorption force on all parts of the electrode is uniform, preventing electrode breakage, slippage, and displacement caused by uneven local force, thus improving traction stability. At the same time, the uniform adsorption force allows the electrode to be smoothly adsorbed onto the surface of the traction roller, preventing wrinkles from forming on the electrode.

[0032] In some embodiments, the traction device includes at least two traction rollers, wherein the at least two traction rollers are a first roller body and a second roller body, respectively;

[0033] It also includes a transmission assembly, a first meshing component, and a second meshing component;

[0034] The first meshing member and the second meshing member mesh, and the second meshing member is connected to the first roller body in a driving connection;

[0035] The driving component is connected to the first meshing component through the transmission assembly, and the transmission assembly is connected to the second roller body in a transmission connection.

[0036] Under the condition that the drive unit drives the transmission assembly to rotate, the first roller and the second roller rotate in opposite directions.

[0037] In this way, by adjusting the rotation speed, spacing, and adsorption force of the two rollers, it is possible to adapt to electrode sheets of different thicknesses and weights, further expanding the applicability of the overall device.

[0038] This application also proposes a coating apparatus, including a traction device as described in any one of the embodiments of this application.

[0039] This application also proposes a battery production line, including coating equipment as described in the embodiments of this application.

[0040] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of a traction device provided in some embodiments of this application;

[0043] Figure 2 for Figure 1 Enlarged diagram of point A in the diagram;

[0044] Figure 3 Schematic diagram of traction rollers provided for some embodiments of this application;

[0045] Figure 4 This application provides schematic diagrams illustrating the interaction between a traction device and an electrode plate in some embodiments.

[0046] Figure 5 This is a schematic diagram illustrating the cooperation between two traction devices and electrode plates provided in some embodiments of this application;

[0047] Figure 6 for Figure 5 Side view;

[0048] Figure 7 for Figure 6 A diagram from another perspective;

[0049] Figure 8 for Figure 6 A diagram from another perspective;

[0050] Figure 9 This is a schematic diagram illustrating the cooperation between three traction devices and electrode plates provided in some embodiments of this application;

[0051] Figure 10 This is a schematic diagram showing the four traction devices and electrode plates provided in some embodiments of this application.

[0052] The reference numerals in the detailed embodiments are as follows:

[0053] 10. Traction roller; 101. Opening; 102. Airflow channel; 103. Clearance part; 104. Rotating shaft; 20. Sealed chamber; 201. First vacuum chamber; 202. Second vacuum chamber; 30. Pipe; 301. First guide tube; 302. Second guide tube; 40. Smoothing part; 401. Guide part; 50. Fixing frame; 501. Support plate; 60. Driving component; 70. Coupling; 80. Mounting base; 90. Fixing plate;

[0054] 11. Electrode; 111. Electrode tab; 12. Transmission assembly; 121. First pulley; 122. Second pulley; 123. Third pulley; 124. Belt; 13. First meshing element; 14. Second meshing element. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0058] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0059] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0061] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0063] In the battery production process, current fast-charging products and future sodium battery production are gradually becoming the mainstream. These products usually make the electrode sheets thinner than conventional electrode sheets to increase the reaction area. In particular, the negative electrode sheets selected for current sodium battery production are even thinner.

[0064] Thus, various problems arise in the current process of winding and forming wound battery modules on a winding machine. For example, before the electrode enters the winding needle, due to the excessive length of the electrode's travel direction, a traction device is needed to pull the electrode between the winding needle and the unwinding.

[0065] However, most of the traction devices in related technologies are pressure roller structures, which can easily cause wrinkling damage to the electrode sheets during the tension replenishment process.

[0066] Based on the above considerations, in order to solve the problem that existing traction devices are prone to wrinkling and damage to the electrode sheets during use, this application designs a traction device. The traction device includes at least one traction roller, a sealed chamber, a negative pressure component, a driving component, a smoothing component, and a fixing frame. The traction roller has a hollow internal structure, and its surface is provided with several openings communicating with the interior. Both ends of the traction roller along the axial direction are provided with airflow channels communicating with the interior. The sealed chamber is connected to the airflow channels at both ends of the traction roller. The negative pressure component is connected to the sealed chamber. The driving component is connected to the traction roller and is configured to drive the traction roller to rotate around its axial direction. The sealed chamber is fixed to the fixing frame. The smoothing component is connected to the sealed chamber. The smoothing component is adapted to the traction roller. When the electrode sheet is adsorbed onto the surface of the traction roller, the smoothing component is configured to smooth the tabs on the electrode sheet.

[0067] In the technical solution of this application embodiment, the electrode sheet is adsorbed onto the surface of the traction roller for conveying by negative pressure adsorption. Compared with traditional mechanical clamping traction, this avoids the problems of electrode sheet breakage due to excessive clamping force and electrode sheet slippage due to insufficient clamping force. Since airflow channels and sealed chambers are provided at both ends of the traction roller along the axial direction, the negative pressure airflow can be evenly distributed on the surface of the traction roller, thereby ensuring that the adsorption force on each part of the electrode sheet is more uniform, preventing wrinkling damage during traction, and effectively improving traction stability. Simultaneously, during the electrode sheet traction process, the tabs on the electrode sheet are smoothed by a smoothing component to ensure that the tabs adhere to the electrode sheet surface, preventing subsequent process failures caused by tab warping, thereby improving the electrode sheet production quality.

[0068] According to some embodiments of this application, such as Figure 1 and combined Figure 3 , Figure 4As shown, this application provides a traction device, which includes at least one traction roller 10, a sealed chamber 20, a negative pressure member, a driving member 60, a smoothing member 40, and a fixing frame 50. The traction roller 10 has a hollow interior structure, and its surface is provided with a plurality of openings 101 communicating with the interior. Both ends of the traction roller 10 along the axial direction are provided with airflow channels 102 communicating with the interior. The sealed chamber 20 is connected to the airflow channels 102 at both ends of the traction roller 10. The negative pressure member is connected to the sealed chamber 20. The driving member 60 is connected to the traction roller 10 and is configured to drive the traction roller 10 to rotate around its axial direction. The sealed chamber 20 is fixed to the fixing frame 50. The smoothing member 40 is connected to the sealed chamber 20. The smoothing member 40 is adapted to the traction roller 10. When the electrode 11 is adsorbed onto the surface of the traction roller 10, the smoothing member 40 is configured to smooth the tabs 111 on the electrode 11.

[0069] This embodiment may include one or two equal traction rollers 10, and the specific ones can be determined according to the actual situation. This specification does not limit this embodiment.

[0070] The traction roller 10 in this embodiment serves as the actuator for electrode traction. It features a hollow structure design with an airflow-accommodating space inside, ensuring that the negative pressure airflow can be evenly distributed within the traction roller 10.

[0071] The surface of the traction roller 10 is machined with several openings 101. All openings 101 are fully connected to the hollow structure inside the traction roller 10. At the same time, the diameter, number and distribution of the openings 101 can be adapted and adjusted according to the material and thickness of the traction electrode. For example, when the electrode is being tractioned, the opening diameter can be set to 0.5mm-2mm to avoid the electrode being damaged due to excessively large opening diameter, and the adsorption force being affected by excessively small opening diameter. Meanwhile, both ends of the traction roller 10 along its own axial direction are integrally formed or sealed with airflow channels 102. One end of the airflow channel 102 is connected to the hollow interior of the traction roller 10, and the other end extends into the sealed chamber 20, forming the only channel for airflow. This ensures that the negative pressure airflow can enter the interior of the traction roller 10 through the airflow channel 102 and then act on the surface of the electrode through the openings 101.

[0072] In this embodiment, the sealed chamber 20 can be made of materials with good sealing performance, such as stainless steel or engineering plastics, and its interior is a sealed space. (Reference) Figure 1 As shown, the sealed chamber 20 may include two separate first vacuum chambers 201 and second vacuum chambers 202. The first vacuum chamber 201 is connected to the airflow channel 102 at the left end of the traction roller 10, and is also connected to the negative pressure component through the first conduit 301 in the pipe 30. The second vacuum chamber 202 is connected to the airflow channel 102 at the right end of the traction roller 10, and is also connected to the negative pressure component through the second conduit 302 in the pipe 30.

[0073] In this embodiment, the first vacuum chamber 201 can contact the left end of the traction roller 10; however, there is no fixed connection between the first vacuum chamber 201 and the traction roller 10. The first vacuum chamber 201 is fixed, while the traction roller 10 can rotate relative to the first vacuum chamber 201. The cooperation structure between the second vacuum chamber 202 and the traction roller 10 can refer to the cooperation structure between the first vacuum chamber 201 and the traction roller 10, and will not be described again here.

[0074] When in use, after the negative pressure component acts on the first vacuum chamber 201 and the second vacuum chamber 202, the negative pressure acting on the electrode 11 through the opening 101 only covers the area between the electrode 11 and the traction roller 10. That is, the other areas of the traction roller 10 do not generate negative pressure. In this way, when the traction roller 10 rotates, it can drive the electrode 11.

[0075] The negative pressure component in this embodiment can be a vacuum pump, a negative pressure fan, or other equipment, and is not limited here.

[0076] In this embodiment, the driving component 60 can be a servo motor, stepper motor, etc., and is not limited here. (See reference...) Figure 1 and combined Figure 3 As shown, the output shaft of the drive unit 60 can be connected to the rotating shaft 104 on the traction roller 10 via a coupling 70. The drive unit 60 can adjust its speed according to traction requirements, thereby driving the traction roller 10 to rotate at a constant speed around its own axis. Since the electrode portion is adsorbed onto the surface of the traction roller 10, the electrode will move synchronously when the traction roller 10 rotates.

[0077] In this embodiment, the mounting frame 50 serves as the installation base for the entire device and can be made of high-strength materials such as aluminum alloy or stainless steel. The mounting frame 50 integrates a support plate 501, and both the first vacuum chamber 201 and the second vacuum chamber 202 can be snapped onto the corresponding support plate 501, thereby ensuring the installation stability of components such as the first vacuum chamber 201 and the second vacuum chamber 202 and preventing shaking during traction.

[0078] In this embodiment, the smoothing member 40 can be made of a rigid material such as stainless steel sheet or engineering plastic sheet, and its shape is adapted to the surface curvature of the traction roller 10. That is, the side of the smoothing member 40 facing the traction roller 10 is an arc-shaped surface. At the same time, the smoothing member 40 forms a small gap with the surface of the traction roller so that the tabs 111 on the electrode sheet 11 can pass through.

[0079] In the technical solution of this application embodiment, the electrode 11 is adsorbed onto the surface of the traction roller 10 for conveying by negative pressure adsorption. Compared with traditional mechanical clamping traction, this avoids the problems of excessive clamping force causing damage to the electrode 11 and insufficient clamping force causing slippage of the electrode 11. Since airflow channels 102 and sealed chambers 20 are provided at both ends of the traction roller 10 along the axial direction, the negative pressure airflow can be evenly distributed on the surface of the traction roller 10, thereby ensuring that the adsorption force on each part of the electrode 11 is more uniform, avoiding wrinkling damage during traction, and effectively improving traction stability.

[0080] Meanwhile, when the electrode 11 is adsorbed onto the surface of the traction roller 10 by negative pressure and rotates with the traction roller 10, the tabs 111 on the electrode 11 may be raised or bent. At this time, the flattening part 40 flattens the tabs 111 on the electrode 11 to ensure that the tabs 111 are in contact with the surface of the electrode 11, thereby avoiding subsequent process failures caused by the tabs 111 being raised, and thus improving the production quality of the electrode 11.

[0081] According to some embodiments of this application, such as Figure 2 As shown, one end of the smoothing member 40 is provided with a guide portion 401, which is bent toward the side away from the surface of the traction roller 10.

[0082] In this embodiment, the guide part 401 can be integrally formed with the smoothing part 40 or fixed by welding or bolt connection, which is not limited here.

[0083] refer to Figure 2 As shown, the guide portion 401 is located at the end of the smoothing member 40 near the entry of the electrode 11, that is, at the front end of the electrode 11 in the direction of travel. The guide portion 401 is bent toward the side away from the surface of the traction roller 10, and the bending angle can be between 15° and 45°. The bent guide portion 401 forms a smooth transition surface, avoiding sharp edges.

[0084] When electrode 11 is along as Figure 4 The arrow in the middle rotates with the traction roller 10. When the tab 111 is about to contact the smoothing part 40, the guide part 401 contacts the tab 111 first.

[0085] Since the guide section 401 is inclined and transitional, it guides the tab 111 to smoothly enter the gap between the smoothing member 40 and the traction roller 10, preventing the tab 111 from being scratched by the end of the smoothing member 40. At the same time, the guide section 401 can smoothly guide the tab 111 into the smoothing area, thereby ensuring that the tab 111 can be smoothed accurately and completely, preventing the tab 111 from being unable to be smoothed due to misalignment, and thus improving the smoothing effect.

[0086] According to some embodiments of this application, the smoothing member 40 is arranged parallel to the axis of the traction roller 10.

[0087] In this embodiment, the axis of the traction roller 10 is its central axis of rotation around itself, and the length direction of the smoothing member 40 is completely parallel to this axis, that is, the two ends of the smoothing member 40 correspond to the two ends of the traction roller 10 in the axial direction.

[0088] This ensures that the tab 111 is evenly stressed between the smoothing component 40 and the traction roller 10, preventing the tab 111 from bending, twisting, or deforming due to excessive local stress.

[0089] According to some embodiments of this application, such as Figure 3 As shown, one end of the traction roller 10 is provided with a clearance part 103. The diameter of the clearance part 103 is smaller than the diameter of the traction roller 10. A clearance channel for the electrode tab 111 to pass through is formed between the smoothing member 40 and the clearance part 103.

[0090] In this embodiment, the avoidance part 103 can be integrally formed with the traction roller 10 or fixed by welding or keying; no limitation is made here.

[0091] In this embodiment, reference Figure 3 As shown, the clearance part 103 is located at the left end of the traction roller 10. The diameter of the clearance part 103 is smaller than the main body diameter of the traction roller 10. For example, the diameter of the clearance part 103 is 0.5 mm or 1 mm smaller than the main body diameter of the traction roller 10. In this case, a step-like structure is formed between the clearance part 103 and the traction roller 10.

[0092] refer to Figure 3 and combined Figure 4 As shown, the smoothing part 40 is installed above the avoidance part 103. Since the diameter of the avoidance part 103 is smaller than the main body diameter of the traction roller 10, a gap will be formed between the smoothing part 40 and the avoidance part 103. This gap is the avoidance channel for the electrode tab 111 to pass through.

[0093] The height of the clearance channel, i.e. the gap between the smoothing part 40 and the surface of the clearance part 103, is slightly greater than the thickness of the tab 111. Usually, this gap is 0.1mm-0.3mm greater than the thickness of the tab. This not only ensures that the tab 111 can pass through smoothly, but also allows the smoothing part 40 to press the tab 111 slightly to achieve a smoothing effect.

[0094] According to some embodiments of this application, the surface of the avoidance portion 103 is provided with a smooth coating.

[0095] The smooth coating in this embodiment can be made of a wear-resistant, low-friction material, such as a polytetrafluoroethylene (PTFE) coating or a ceramic coating, etc., and is not limited here. The smooth coating can be uniformly applied to the entire surface of the clearance part 103 through processes such as spraying or electroplating.

[0096] During use, by providing a smooth coating on the surface of the clearance portion 103, the friction between the tab 111 and the clearance portion 103 can be reduced, thus preventing scratches and wear on the surface of the tab 111.

[0097] According to some embodiments of this application, the clearance portion 103 extends along the axial direction of the traction roller 10, and the axial dimension of the clearance channel is adapted to the axial dimension of the tab 111.

[0098] In this embodiment, the avoidance part 103 extends along the axial direction of the traction roller 10, and its extension length (i.e., the axial dimension of the avoidance part) deviates from the length of the tab 111 along the axial direction of the traction roller 10 by no more than ±0.5mm. This ensures that the tab 111 as a whole is within the effective range of the smoothing member 40, preventing the end of the tab 111 from being unsmoothed, thereby improving the smoothing effect.

[0099] According to some embodiments of this application, the smoothing member 40 is detachably connected to the sealing chamber 20.

[0100] In this embodiment, the smoothing component 40 and the sealing chamber 20 can be connected by bolts, snap-fit ​​connections, slot connections, or other structures, which are not limited here.

[0101] This facilitates the replacement, repair, and cleaning of the smoothing component 40, reducing maintenance difficulty and time, and improving the overall maintenance efficiency of the device. Furthermore, when the smoothing component 40 wears or is damaged, it is not necessary to replace the entire sealed chamber 20 or the traction device; only the corresponding smoothing component 40 needs to be replaced, effectively reducing maintenance costs.

[0102] According to some embodiments of this application, the traction device further includes an adjustment component connected to the smoothing member 40, the adjustment component being configured to adjust the distance between the smoothing member 40 and the traction roller 10.

[0103] The adjustment components in this embodiment may include electric telescopic rods, pneumatic rods, etc., and are not limited here.

[0104] During use, the distance between the smoothing component 40 and the traction roller 10 can be precisely adjusted according to the specifications of the electrode sheet 11 and the tab 111 to adapt to different production needs. Moreover, by adjusting the position of the smoothing component 40, the smoothing force of the smoothing component 40 on the tab 111 can also be controlled, avoiding excessive smoothing force that may cause damage to the tab 111, or insufficient smoothing force that may fail to smooth the tab 111, thus ensuring a stable and reliable smoothing effect.

[0105] According to some embodiments of this application, the smoothing member 40 has a flexible layer on the side facing the traction roller 10.

[0106] The flexible layer in this embodiment can be made of a soft, wear-resistant, and non-adhesive material, such as silicone, rubber, polyurethane, etc., and is not limited here.

[0107] In this embodiment, the flexible layer can be fixed to the surface of the smoothing part 40 facing the traction roller 10 by means of bonding, vulcanization, etc., thereby ensuring that the flexible layer is firmly bonded to the smoothing part 40 and is not easy to fall off, and the surface of the flexible layer is flat and smooth, without protrusions or wrinkles.

[0108] When the tab 111 enters the gap between the smoothing part 40 and the relief part 103 during use, since the surface of the smoothing part 40 is provided with a flexible layer, rigid contact between the smoothing part 40 and the tab 111 can be avoided, thus preventing damage or indentation to the tab 111.

[0109] According to some embodiments of this application, the surface of the traction roller 10 has openings 101 evenly distributed.

[0110] In this embodiment, the openings 101 on the surface of the traction roller 10 can be distributed in a matrix (or uniformly distributed in a ring). The center distance between two adjacent openings 101 is equal. At the same time, the aperture size of all openings 101 is the same, ensuring that the density of openings 101 in all parts of the surface of the traction roller 10 is the same.

[0111] This ensures that the adsorption force on all parts of the electrode 11 is uniform, preventing damage, slippage, and displacement of the electrode 11 caused by uneven local force, and improving traction stability. At the same time, the uniform adsorption force allows the electrode 11 to be smoothly adsorbed onto the surface of the traction roller 10, preventing wrinkles from forming on the electrode 11.

[0112] According to some embodiments of this application, such as Figure 5 and combined Figure 6 , Figure 7 , Figure 8 As shown, the traction device includes at least two traction rollers 10, which are respectively a first roller body and a second roller body; the traction device also includes a transmission assembly 12, a first meshing member 13, and a second meshing member 14; wherein, the first meshing member 13 and the second meshing member 14 mesh, and the second meshing member 14 is drivenly connected to the first roller body; the driving member 60 is connected to the first meshing member 13 through the transmission assembly 12, and the transmission assembly 12 is drivenly connected to the second roller body; under the condition that the driving member 60 drives the transmission assembly 12 to rotate, the first roller body and the second roller body rotate in opposite directions.

[0113] refer to Figure 9 , Figure 10 As shown, this embodiment may include two, three, four, or other traction rollers 10, but no limitation is made here.

[0114] In this embodiment, the drive component 60 is fixed to the fixing plate 90 by the mounting base 80. The structure of the first roller and the second roller in this embodiment is the same as the structure of the traction roller 10 described above, and will not be repeated here.

[0115] In this embodiment, the first meshing member 13 and the second meshing member 14 can both be gears, the two gears mesh with each other, and the second meshing member 14 can be connected to one end of the first roller body by means of key connection, welding or other methods.

[0116] The transmission assembly 12 in this embodiment may include a first pulley 121, a second pulley 122, a third pulley 123, and a belt 124. The output shaft of the drive member 60 is connected to the first pulley 121. The second pulley 122 passes through the fixed plate 90 and is connected to the second roller body for transmission. The third pulley 123 is rotatably connected to the side of the fixed plate 90 facing the drive member 60 through a bearing. At the same time, the first meshing member 13 is coaxially connected to the third pulley 123. The first pulley 121, the second pulley 122, and the third pulley 123 are wound with corresponding belts 124.

[0117] When the drive unit 60 drives the first pulley 121 to rotate, the first pulley 121 drives the second pulley 122 and the third pulley 123 to rotate via the belt 124. At this time, the second pulley 122 can drive the second roller to rotate. Simultaneously, the third pulley 123 synchronously drives the first meshing member 13 to rotate. Since the first meshing member 13 is engaged with the second meshing member 14, the rotation of the first meshing member 13 can drive the second meshing member 14 to rotate in the opposite direction. At this time, the second meshing member 14 can drive the corresponding first roller to rotate in the opposite direction, thereby realizing that the first roller and the second roller rotate in different directions.

[0118] In this way, by adjusting the rotation speed, spacing, and adsorption force of the two rollers, it is possible to adapt to electrode sheets of different thicknesses and weights, further expanding the applicability of the overall device.

[0119] This application also proposes a coating apparatus, including a traction device as described in any of the embodiments of this application.

[0120] The specific structure of the traction device in this embodiment refers to the above embodiments. Since the coating equipment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0121] This application also proposes a battery production line, including coating equipment as described in the embodiments of this application.

[0122] The coating equipment in this embodiment has the same structure as the above embodiments. Since the battery production line adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A traction device, characterized in that, include: At least one traction roller, the interior of which is a hollow structure, the surface of which is provided with several openings communicating with the interior, and both ends of which along the axial direction are provided with airflow channels communicating with the interior. A sealed chamber, wherein the sealed chamber is connected to the airflow channels at both ends of the traction roller; A negative pressure component, which is connected to the sealed chamber; A drive unit connected to the traction roller, the drive unit being configured to drive the traction roller to rotate about its axial direction; It also includes a smoothing component and a fixing frame, the sealed chamber being fixed to the fixing frame, and the smoothing component being connected to the sealed chamber; The smoothing element is adapted to the traction roller, and when the electrode is adsorbed onto the surface of the traction roller, the smoothing element is configured to smooth the tabs on the electrode.

2. The traction device according to claim 1, characterized in that, One end of the smoothing component is provided with a guide portion, which is bent toward the side away from the surface of the traction roller.

3. The traction device according to claim 1, characterized in that, The smoothing component is arranged parallel to the axis of the traction roller.

4. The traction device according to claim 1, characterized in that, One end of the traction roller is provided with a clearance part, the diameter of which is smaller than the diameter of the traction roller; A clearance channel for the insertion of the electrode tab is formed between the smoothing component and the clearance portion.

5. The traction device according to claim 4, characterized in that, The surface of the avoidance part is provided with a smooth coating.

6. The traction device according to claim 4, characterized in that, The clearance portion extends along the axial direction of the traction roller, and the axial dimension of the clearance channel is adapted to the axial dimension of the electrode tab.

7. The traction device according to any one of claims 1 to 6, characterized in that, The smoothing component is detachably connected to the sealed chamber.

8. The traction device according to any one of claims 1 to 6, characterized in that, The traction device further includes an adjustment component connected to the smoothing member, the adjustment component being configured to adjust the distance between the smoothing member and the traction roller.

9. The traction device according to any one of claims 1 to 6, characterized in that, The smoothing component has a flexible layer on the side facing the traction roller.

10. The traction device according to any one of claims 1 to 6, characterized in that, The openings are evenly distributed on the surface of the traction roller.

11. The traction device according to claim 1, characterized in that, The traction device includes at least two traction rollers, which are a first roller body and a second roller body, respectively. It also includes a transmission assembly, a first meshing component, and a second meshing component; The first meshing member and the second meshing member mesh, and the second meshing member is connected to the first roller body in a driving connection; The driving component is connected to the first meshing component through the transmission assembly, and the transmission assembly is connected to the second roller body in a transmission connection. Under the condition that the drive unit drives the transmission assembly to rotate, the first roller and the second roller rotate in opposite directions.

12. A coating apparatus, characterized in that, Includes the traction device as described in any one of claims 1 to 11.

13. A battery production line, characterized in that, Includes the coating apparatus as described in claim 12.

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