A winding machine pole piece compounding mechanism

Abstract

The application relates to a winding machine pole piece composite mechanism which comprises a frame, first sliding rails arranged on the inner side walls of the frame, a fixed first bearing seat and a slidable second bearing seat arranged between the first sliding rails on the two sides, an active heating steel roller assembly arranged on the first bearing seat, an active heating rubber roller assembly arranged on the second bearing seat, and a servo pressing assembly arranged at one end of the frame and used for driving the second bearing seat to slide. The servo pressing assembly comprises a second sliding rail, a push-pull sliding seat arranged on the second sliding rail, a screw rod and a servo motor. One end of the push-pull sliding seat is connected with the second bearing seat, the other end is threadedly connected with the screw rod, the servo motor is fixedly connected with the end face of the frame and the output end of the servo motor is drivingly connected with the screw rod. The utility model belongs to the technical field of battery production and has extremely high pressing precision and stability, excellent hot-pressing composite quality, reliable operation and long service life.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a winding machine electrode composite mechanism. Background Technology

[0002] In the production process of lithium-ion batteries, cell fabrication is the core step. Winded cells require the precise stacking and hot-pressing of the anode, separator, and cathode sheets to form a three-layer structure of "anode-separator-cathode," which is then wound. Traditional composite mechanisms typically employ passive rolling or simple pneumatic / hydraulic pressing methods, which have the following drawbacks: (1) Inaccurate control of pressing force: The pneumatic or hydraulic system has response delay and pressure fluctuation, which leads to unstable pressing force between rollers, resulting in poor uniformity of bonding between the electrode and the separator. Sometimes the pressure is too high, causing the separator to perforate, and sometimes the pressure is insufficient, causing the bonding to be weak, affecting the consistency and safety of the battery. (2) Poor hot pressing effect: Traditional heating methods are mostly external heating, which has low heat transfer efficiency and uneven temperature on the roller surface, resulting in an unsatisfactory hot pressing composite effect and insufficient adhesion between the electrode sheet and the diaphragm.

[0003] Therefore, there is an urgent need for an electrode composite mechanism with precise pressure control, good hot pressing effect, and high degree of automation to improve the production quality and efficiency of lithium-ion batteries. Utility Model Content

[0004] Based on this, it is necessary to provide a composite electrode mechanism for a winding machine, the specific technical solution of which is as follows.

[0005] A winding machine electrode composite mechanism includes a frame. First slide rails are provided on both side walls inside the frame. A first bearing seat and a slidable second bearing seat are fixedly disposed between the first slide rails on both sides. An active heating steel roller assembly is disposed on the first bearing seat, and an active heating rubber roller assembly is disposed on the second bearing seat. A servo pressing assembly for driving the second bearing seat to slide is provided at one end of the frame. The servo pressing assembly includes a second slide rail, a push-pull slide seat disposed on the second slide rail, a lead screw, and a servo motor. One end of the push-pull slide seat is connected to the second bearing seat, and the other end is threadedly connected to the lead screw. The servo motor is fixedly connected to the end face of the frame, and its output end is drivenly connected to the lead screw.

[0006] Furthermore, the active heating steel roller assembly includes a steel roller rotatably mounted on a first bearing seat via a bearing, a first heating rod disposed inside the steel roller, and a first drive motor for driving the steel roller.

[0007] Furthermore, the outer end of the first bearing housing is provided with a first fixed frame, the first fixed frame is provided with a first coupling connected to the central shaft of the steel roller, the outer end of the first fixed frame is provided with a first reducer, the output shaft of the first drive motor is connected to the input shaft of the first reducer, and the front end of the output shaft of the first reducer is connected to the rotating shaft of the first coupling.

[0008] Furthermore, a first electric slip ring is connected to the rear end of the output shaft of the first reducer, and the heating wire harness of the first heating rod passes through the central shaft of the steel roller, the rotating shaft of the first coupling, and the output shaft of the first reducer and is electrically connected to the first electric slip ring.

[0009] Furthermore, the active heating roller assembly includes a roller rotatably mounted on a second bearing seat via a bearing, a second heating rod disposed inside the roller, and a second drive motor for driving the roller.

[0010] Furthermore, the outer end of the second bearing housing is provided with a second fixed frame, the second fixed frame is provided with a second coupling connected to the central shaft of the rubber roller, the outer end of the second fixed frame is provided with a second reducer, the output shaft of the second drive motor is connected to the input shaft of the second reducer, and the front end of the output shaft of the second reducer is connected to the rotating shaft of the second coupling.

[0011] Furthermore, a second electric slip ring is connected to the rear end of the output shaft of the second reducer, and the heating wire harness of the second heating rod passes through the central shaft of the rubber roller, the rotating shaft of the second coupling, and the output shaft of the second reducer and is electrically connected to the second electric slip ring.

[0012] Furthermore, push-pull rods are provided on both sides of the end face of the push-pull slide, and the front ends of the two push-pull rods are provided with push-pull plates that are connected to the second bearing seat.

[0013] Furthermore, the front ends of the two push-pull rods are fixedly connected to the push-pull plate, the rear ends of the two push-pull rods are slidably connected to the push-pull slide, the rear ends of the two push-pull rods are provided with limiting nuts that are adapted to the rear end face of the push-pull slide, the middle of the two push-pull rods is provided with a limiting plate, and a buffer spring is provided on the two push-pull rods between the limiting plate and the front end face of the push-pull slide.

[0014] Compared with existing technologies, this utility model has the following beneficial effects: (1) The winding machine electrode composite mechanism of this utility model adopts the driving method of servo motor and lead screw pair, realizes digital and high-precision closed-loop control of the pressing force, completely eliminates the instability of the traditional fluid pressure system, and greatly improves the consistency of battery electrode composite quality. (2) The winding machine electrode composite mechanism of this utility model adopts an active heating and driving design with built-in heating rods for both rollers. The heating is uniform and efficient, and the traction is stable and without slippage, so that the electrode, diaphragm and cathode sheet can be firmly and uniformly attached together, which effectively improves the performance and safety of the battery cell. (3) The composite mechanism of the winding machine electrode of this utility model solves the problem of rotation power supply through the electric slip ring, ensures smooth transmission through the reducer and coupling, and protects the equipment from impact through the buffer spring. The overall structure is reasonably designed, highly reliable, easy to maintain and has a long service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural view of the electrode composite mechanism of the winding machine of this utility model; Figure 2 This is an enlarged perspective view of the servo pressing component in this utility model; Figure 3 This is an enlarged top view of the servo pressing assembly in this utility model; Figure 4 This is an enlarged perspective view of the active heating steel roller assembly in this utility model; Figure 5 This is an enlarged perspective view of the active heating roller assembly in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Frame; 2. First slide rail; 3. First bearing seat; 4. Second bearing seat; 5. Active heating steel roller assembly; 6. Active heating rubber roller assembly; 7. Servo pressing assembly; 8. Second slide rail; 9. Push-pull slide; 10. Lead screw; 11. Servo motor; 12. Steel roller; 13. First heating rod; 14. First drive motor; 15. First fixing frame; 16. First coupling; 17. First reducer; 18. First electric slip ring; 19. Rubber roller; 20. Second heating rod; 21. Second drive motor; 22. Second fixing frame; 23. Second coupling; 24. Second reducer; 25. Second electric slip ring; 26. Push-pull rod; 27. Push-pull plate; 28. Limit nut; 29. ​​Limit plate; 30. Buffer spring; 31. Third coupling. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] The embodiments of this utility model will be described below based on its overall structure.

[0020] Reference Figures 1-5 As shown, this embodiment provides a winding machine electrode composite mechanism, including a frame 1. First slide rails 2 are provided on both side walls inside the frame 1. A first bearing seat 3 and a slidable second bearing seat 4 are fixedly disposed between the first slide rails 2 on both sides. An active heating steel roller assembly 5 is provided on the first bearing seat 3, and an active heating rubber roller assembly 6 is provided on the second bearing seat 4. A servo pressing assembly 7 for driving the second bearing seat 4 to slide is provided at one end of the frame 1. The servo pressing assembly 7 includes a second slide rail 8 located at one end inside the frame 1 and a slidable second bearing seat 4 located at... The second slide rail 8 has a push-pull slide 9, a lead screw 10, and a servo motor 11. One end of the push-pull slide 9 is connected to the second bearing seat 4, and the other end is threaded to the lead screw 10. The servo motor 11 is fixedly connected to the end face of the frame 1 through a third coupling 31, and its output end is drivenly connected to the lead screw 10 through the third coupling 31. After the anode sheet, diaphragm, and cathode sheet are stacked, they pass between the active heating steel roller assembly 5 and the active heating rubber roller assembly 6. The servo pressing assembly 7 drives the active heating rubber roller assembly 6 to slide and heat-press the stacked sheets together.

[0021] In the electrode composite mechanism of this utility model, a fixed first bearing seat 3 and a slidable second bearing seat 4 are provided, on which an active heating steel roller assembly 5 and an active heating rubber roller assembly 6 are respectively installed. The second bearing seat 4 is precisely driven to move by a servo pressing assembly 7 composed of a servo motor 11, a lead screw 10, etc., thereby controlling the pressing force between the two rollers. The stacked anode sheet, diaphragm, and cathode sheet pass between the two rollers. The servo motor 11 receives commands from the control system and drives the lead screw 10 to rotate, thereby pushing the push-pull slide 9 and the connected second bearing seat 4 to move towards the first bearing seat 3, causing the rubber roller 19 to press against the steel roller 12 with a set pressure. During this process, the two rollers not only provide pressing force but also actively pull the electrode sheet forward through their own rotation, while internal heating rods heat the roller body, achieving hot-pressing composite.

[0022] It achieves high-precision, programmable control of the pressing force, replacing the traditional unstable pneumatic / hydraulic pressing; the servo motor has extremely high control precision and response speed, which can achieve stepless, precise setting and stable maintenance of the pressing force, significantly improving the uniformity of bonding; it eliminates the influence of air pressure or hydraulic fluctuations, ensuring the consistency of the composite quality of each electrode segment; it is easy to integrate with the host computer, realizing the digital setting, storage and retrieval of pressure parameters, facilitating product changeover.

[0023] Specifically, refer to Figure 3 and Figure 4 The active heating steel roller assembly 5 includes a steel roller 12 rotatably mounted on a first bearing seat 3 via bearings, a first heating rod 13 disposed within the steel roller 12, and a first drive motor 14 driving the steel roller 12; the active heating rubber roller assembly 6 includes a rubber roller 19 rotatably mounted on a second bearing seat 4 via bearings, a second heating rod 20 disposed within the rubber roller 19, and a second drive motor 21 driving the rubber roller 19.

[0024] In this embodiment, the first drive motor 14 and the second drive motor 21 drive the steel roller 12 and the rubber roller 19 to rotate actively, thus pulling the material. Simultaneously, the first heating rod 13 and the second heating rod 20 directly heat the roller body from within, causing the roller surface temperature to rise rapidly and remain uniform. This integrates the three functions of pressing, pulling, and heating into one unit, improving heating efficiency and temperature uniformity. The built-in heating method offers high thermal efficiency, with heat transferred from the inside out, resulting in a uniform temperature field on the roller surface. This avoids localized overheating or insufficient temperature caused by external heating, leading to high-quality hot pressing.

[0025] Moreover, the active dual-roller drive avoids material slippage, stretching, or wrinkling that may be caused by the passive roller, resulting in smoother feeding and higher composite accuracy.

[0026] Specifically, the outer end of the first bearing housing 3 is provided with a first fixing frame 15, and the first fixing frame 15 is provided with a first coupling 16 connected to the central shaft of the steel roller 12. The outer end of the first fixing frame 15 is provided with a first reducer 17. The output shaft of the first drive motor 14 is connected to the input shaft of the first reducer 17, and the front end of the output shaft of the first reducer 17 is connected to the rotating shaft of the first coupling 16. The outer end of the second bearing housing 4 is provided with a second fixing frame 22, and the second fixing frame 22 is provided with a second coupling 23 connected to the central shaft of the rubber roller 19. The outer end of the second fixing frame 22 is provided with a second reducer 24. The output shaft of the second drive motor 21 is connected to the input shaft of the second reducer 24, and the front end of the output shaft of the second reducer 24 is connected to the rotating shaft of the second coupling 23.

[0027] In this embodiment, the output torque of the first drive motor 14 and the second drive motor 21 is amplified by the first reducer 17 and the second reducer 24, and then transmitted to the central shaft of the roller through the first coupling 16 and the second coupling 23, driving the roller body to rotate smoothly. This provides stable and reliable torque transmission and ensures the rigidity and accuracy of the roller body installation. The reducers provide suitable speed and torque, and the couplings compensate for minor alignment errors, ensuring smooth transmission and low noise.

[0028] Specifically, the output shaft of the first reducer 17 is connected to a first electric slip ring 18 at its rear end, and the heating wire harness of the first heating rod 13 passes through the central shaft of the steel roller 12, the rotating shaft of the first coupling 16, and the output shaft of the first reducer 17 and is electrically connected to the first electric slip ring 18; the output shaft of the second reducer 24 is connected to a second electric slip ring 25 at its rear end, and the heating wire harness of the second heating rod 20 passes through the central shaft of the rubber roller 19, the rotating shaft of the second coupling 23, and the output shaft of the second reducer 24 and is electrically connected to the second electric slip ring 25.

[0029] In this embodiment, the wiring harnesses of the first heating rod 13 and the second heating rod 20 pass through the axial hollow of each component inside the roller body and are finally connected to the rotor portion of the first slip ring 18 and the second slip ring 25. The stator portion of the first slip ring 18 and the second slip ring 25 is fixed, and an external power supply is connected to the stator. When the roller body and the output shaft rotate, the slip rings can continuously conduct electricity without disconnecting, achieving a reliable and continuous electrical connection between the rotating components and the fixed power supply. This solves the power supply problem of the heating elements inside the rotating roller body, enabling the mechanism to work continuously without interruption; it avoids the risk of wires being tangled or broken during rotation, improving the safety and service life of the equipment.

[0030] Specifically, push-pull rods 26 are provided on both sides of the end face of the push-pull slide 9, and push-pull plates 27 connected to the second bearing seat 4 are provided at the front ends of the two push-pull rods 26. In this embodiment, the push-pull slide is connected to the second bearing seat through the push-pull rods and push-pull plates on both sides; the concentrated force of the lead screw is converted into a balanced force acting on both sides of the second bearing seat through the push-pull plates; the balanced transmission of the pressing force is ensured, and the bearing seat is prevented from tilting; the parallelism of the rubber roller and the steel roller is ensured throughout the entire length, so that the electrode sheet is pressed evenly and the composite quality is extremely high.

[0031] Specifically, the front ends of the two push-pull rods 26 are fixedly connected to the push-pull plate 27, the rear ends of the two push-pull rods 26 are slidably connected to the push-pull slide 9, the rear ends of the two push-pull rods 26 are provided with limiting nuts 28 that are adapted to the rear end face of the push-pull slide 9, the middle part of the two push-pull rods 26 is provided with a limiting plate 29, and a buffer spring 30 is provided on the two push-pull rods 26 between the limiting plate 29 and the front end face of the push-pull slide 9. In this embodiment, the push-pull rod is slidably connected to the push-pull slide, with a limiting plate in the middle, a buffer spring on the rod, and a limiting nut at the rear end. During normal pressing, the push-pull slide transmits pressure through the compression spring to achieve elastic pressing. When the pressure is overloaded, the spring is compressed significantly, and the limiting nut triggers mechanical limiting to protect the equipment. This achieves flexible pressing contact and provides mechanical overload protection, avoiding damage to the roller surface and electrode sheet from rigid impacts. In abnormal situations such as foreign object jamming, it can effectively protect expensive components such as servo motors, lead screws, and rollers, ensuring equipment safety and service life. The spring gives the pressing force a certain "floating" characteristic, which can adapt to the slight thickness fluctuations of the electrode sheet stacking material, ensuring more uniform pressure distribution and avoiding damage to the material from hard impacts.

[0032] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composite electrode mechanism for a winding machine, characterized in that, The frame (1) includes a frame (1), on which two side walls are provided first slide rails (2), and between the first slide rails (2) on both sides are a fixed first bearing seat (3) and a slidable second bearing seat (4). The first bearing seat (3) is provided with an active heating steel roller assembly (5), and the second bearing seat (4) is provided with an active heating rubber roller assembly (6). One end of the frame (1) is provided with a servo pressing assembly (7) for driving the second bearing seat (4) to slide. The servo pressing assembly (7) includes a second slide rail (8), a push-pull slide seat (9) provided on the second slide rail (8), a lead screw (10) and a servo motor (11). One end of the push-pull slide seat (9) is connected to the second bearing seat (4) and the other end is threadedly connected to the lead screw (10). The servo motor (11) is fixedly connected to the end face of the frame (1) and its output end is connected to the lead screw (10) for transmission.

2. The winding machine electrode composite mechanism according to claim 1, characterized in that, The active heating steel roller assembly (5) includes a steel roller (12) rotatably mounted on a first bearing seat (3) via a bearing, a first heating rod (13) disposed inside the steel roller (12), and a first drive motor (14) that drives the steel roller (12).

3. The winding machine electrode composite mechanism according to claim 2, characterized in that, The first bearing housing (3) has a first fixed frame (15) at its outer end. The first fixed frame (15) has a first coupling (16) connected to the central shaft of the steel roller (12) inside. The first fixed frame (15) has a first reducer (17) at its outer end. The output shaft of the first drive motor (14) is connected to the input shaft of the first reducer (17). The front end of the output shaft of the first reducer (17) is connected to the rotating shaft of the first coupling (16).

4. The electrode composite mechanism for a winding machine according to claim 3, characterized in that, The first reducer (17) has a first electric slip ring (18) connected to the rear end of its output shaft. The heating wire harness of the first heating rod (13) passes through the central shaft of the steel roller (12), the rotating shaft of the first coupling (16), and the output shaft of the first reducer (17) and is electrically connected to the first electric slip ring (18).

5. A winding machine electrode composite mechanism according to claim 1, 2, 3, or 4, characterized in that, The active heating roller assembly (6) includes a roller (19) rotatably mounted on a second bearing seat (4) via a bearing, a second heating rod (20) disposed inside the roller (19), and a second drive motor (21) that drives the roller (19).

6. The electrode composite mechanism for a winding machine according to claim 5, characterized in that, The second bearing seat (4) is provided with a second fixed frame (22) at its outer end. The second fixed frame (22) is provided with a second coupling (23) connected to the central shaft of the rubber roller (19). The second fixed frame (22) is provided with a second reducer (24) at its outer end. The output shaft of the second drive motor (21) is connected to the input shaft of the second reducer (24). The front end of the output shaft of the second reducer (24) is connected to the rotating shaft of the second coupling (23).

7. A winding machine electrode composite mechanism according to claim 6, characterized in that, The output shaft of the second reducer (24) is connected to the rear end of the second electric slip ring (25). The heating wire harness of the second heating rod (20) passes through the central shaft of the rubber roller (19), the rotating shaft of the second coupling (23), and the output shaft of the second reducer (24) and is electrically connected to the second electric slip ring (25).

8. The electrode composite mechanism for a winding machine according to claim 1, characterized in that, Push-pull rods (26) are provided on both sides of the end face of the push-pull slide (9), and the front ends of the two push-pull rods (26) are provided with push-pull plates (27) connected to the second bearing seat (4).

9. A winding machine electrode composite mechanism according to claim 8, characterized in that, The front ends of the two push-pull rods (26) are fixedly connected to the push-pull plate (27), and the rear ends of the two push-pull rods (26) are slidably connected to the push-pull slide (9). The rear ends of the two push-pull rods (26) are provided with limiting nuts (28) that are adapted to the rear end face of the push-pull slide (9). The middle part of the two push-pull rods (26) is provided with a limiting plate (29), and a buffer spring (30) is provided on the two push-pull rods (26) between the limiting plate (29) and the front end face of the push-pull slide (9).

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