Battery pole piece flattening device

Abstract

This application relates to a battery electrode leveling device, including a frame, a leveling adjustment mechanism, a cooling and curing mechanism, and a controller. A transverse guide bracket and a placement seat are mounted on the frame. The frame has a transverse guide groove, within which a sliding connecting strip is slidably installed. The sliding connecting strip is simultaneously slidably installed on the transverse guide bracket. A support block is mounted at the bottom of the placement seat, and an adjusting screw is rotatably installed within the support block. A threaded rod is threaded onto the adjusting screw and fixedly installed on the sliding connecting strip. The leveling adjustment mechanism is fixedly installed on the sliding connecting strip, and the cooling and curing mechanism is fixedly installed on the leveling adjustment mechanism. This application utilizes a dual-guide structure formed by the transverse guide groove and the transverse guide bracket, combined with screw transmission, to achieve transverse movement. The leveling spacing is adjusted through an electric lifting rod in conjunction with the lifting guide groove and guide slider. An integrated air-cooling curing mechanism cools and cures the leveled electrode.

Description

Technical Field

[0001] This application relates to the field of secondary battery manufacturing technology, and in particular to a battery electrode leveling device. Background Technology

[0002] In the electrode coating process of secondary batteries, the smoothness and curing efficiency of the electrode coating directly affect the battery capacity consistency, cycle life, and safety performance. In recent years, the industry has made improvements and optimizations to coating equipment. For example, coating equipment has introduced scraper structures to push the coating to both sides of the electrode to enhance the coating effect, or tension wheels have been used to adjust the electrode tension and prevent breakage, addressing the issue of uneven electrode surfaces after coating. Furthermore, narrow-slit coating technology is continuously improving coating precision. However, the technological development in the leveling stage is relatively lagging. Most existing equipment uses a fixed roller gap structure for leveling mechanisms, with a fixed roller distance. This can only smooth out some local defects and cannot achieve comprehensive leveling, and the leveling range is limited. When it is necessary to adjust the leveling gap, simple methods such as shims or manual bolts are usually used for intermittent adjustments. The operation process is cumbersome, the adjustment accuracy is difficult to guarantee, and it cannot flexibly adapt to the production needs of positive and negative electrode sheets of different thicknesses and widths.

[0003] Meanwhile, most existing coating and leveling devices lack integrated rapid curing mechanisms. After leveling, the electrode remains in a wet or semi-dry film state, making it prone to springback or deformation during transport and traction, leading to leveling failure. To overcome this problem, production lines often require additional independent curing equipment such as ovens. However, independent curing equipment not only increases production line length and equipment costs but also leads to poor coordination between leveling and curing processes, reducing continuous production efficiency. Furthermore, the temperature and airflow control of the oven can be unstable, potentially causing the electrode to be too dry or too wet, thus affecting electrode quality. Therefore, it is necessary to provide an electrode coating and leveling device with convenient leveling spacing adjustment and integrated curing functions. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of existing lithium electrode sheet coating and leveling equipment, such as inconvenient leveling spacing adjustment, low adjustment accuracy, and poor adaptability to different specifications of electrode sheets. It also addresses the problems of existing devices lacking an integrated rapid air-cooling curing structure, easy springback deformation of the electrode sheet after leveling, powder sticking to the rollers, and low process connection efficiency. The aim is to provide a lithium electrode sheet coating and leveling device that is compact, easy to adjust, has high leveling accuracy, and fast curing speed. This objective is achieved through the following technical solutions: The battery electrode leveling device of this application includes a frame, a leveling and adjusting mechanism, a cooling and curing mechanism, and a controller; The frame is provided with a transverse guide groove, and a sliding connecting strip is slidably installed in the transverse guide groove. The sliding connecting strip is slidably installed on the transverse guide bracket. The screw is fixedly installed on the sliding connecting strip. A leveling and adjusting mechanism is fixedly installed on the sliding connecting strip. A cooling and curing mechanism is fixedly installed on the leveling and adjusting mechanism. A transverse guide bracket is fixedly installed on the frame, a placement seat is fixedly installed on the transverse guide bracket, a support block is fixedly installed at the bottom of the placement seat, an adjusting screw is rotatably installed inside the support block, and a threaded rod is threaded onto the adjusting screw. The controller is fixedly installed on the cooling and curing mechanism or the leveling and adjusting mechanism.

[0005] In one embodiment, a first drive motor is fixedly installed at the bottom of the placement seat, and the adjusting screw is coaxially fixedly installed at the output end of the first drive motor.

[0006] In one embodiment, the leveling adjustment mechanism includes a leveling mounting frame fixedly mounted on a sliding connecting bar, and a lifting adjustment block is slidably mounted inside the leveling mounting frame.

[0007] In one embodiment, a lifting rod is fixedly installed on the cooling and curing mechanism, a first connecting rod is fixedly installed at the output end of the lifting rod, a second connecting rod is fixedly installed at the bottom of the first connecting rod, and a leveling pressure plate is fixedly installed at the bottom of the lifting adjustment block.

[0008] In one embodiment, the leveling mounting frame has a lifting guide groove, and a guide slider is fixedly installed on the side of the lifting adjustment block near the lifting guide groove. The guide slider is slidably installed in the lifting guide groove.

[0009] In one embodiment, the cooling and curing mechanism includes an air-cooled mounting box fixedly mounted on a lifting adjustment block, a lifting rod fixedly mounted on the upper surface of the air-cooled mounting box, a second drive motor fixedly mounted on the upper surface of the air-cooled mounting box, an air-cooled impeller shaft coaxially mounted on the output end of the second drive motor, and an air-cooled impeller fixedly mounted on the air-cooled impeller shaft.

[0010] In one embodiment, an air distribution nozzle is fixedly installed at the bottom of the air-cooled mounting box, and an air inlet is provided on the air-cooled mounting box.

[0011] In one embodiment, the lifting rod is operated by a pneumatic cylinder, an electric push rod, or a hydraulic cylinder.

[0012] In one embodiment, lateral movement is achieved by using a synchronous belt, rack and pinion, or cylinder drive for transmission.

[0013] In one embodiment, the cooling and curing mechanism is a vortex fan or a semiconductor refrigeration chip.

[0014] Compared with the prior art, this application has the following beneficial effects: This application utilizes an electric lifting rod to power a lifting adjustment block that slides up and down within the leveling mounting frame, achieving electrically adjustable leveling spacing. Compared to the intermittent adjustments in existing technologies that rely on simple methods such as shims and manual bolts, this application achieves continuous adjustability of the leveling spacing through electric lifting, adapting to the production needs of positive and negative electrode sheets of different thicknesses and widths. Simultaneously, a guide slider on one side of the lifting adjustment block slides in conjunction with a lifting guide groove inside the leveling mounting frame, providing guidance and preventing deviation, resulting in a smoother movement trajectory of the lifting adjustment block during lifting and ensuring consistent leveling spacing adjustment.

[0015] This application features a transverse guide bracket fixedly mounted on a frame, with a transverse guide groove formed on the frame. A sliding connecting strip is simultaneously slidably installed within both the transverse guide bracket and the transverse guide groove, forming a double-guide structure. A first drive motor drives an adjusting screw to rotate, causing a threaded rod connected to the adjusting screw to move linearly along the screw's axial direction, thereby synchronously displacing the sliding connecting strip. The double-guide structure further constrains the movement direction of the sliding connecting strip based on the screw drive, reducing swaying and wobble during transverse movement, allowing the leveling plate to move smoothly along a set trajectory, thus applying a more uniform leveling pressure to the electrode surface.

[0016] After the electrode is leveled, the second drive motor is activated to rotate the air-cooled impeller at high speed. The generated airflow is evenly blown onto the electrode surface through the uniform air outlet nozzles. This air-cooled curing method rapidly cools the wet or semi-dry film coating after the leveling process, preventing the electrode from rebounding or deforming due to the coating's high fluidity during subsequent transport. By integrating the air-cooled curing function into the leveling device, the leveling and curing processes are seamlessly connected, helping to reduce the risk of leveling failure caused by coating flow during electrode transport. Simultaneously, the uniform air outlet nozzles at the bottom of the air-cooled mounting box ensure that the airflow evenly covers the electrode surface, avoiding inconsistent curing caused by uneven local airflow.

[0017] Most existing coating and leveling devices lack an integrated rapid curing mechanism. After leveling, the electrode sheets still need to be transported to independent curing equipment such as ovens for curing, which not only increases production line length and equipment costs but also easily leads to poor coordination between the leveling and curing processes. This application directly installs the air-cooled curing mechanism on the leveling adjustment mechanism, so that the leveling pressure plate and the air distribution nozzle move synchronously with the leveling adjustment mechanism. Leveling and curing are completed continuously at the same station, eliminating the intermediate transportation link. The integrated structural design helps reduce the equipment footprint and production costs, while also reducing the transportation distance of the electrode sheets during process changes, and reducing the risk of coating scratches or deformation caused by external forces during transportation.

[0018] This application achieves continuous adjustment of the leveling spacing through an electric lifting and adjusting mechanism, and flexible control of the lateral movement stroke through a screw drive and a dual-guide structure, enabling the device to adapt to the production of positive and negative electrode sheets of different thicknesses and widths. The leveling mechanism employing adaptive spacing adjustment effectively levels the battery components, resulting in high applicability and improved production efficiency. Based on the above structure, this application also provides a controller for real-time monitoring and adjustment of process parameters such as leveling spacing and air cooling intensity, further enhancing the device's process adaptability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the battery electrode leveling device of this application from the upper side angle. Figure 2 This is a schematic diagram of the battery electrode leveling device of this application from the lower side angle. Figure 3 This is a schematic diagram of the battery electrode leveling device of this application from another angle on the upper side; Figure 4 This is a cross-sectional view of the air-cooled mounting box in the battery electrode leveling device of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Lateral guide bracket; 3. Placement seat; 4. Support block; 5. First drive motor; 6. Adjusting screw; 7. Screw; 8. Lateral guide groove; 9. Sliding connecting strip; 10. Leveling adjustment mechanism; 11. Air-cooled curing mechanism; 12. Controller; 101. Leveling mounting frame; 102. Lifting adjustment block; 103. Electric lifting rod; 104. First connecting rod; 105. Second connecting rod; 106. Leveling pressure plate; 107. Lifting guide groove; 108. Guide slider; 111. Air-cooled mounting box; 112. Second drive motor; 113. Air-cooled impeller shaft; 114. Air-cooled impeller; 115. Air distribution nozzle; 116. Air inlet. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0022] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0023] 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.

[0024] As described in the background section, existing lithium electrode coating and leveling equipment generally suffers from inconvenient adjustment and low accuracy in adjusting the leveling gap. Most equipment uses a fixed roller gap structure, which can only be adjusted intermittently using simple methods such as shims or manual bolts, making it difficult to flexibly adapt to the production of positive and negative electrode sheets of different thicknesses and widths. Furthermore, most existing leveling devices lack an integrated rapid curing mechanism, leaving the electrode sheets in a wet or semi-dry film state after leveling. This makes them prone to springback or deformation during transport, leading to leveling failure. Adding an independent curing device increases production line length and equipment costs, and also disrupts process connections. To address these technical problems, this application provides a lithium electrode coating and leveling device. The following detailed description of the device's structure, connections, and operation is provided in conjunction with specific embodiments. Please refer to... Figures 1 to 4 As shown, the battery electrode leveling device of this application includes a frame 2, a leveling and adjusting mechanism 10, a cooling and curing mechanism, and a controller 12; The frame 2 is provided with a transverse guide groove 8, and a sliding connecting strip 9 is slidably installed in the transverse guide groove 8. The sliding connecting strip 9 is slidably installed on the transverse guide bracket 2. The screw 7 is fixedly installed on the sliding connecting strip 9. A leveling and adjusting mechanism 10 is fixedly installed on the sliding connecting strip 9. A cooling and curing mechanism is fixedly installed on the leveling and adjusting mechanism 10. A transverse guide bracket 2 is fixedly installed on the frame 2, a placement seat 3 is fixedly installed on the transverse guide bracket 2, a support block 4 is fixedly installed at the bottom of the placement seat 3, an adjusting screw 6 is rotatably installed inside the support block 4, and a screw rod 7 is threaded onto the adjusting screw 6. The controller 12 is fixedly installed on the cooling and curing mechanism or the leveling and adjusting mechanism 10.

[0025] The lithium electrode sheet coating and leveling device provided in this application includes a frame 2. The frame 2 serves as the supporting foundation for the entire device, and a transverse guide bracket 2 is fixedly mounted on it. A placement seat 3 is fixedly mounted on the transverse guide bracket 2, which is used to support the lithium electrode sheet to be leveled. A transverse guide groove 8 is formed on the frame 2, and a sliding connecting strip 9 is slidably installed within the transverse guide groove 8. This sliding connecting strip 9 is also slidably mounted on the transverse guide bracket 2. The above structure constitutes a dual-guide mechanism, meaning that the sliding connecting strip 9 is subject to two guiding constraints: the transverse guide groove 8 and the transverse guide bracket 2. In mechanical guide design, the use of a dual-guide structure can effectively limit the degrees of freedom of moving parts in non-moving directions, reducing swaying and wobble during lateral movement. Existing research has shown that using a dual-guide structure with guide rails and grooves in coating equipment can improve the smoothness of movement of moving parts. Specifically, in this application, when the sliding connecting bar 9 moves laterally, its bottom is constrained by the lateral guide groove 8 and its side is constrained by the lateral guide bracket 2. The two constraint directions are perpendicular to each other, thereby limiting the position of the sliding connecting bar 9 in two orthogonal directions in the horizontal plane, so that it can only move along the preset lateral trajectory.

[0026] A support block 4 is fixedly installed at the bottom of the placement base 3, and an adjusting screw 6 is rotatably installed inside the support block 4. A threaded rod 7 is threaded onto the adjusting screw 6, and the threaded rod 7 is fixedly installed on the sliding connecting strip 9. A first drive motor 5 is also fixedly installed at the bottom of the placement base 3, and the adjusting screw 6 is coaxially fixedly installed at the output end of the first drive motor 5. The above structure constitutes a screw-nut transmission mechanism. Screw transmission is a commonly used linear motion method in the field of industrial automation. Its working principle is to convert the rotational motion of the motor into the linear motion of the nut. In the field of coating equipment, existing technologies use servo motors to drive screw transmission, converting the rotational motion of the screw into linear motion to drive related components to achieve position adjustment. Screw transmission has higher positioning accuracy than methods such as cylinder drive. For example, in coating die head adjustment technology, using a servo motor in conjunction with a screw assembly can achieve precise control of the coating gap. When the first drive motor 5 is started and drives the adjusting screw 6 to rotate, the threaded rod 7, which is threaded onto the adjusting screw 6, moves linearly along the axis of the adjusting screw 6. Since the threaded rod 7 is fixedly connected to the sliding connecting strip 9, it pushes the sliding connecting strip 9 to move synchronously. During the displacement process, the sliding connecting strip 9 is simultaneously constrained by the transverse guide groove 8 and the transverse guide bracket 2, realizing double guide limit and ensuring the accuracy of the motion trajectory of the sliding connecting strip 9 during the movement.

[0027] It should be noted that the thread fit parameters of the adjusting screw 6 and the screw bar 7 in this application can be selected according to the actual load and accuracy requirements. For example, trapezoidal threads or ball screw threads can be used, among which ball screws have the characteristics of high transmission efficiency and low friction, and are suitable for occasions requiring frequent reciprocating motion. In terms of the driving method, in addition to servo motors, stepper motors or other transmission methods such as synchronous belts, gear racks, etc. can also be used to achieve lateral movement, and this application does not impose any restrictions on this.

[0028] A leveling adjustment mechanism 10 is fixedly installed on the sliding connecting bar 9. The leveling adjustment mechanism 10 includes a leveling mounting frame 101 fixedly installed on the sliding connecting bar 9, and a lifting adjustment block 102 slidably installed within the leveling mounting frame 101. A cooling and curing mechanism is fixedly installed on the leveling adjustment mechanism 10, and an electric lifting rod 103 is fixedly installed on the cooling and curing mechanism. A first connecting rod 104 is fixedly installed at the output end of the electric lifting rod 103, a second connecting rod 105 is fixedly installed at the bottom of the first connecting rod 104, and a leveling pressure plate 106 is fixedly installed at the bottom of the lifting adjustment block 102. A lifting guide groove 107 is provided inside the leveling mounting frame 101, and a guide slider 108 is fixedly installed on the side of the lifting adjustment block 102 near the lifting guide groove 107, and the guide slider 108 slidably installs within the lifting guide groove 107.

[0029] The aforementioned leveling adjustment mechanism 10 achieves electrically adjustable leveling spacing. Activating the electric lifting rod 103 outputs power to drive the first connecting rod 104, which in turn moves the second connecting rod 105, thereby pushing the lifting adjustment block 102 to slide up and down inside the leveling mounting frame 101. The guide slider 108 on one side of the lifting adjustment block 102 slides along the lifting guide groove 107 inside the leveling mounting frame 101, providing guidance and preventing deviation, ensuring smooth lifting and lowering of the lifting adjustment block 102. By adjusting the height of the lifting adjustment block 102, the spacing between the leveling pressure plate 106 and the electrode sheet on the placement seat 3 can be changed, thus adapting to electrode sheets of different thicknesses. In coating leveling equipment, replacing manual adjustment with electric lifting is an important direction for improving the automation level of the equipment. Existing technology shows that controlling the lifting or movement of the coating die head through an electric actuator can achieve rapid response and precise positioning. For example, in the slitting machine cutting leveling device, adjusting the screw controls the raising and lowering of the leveling cutter, facilitating the switching of leveling states. This application adopts an electric lifting rod 103 combined with a guide groove-slider structure, which has the advantages of fast adjustment speed, continuous adjustment and repeatable adjustment position compared with the manual bolt adjustment method.

[0030] The electric lifting rod 103 can be any one of a pneumatic cylinder, an electric push rod, or a hydraulic cylinder. Among these, the electric push rod is characterized by convenient control and high positioning accuracy, making it suitable for use with the controller 12 to achieve automated control. The pneumatic cylinder, on the other hand, has the advantages of fast response and simple structure, making it suitable for applications requiring high adjustment speeds. In practical applications, the appropriate drive method can be selected according to specific process requirements.

[0031] The cooling and curing mechanism is fixedly mounted on the leveling and adjusting mechanism 10. Specifically, the cooling and curing mechanism includes an air-cooled mounting box 111 fixedly mounted on the lifting adjusting block 102. The aforementioned electric lifting rod 103 is fixedly mounted on the upper surface of the air-cooled mounting box 111. A second drive motor 112 is also fixedly mounted on the upper surface of the air-cooled mounting box 111. An air-cooled impeller shaft 113 is coaxially fixedly mounted on the output end of the second drive motor 112, and an air-cooled impeller 114 is fixedly mounted on the air-cooled impeller shaft 113. An air distribution nozzle 115 is fixedly mounted on the bottom of the air-cooled mounting box 111, and an air inlet 116 is provided on the air-cooled mounting box 111.

[0032] The aforementioned cooling and curing mechanism enables rapid air-cooling curing of the leveled electrode sheets. The second drive motor 112 is activated, causing the air-cooled impeller shaft 113 to rotate, which in turn causes the air-cooled impeller 114 to rotate at high speed, generating a stable airflow. The airflow is guided through the internal air duct of the air-cooled mounting box 111 and blown out from the bottom air distribution nozzle 115, evenly covering the electrode surface. The function of the air distribution nozzle 115 is to disperse the concentrated airflow into a uniformly distributed airflow, avoiding uneven cooling caused by excessively high or low local wind speeds. The air inlet 116 is used to ensure the air pressure balance inside and outside the air-cooled mounting box 111, ensuring smooth airflow circulation.

[0033] In the electrode coating process, the coating is still in a wet or semi-dry film state after leveling. At this time, the solvent or dispersant in the coating has not completely evaporated, and the coating has strong fluidity. If the coating is not rapidly cured at this stage, it is prone to flow during subsequent electrode transport due to gravity, tension, or contact with the transfer rollers, resulting in damage to the leveled flatness and causing springback or deformation. Rapid cooling of the coating using air cooling can lower its temperature, thereby increasing its viscosity, reducing its fluidity, and achieving rapid setting. Existing research shows that integrating a rapid curing mechanism into the coating leveling process helps reduce the connection time between processes and improves production continuity. It should be noted that in addition to air cooling, the cooling and curing mechanism can also be implemented using vortex fans or thermoelectric coolers. Vortex fans can generate a large air volume, while thermoelectric coolers can achieve active cooling, suitable for applications with more precise cooling temperature requirements.

[0034] A controller 12 is fixedly installed on the cooling and curing mechanism or leveling and adjusting mechanism 10. The controller 12 is electrically connected to the first drive motor 5, the second drive motor 112, and the electric lifting rod 103, and is used to monitor and adjust various operating parameters in real time, including the lifting height of the leveling plate 106 (i.e., the leveling gap), the lateral movement speed, and the air cooling intensity (i.e., the rotation speed of the second drive motor 112). The controller 12 can be a programmable logic controller 12 or a single-chip microcomputer control system. Introducing an automatic control system into coating equipment is a technological trend to improve the intelligence level of the equipment. Existing technology shows that by using a closed-loop control system to collect data such as areal density in real time and compare it with preset target values, precise adjustment amounts can be generated and sent to the actuators to achieve fully automatic closed-loop control. The controller 12 in this application can automatically control the electric lifting rod 103 to adjust the leveling gap to the target value according to the preset electrode thickness parameters; at the same time, it can adjust the rotation speed of the second drive motor 112 according to process requirements to change the air cooling intensity. The controller 12 can also integrate sensor feedback functions. For example, a displacement sensor can be set on the leveling plate 106 or the lifting adjustment block 102 to detect the lifting position in real time and feed it back to the controller 12 to achieve closed-loop control and further improve the adjustment accuracy.

[0035] In use, the coated electrode is placed on the placement seat 3. First, according to the electrode thickness specifications, the electric lifting rod 103 is controlled by the controller 12 to adjust the distance between the leveling plate 106 and the electrode. The electric lifting rod 103 drives the first connecting rod 104 and the second connecting rod 105 to move, pushing the lifting adjustment block 102 to slide up and down inside the leveling mounting frame 101. The guide slider 108 slides along the lifting guide groove 107 to ensure the smoothness and positional accuracy of the lifting process. After the leveling distance is adjusted, the first drive motor 5 is started to drive the adjusting screw 6 to rotate, which drives the screw 7 and the sliding connecting strip 9 to move along the transverse guide groove 8 and the transverse guide bracket 2, so that the leveling plate 106 moves laterally on the electrode surface to complete the leveling operation. During or after leveling, the second drive motor 112 is started to drive the air-cooled impeller 114 to rotate at high speed. The generated airflow is blown evenly onto the electrode surface through the air distribution nozzle 115 to quickly cool and solidify the electrode coating. All of the above actions can be centrally controlled and their parameters adjusted through controller 12.

[0036] The lithium electrode coating and leveling device provided in this application utilizes a dual-guide structure formed by the transverse guide groove 8 and the transverse guide support 2 on the frame 2, which, in conjunction with a screw drive mechanism, achieves smooth transverse movement and precise positioning. The electric lifting rod 103 in the leveling adjustment mechanism 10, in cooperation with the lifting guide groove 107 and the guide slider 108, enables electrically and continuously adjustable leveling spacing. An integrated air-cooled curing mechanism 11 on the side of the leveling pressure plate 106 facilitates rapid cooling and curing of the electrode sheet after leveling, reducing the risk of coating springback and deformation. A controller 12 enables centralized control and parameter adjustment of all moving parts. These technical solutions work together synergistically to effectively overcome the shortcomings of existing equipment in terms of ease of spacing adjustment, curing integration, and operational stability.

[0037] In one embodiment, a first drive motor 5 is fixedly installed at the bottom of the placement base 3, and an adjusting screw 6 is coaxially fixedly installed at the output end of the first drive motor 5. With this configuration, the first drive motor 5 serves as a power source, and its output shaft is coaxially connected to the adjusting screw 6. This reduces energy loss in the transmission process, improves power transmission efficiency, and enables the conversion of the screw's rotational motion into linear motion, driving the inclined block to adjust the mold head position. In this application, the first drive motor 5 can be a servo motor or a stepper motor. Servo motors have the characteristic of high position control accuracy and are suitable for leveling operations requiring accurate lateral positioning. A coupling can also be provided between the first drive motor 5 and the adjusting screw 6 to compensate for installation errors and ensure smooth transmission. In batch leveling devices, there are precedents of using a screw drive motor to rotate the screw, which in turn drives the upper pressure plate to move downwards via the screw nut to level the lithium battery. The leveling height and leveling force can be precisely controlled.

[0038] In one embodiment, the leveling adjustment mechanism 10 includes a leveling mounting frame 101 fixedly mounted on the sliding connecting bar 9, and a lifting adjustment block 102 slidably mounted within the leveling mounting frame 101. The leveling mounting frame 101, serving as the support for the lifting adjustment block 102, can be made of metal profiles or welded structural components to ensure sufficient structural rigidity. The lifting adjustment block 102 is made of wear-resistant metal material, and the clearance between it and the inner wall of the leveling mounting frame 101 should be controlled within the range of 0.02mm to 0.05mm to ensure smooth lifting movement without excessive swaying. Through this arrangement, the leveling mounting frame 101 provides a vertical movement track for the lifting adjustment block 102, while the lifting adjustment block 102 serves as an indirect mounting base for the leveling pressure plate 106, allowing the leveling distance to be adjusted by changing the position of the lifting adjustment block 102.

[0039] In one embodiment, a lifting rod is fixedly installed on the cooling and curing mechanism. A first connecting rod 104 is fixedly installed at the output end of the lifting rod, and a second connecting rod 105 is fixedly installed at the bottom of the first connecting rod 104. A leveling plate 106 is fixedly installed at the bottom of the lifting adjustment block 102. The lifting rod, as a power actuator, transmits driving force to the lifting adjustment block 102 through the first connecting rod 104 and the second connecting rod 105 at its output end. The multi-link connection method (combination of the first connecting rod 104 and the second connecting rod 105) can adapt to installation space constraints and avoid the lifting rod directly bearing radial load, thus extending its service life. The leveling plate 106, as a working component that directly contacts the electrode sheet, has a direct impact on the leveling effect due to its surface flatness and surface roughness.

[0040] In one embodiment, a lifting guide groove 107 is provided in the leveling mounting bracket 101. A guide slider 108 is fixedly installed on the side of the lifting adjusting block 102 near the lifting guide groove 107, and the guide slider 108 is slidably installed in the lifting guide groove 107. The lifting guide groove 107 and the guide slider 108 form a sliding guide pair, and its cross-sectional shape can be a rectangular groove, a dovetail groove, or a T-shaped groove. Among them, the dovetail groove has high guiding accuracy and self-locking characteristics, and is suitable for vertical guiding applications. In this application, when the guide slider 108 slides along the lifting guide groove 107, it can restrict the displacement freedom of the lifting adjusting block 102 in the horizontal direction, so that it can only move in the vertical direction, thereby improving the motion trajectory accuracy of the lifting adjusting block 102 and ensuring the parallelism between the lower surface of the leveling pressure plate 106 and the upper surface of the placement seat 3.

[0041] In one embodiment, the cooling and curing mechanism includes an air-cooled mounting box 111 fixedly mounted on a lifting adjustment block 102. A lifting rod is fixedly mounted on the upper surface of the air-cooled mounting box 111. A second drive motor 112 is fixedly mounted on the upper surface of the air-cooled mounting box 111. An air-cooled impeller shaft 113 is coaxially fixedly mounted on the output end of the second drive motor 112. An air-cooled impeller 114 is fixedly mounted on the air-cooled impeller shaft 113. The air-cooled mounting box 111, as the structural carrier of the entire air-cooling system, can be formed by bending and welding thin aluminum alloy plates. Aluminum alloy has good thermal conductivity, which helps dissipate the heat generated during motor operation. The second drive motor 112 is coaxially connected to the air-cooled impeller shaft 113, resulting in direct power transmission and a compact structure. The air-cooled impeller 114 can be a centrifugal impeller or an axial flow impeller. The centrifugal impeller generates higher air pressure, which helps the airflow maintain a certain velocity after being transported through the air duct.

[0042] In one embodiment, an air distribution nozzle 115 is fixedly installed at the bottom of the air-cooled mounting box 111, and an air inlet 116 is provided on the air-cooled mounting box 111. The air inlet 116 serves as the airflow inlet, and its location and diameter affect the airflow resistance. In the field of electrode cooling devices, there is a described technical solution including a mounting body, an air distribution box, an air-cooling assembly, and multiple air outlet nozzles, wherein the multiple air outlet nozzles are respectively located at the bottom of the air distribution box and communicate with the air distribution box, and each of the multiple air outlet nozzles is provided with an air outlet slit for spraying airflow. In this application, the air distribution nozzle 115 can adopt a strip-shaped slit structure or a multiple circular hole array structure, the function of which is to disperse the concentrated airflow into a uniformly distributed airflow, avoiding uneven cooling of the electrode coating due to excessively high or low local wind speeds. The air distribution nozzle 115 should be positioned so that its air outlet plane maintains an appropriate distance from the lower surface of the leveling plate 106 to ensure that the airflow can cover the leveled electrode area.

[0043] In one embodiment, the lifting rod is driven by a pneumatic cylinder, an electric actuator, or a hydraulic cylinder. Each of these three driving methods has its own characteristics: a pneumatic cylinder uses compressed air as a power source, offering advantages such as fast response, high operating frequency, and simple structure, making it suitable for applications requiring high adjustment speeds, but it requires an air source processing component; an electric actuator (also known as an electric cylinder) uses a motor to drive a lead screw and nut mechanism to achieve linear motion, offering convenient control, high positioning accuracy, and self-locking capabilities, making it suitable for use with the controller 12 to achieve closed-loop position control; a hydraulic cylinder provides high output thrust and smooth operation, but its hydraulic system is relatively complex, making it suitable for applications with large loads. Alternatively, any of the above driving methods can be flexibly selected based on the actual leveling load, adjustment accuracy requirements, and cost budget.

[0044] In one embodiment, lateral movement is achieved by using a synchronous belt, rack and pinion, or cylinder drive. Synchronous belt drive, where a motor drives the synchronous belt pulley, features accurate transmission ratio, low noise, and high maintainability. The online sampling system in the electrode coating production line describes a technical solution using synchronous belts with low noise and high maintainability, indicating the mature application of synchronous belts in electrode processing equipment. Rack and pinion drive transmits power through the meshing of gears and racks, offering strong load-bearing capacity, a constant transmission ratio, and a long applicable stroke, making it suitable for applications requiring significant lateral movement. Cylinder drive is simple in structure and quick in action, suitable for lateral movement scenarios where positioning accuracy is not critical. In comparison, this application preferably uses a transmission method with a first drive motor 5 and an adjusting screw 6, which offers higher positioning accuracy and better self-locking performance compared to synchronous belt, rack and pinion, and cylinder drives, making it particularly suitable for applications requiring high leveling position accuracy.

[0045] In one embodiment, the cooling and curing mechanism is a vortex fan or a thermoelectric cooler. A vortex fan utilizes centrifugal force to generate high-pressure airflow, characterized by high air pressure and stable air volume, capable of producing airflow with a certain velocity for electrode cooling. Compared to the aforementioned centrifugal air-cooled impeller 114, the vortex fan integrates a drive motor and a fan unit, resulting in a more compact structure. A thermoelectric cooler, based on the Peltier effect, cools one side and heats the other when a direct current is applied, achieving active cooling. It features no moving parts, no noise, high temperature control accuracy, and fast response. In processes requiring lower-temperature cooling of the electrode coating, a thermoelectric cooler can generate cold air below ambient temperature, thus achieving better cooling and curing effects. The thermoelectric cooler can be installed inside the air-cooled mounting box 111 or at the air inlet 116, so that the airflow entering the air-cooled mounting box 111 is first cooled by the cold end of the thermoelectric cooler before being blown onto the electrode surface by the air-cooled impeller 114. The rapid curing function of the cooling and curing mechanism in this application can be achieved by selecting according to specific process requirements (such as cooling temperature, air volume, equipment cost, etc.).

[0046] As described above, the lithium electrode coating and leveling device provided in this application is designed to overcome the shortcomings of existing equipment, such as inconvenient leveling spacing adjustment, low adjustment accuracy, poor adaptability to electrode sheets of different specifications, and lack of an integrated rapid curing mechanism. To achieve the above objectives, this application constructs a technical solution including a frame, a leveling adjustment mechanism, a cooling and curing mechanism, and a controller. This application utilizes a double-guide structure formed by the transverse guide groove and transverse guide support on the frame, combined with a screw drive mechanism to achieve smooth transverse movement and positioning accuracy; the electric lifting rod in the leveling adjustment mechanism, in conjunction with the lifting guide groove and guide slider, enables electric and continuous adjustment of the leveling spacing; the integrated air-cooled curing mechanism beside the leveling pressure plate enables rapid cooling and curing of the electrode sheet after leveling; and the controller enables centralized control and parameter adjustment of all moving parts. The above technical solutions work together synergistically to effectively overcome the shortcomings of existing equipment in terms of convenient spacing adjustment, curing integration, and operational stability.

[0047] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.

Claims

1. A battery pole piece flattening device, characterized by, Includes a frame, leveling and adjusting mechanism, cooling and curing mechanism, and controller; The frame is provided with a transverse guide groove, and a sliding connecting strip is slidably installed in the transverse guide groove. The sliding connecting strip is slidably installed on the transverse guide bracket. The screw is fixedly installed on the sliding connecting strip. A leveling and adjusting mechanism is fixedly installed on the sliding connecting strip. A cooling and curing mechanism is fixedly installed on the leveling and adjusting mechanism. A transverse guide bracket is fixedly installed on the frame, a placement seat is fixedly installed on the transverse guide bracket, a support block is fixedly installed at the bottom of the placement seat, an adjusting screw is rotatably installed inside the support block, and a threaded rod is threaded onto the adjusting screw. The controller is fixedly installed on the cooling and curing mechanism or the leveling and adjusting mechanism.

2. The battery pole piece flattening device of claim 1, wherein, The bottom of the placement base is fixedly installed with a first drive motor, and the adjusting screw is coaxially fixedly installed at the output end of the first drive motor.

3. The battery pole piece flattening device of claim 2, wherein, The leveling and adjusting mechanism includes a leveling mounting frame fixedly installed on a sliding connecting bar, and a lifting and adjusting block is slidably installed inside the leveling mounting frame.

4. The battery pole piece flattening device of claim 1, wherein, A lifting rod is fixedly installed on the cooling and curing mechanism. A first connecting rod is fixedly installed at the output end of the lifting rod. A second connecting rod is fixedly installed at the bottom of the first connecting rod. A leveling pressure plate is fixedly installed at the bottom of the lifting adjustment block.

5. The battery electrode leveling device according to claim 1, characterized in that, The leveling mounting frame has a lifting guide groove, and a guide slider is fixedly installed on the side of the lifting adjustment block near the lifting guide groove. The guide slider is slidably installed in the lifting guide groove.

6. The battery electrode leveling device according to claim 1, characterized in that, The cooling and curing mechanism includes an air-cooled mounting box fixedly installed on the lifting adjustment block. The lifting rod is fixedly installed on the upper surface of the air-cooled mounting box. A second drive motor is fixedly installed on the upper surface of the air-cooled mounting box. An air-cooled impeller shaft is coaxially fixedly installed on the output end of the second drive motor. An air-cooled impeller is fixedly installed on the air-cooled impeller shaft.

7. The battery electrode leveling device according to claim 6, characterized in that, The bottom of the air-cooled mounting box is fixedly equipped with an air distribution nozzle, and the air-cooled mounting box is provided with an air inlet.

8. The battery electrode leveling device according to claim 1, characterized in that, The lifting rod is operated by a pneumatic cylinder, an electric push rod, or a hydraulic cylinder.

9. The battery electrode leveling device according to claim 8, characterized in that, Lateral movement is achieved by using synchronous belts, rack and pinion gears, or cylinders for transmission.

10. The battery electrode leveling device according to claim 1, characterized in that, The cooling and curing mechanism is a vortex fan or a semiconductor refrigeration chip.

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