A slitting device for lithium battery separator production
Patent Information
- Application Number
- CN202522501529.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-25
AI Technical Summary
本实用新型的目的是为了解决现有部分设备结构简单，功能单一，分切机构的位置固定，无法灵活调整，难以满足不同规格隔膜的分切需求，导致设备适用性差，生产效率低下的问题，而提出的一种用于锂电池隔膜生产的分切设备
本实用新型通过设置纵向移动机构和横向移动机构，纵向移动机构和横向移动机构的组合，使得设备能够快速适应不同宽度和直径的隔膜母卷，更换生产规格时，无需更换大量机械部件，只需通过控制系统输入新参数，设备即可自动完成调整，大大缩短了准备时间，提高了生产效率，特别适合多品种、小批量的柔性生产需求。
Smart Images
Figure CN224917120U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of separator slitting technology, specifically a slitting device for lithium battery separator production. Background Technology
[0002] In the production process of lithium batteries, the separator is one of the key components. It plays a crucial role in separating the positive and negative electrodes of the battery, preventing short circuits, and allowing lithium ions to pass through to enable the battery's charging and discharging functions. The performance and quality of the separator directly affect key indicators of lithium batteries such as safety, capacity, and cycle life.
[0003] With the rapid development of the lithium battery industry, the market demand for lithium batteries is increasing, and the performance requirements for lithium batteries are also constantly improving. This has prompted the continuous expansion of the production scale of lithium battery separators, and has placed more stringent standards on the production efficiency and product quality of separators.
[0004] In the production process of lithium battery separators, the slitting process is a crucial step. Slitting is the process of cutting large rolls of separator into smaller rolls that meet the requirements of battery assembly according to specific specifications. The quality of slitting, such as the flatness of the cut edges and dimensional accuracy, directly affects the smooth progress of subsequent battery assembly and the overall performance of the battery.
[0005] However, some existing equipment has a simple structure and single function, and the position of the slitting mechanism is fixed and cannot be flexibly adjusted, making it difficult to meet the slitting requirements of different specifications of separators. This results in poor equipment applicability and low production efficiency. Therefore, a slitting equipment for lithium battery separator production is proposed to solve the above problems. Utility Model Content
[0006] (a) Technical problems to be solved The purpose of this invention is to solve the problems of existing equipment having simple structure, single function, fixed position of the slitting mechanism, inflexible adjustment, difficulty in meeting the slitting requirements of different specifications of separators, resulting in poor equipment applicability and low production efficiency. Therefore, this invention proposes a slitting equipment for lithium battery separator production.
[0007] (II) Technical Solution The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A slitting device for lithium battery separator production includes a frame, a guide mechanism at the top of the frame, a longitudinal moving mechanism located to the left of the guide mechanism at the top of the frame, a transverse moving mechanism on the longitudinal moving mechanism, a slitting mechanism at the top of the transverse moving mechanism, and a fixing mechanism at the top of the frame, located to the right of the guide mechanism, with a separator cylinder on the fixing mechanism.
[0008] Based on the above technical solution, the present invention can be further improved as follows.
[0009] Preferably, the guiding mechanism includes a guide shaft, which is rotatably connected to the top of the frame, and a guide roller is fixedly connected to the outside of the guide shaft.
[0010] Preferably, the longitudinal moving mechanism includes a mounting base, the top end of the frame is fixedly connected to the mounting base, the top end of the mounting base is fixedly connected to two slide rails, the top end of each of the two slide rails is slidably connected to two sliders, the top ends of the four sliders are fixedly connected to the longitudinal moving base, the bottom end of the longitudinal moving base is fixedly connected to a threaded sleeve, the rear end of the mounting base is fixedly connected to a drive motor, the output end of the drive motor is fixedly connected to a lead screw, the lead screw is threaded to the inner side of the threaded sleeve, and the lead screw is rotatably connected to the inner side of the mounting base.
[0011] Preferably, the lateral moving mechanism is a linear module, which is fixedly connected to the top of the longitudinal moving seat, and the cutting mechanism is fixedly connected to the moving end of the linear module.
[0012] Preferably, the fixing mechanism includes a rotating seat, a fixed seat is fixedly connected to the top of the frame, a cylinder is fixedly connected to the fixed seat, a top head is rotatably connected to the outer side of the output end of the cylinder, a rotating shaft is rotatably connected to the inner side of the rotating seat, the top head is connected to the inner side of the rotating shaft through a keyway, and the diaphragm cylinder is fixedly connected to the outer side of the rotating shaft.
[0013] (III) Beneficial Effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This invention, by setting up a longitudinal moving mechanism and a transverse moving mechanism, and the combination of the longitudinal moving mechanism and the transverse moving mechanism, enables the equipment to quickly adapt to diaphragm master rolls of different widths and diameters. When changing production specifications, there is no need to replace a large number of mechanical parts. The equipment can automatically complete the adjustment simply by inputting new parameters through the control system, which greatly shortens the preparation time and improves production efficiency. It is especially suitable for flexible production needs of multiple varieties and small batches. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the guiding mechanism structure of this utility model; Figure 3 This is a schematic diagram of the longitudinal moving mechanism of this utility model; Figure 4 This is a schematic diagram of the fixing mechanism of this utility model.
[0015] In the diagram: 1. Frame; 2. Guiding mechanism; 21. Guide shaft; 22. Guide roller; 3. Longitudinal moving mechanism; 31. Mounting seat; 32. Slide rail; 33. Slider; 34. Longitudinal moving seat; 35. Threaded sleeve; 36. Drive motor; 37. Lead screw; 4. Lateral moving mechanism; 5. Sliding mechanism; 6. Fixing mechanism; 61. Rotating seat; 62. Fixed seat; 63. Cylinder; 64. Top head; 65. Rotating shaft; 7. Diaphragm cylinder. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] In the embodiments, by Figure 1-4 A slitting device for lithium battery separator production is provided, comprising a frame 1, a guide mechanism 2 at the top of the frame 1, a longitudinal moving mechanism 3 located to the left of the guide mechanism 2 at the top of the frame 1, a transverse moving mechanism 4 on the longitudinal moving mechanism 3, a slitting mechanism 5 at the top of the transverse moving mechanism 4, a fixing mechanism 6 at the top of the frame 1, the fixing mechanism 6 being located to the right of the guide mechanism 2, and a separator cylinder 7 on the fixing mechanism 6.
[0018] With the above setup, the end (diaphragm) of the diaphragm tube 7 is pulled out and passes through the guide mechanism 2, whose core function is to correct and stabilize the running path of the diaphragm strip. The longitudinal moving mechanism 3 and the transverse moving mechanism 4 begin to work together. The longitudinal moving mechanism 3 is responsible for adjusting the position of the entire slitting head (i.e., the transverse moving mechanism 4 and the slitting mechanism 5) along the length of the frame 1 to accommodate diaphragm tubes 7 of different diameters. The transverse moving mechanism 4 is responsible for precisely adjusting the spacing between multiple slitting blades in the slitting mechanism 5, thereby determining the width of the final slitting diaphragm rolls. The equipment starts, and the fixing mechanism 6 unwinds at a uniform speed under damping control. The diaphragm strip passes smoothly under the slitting mechanism 5 under the pulling device (located on the left side of the slitting mechanism 5, not shown in the figure). The high-speed rotating circular blade of the slitting mechanism 5 is at a preset transverse position, thereby accurately slitting the wide diaphragm into multiple narrow diaphragms. The slit multiple narrow-width diaphragms are guided to multiple subsequent winding shafts (located on the left side of the equipment, not shown in the figure) for independent winding, ultimately forming multiple finished diaphragm rolls that meet the width requirements. The combination of the longitudinal moving mechanism 3 and the transverse moving mechanism 4 allows the equipment to quickly adapt to diaphragm master rolls of different widths and diameters. When changing production specifications, there is no need to replace a large number of mechanical parts; simply inputting new parameters through the control system allows the equipment to automatically complete the adjustment, greatly shortening preparation time and improving production efficiency. It is particularly suitable for flexible production needs of multiple varieties and small batches. It should be noted that the slitting mechanism 5 is existing technology known to those skilled in the art, and any device that can perform the slitting action can be used as the slitting mechanism 5, so it will not be described in detail.
[0019] Reference Figure 1-4 The guide mechanism 2 includes a guide shaft 21, the top of the frame 1 is rotatably connected to the guide shaft 21, and the outer side of the guide shaft 21 is fixedly connected to the guide roller 22. With the above structural arrangement, after the diaphragm is pulled out from the diaphragm cylinder 7, it first passes around one or more guide rollers 22. Each guide roller 22 forces the diaphragm to change its running direction and angle, thereby being precisely guided to a predetermined path and finally smoothly entering the slitting area. This is its most basic "guiding" function. Providing a wrap angle to maintain stable tension: The diaphragm wraps around the surface of the guide roller 22 at a certain angle (called the "wrap angle"). The friction generated by this contact helps to establish a uniform tension transition zone between unwinding (fixing mechanism 6) and rewinding (rewinding device on the left side of the slitting mechanism 5). It can absorb small tension fluctuations at the unwinding end, avoid the diaphragm from shaking or wrinkling due to sudden tension tightening or loosening, and ensure that the diaphragm entering the slitting mechanism 5 is always in a taut and flat state. Residual stress exists inside the lithium battery diaphragm substrate during manufacturing and rewinding, which can easily cause the membrane roll to wrinkle. When the diaphragm bends around a series of guide rollers 22, the stress inside its material is released and redistributed to a certain extent. This process helps eliminate curling, warping, or slight wrinkles that may occur during diaphragm unfolding, allowing the diaphragm to pass through the slitting blade in a very flat state. Since the guide shaft 21 is rotatably connected to the frame 1, the guide roller 22 can passively rotate very smoothly as the diaphragm advances. This rolling friction is far less than sliding friction, minimizing wear and scratches on the diaphragm surface, which is crucial for protecting the integrity of this material, which is extremely sensitive to surface defects.
[0020] Reference Figure 1-4 The longitudinal moving mechanism 3 includes a mounting base 31. The top of the frame 1 is fixedly connected to the mounting base 31. The top of the mounting base 31 is fixedly connected to two slide rails 32. The top of each slide rail 32 is slidably connected to two sliders 33. The tops of the four sliders 33 are fixedly connected to the longitudinal moving base 34. The bottom of the longitudinal moving base 34 is fixedly connected to a threaded sleeve 35. The rear end of the mounting base 31 is fixedly connected to a drive motor 36. The output end of the drive motor 36 is fixedly connected to a lead screw 37. The lead screw 37 is threaded to the inside of the threaded sleeve 35 and rotatably connected to the inside of the mounting base 31. With the above structural setup, when the position of the slitting head needs to be adjusted (for example, after changing to a diaphragm roll of different widths, the cutter needs to be aligned with the effective area of the diaphragm), the drive motor 36 (usually a servo motor or stepper motor) starts, and its output begins to rotate precisely. The output of the drive motor 36 directly drives the lead screw 37 to rotate. The lead screw 37 is a precision threaded shaft, which is rotatably connected to the inside of the mounting base 31 through bearings and other support structures, ensuring that it can rotate smoothly without axial movement. The threaded sleeve 35 has threads inside that match the lead screw 37, and it is fixed to the bottom end of the longitudinal moving base 34. Since the threaded sleeve 35 is connected to the slide rail 32 through the longitudinal moving base 34 and the slider 33, it cannot rotate on its own. Therefore, when the lead screw 37 rotates, the threaded sleeve 35, due to the restriction of the anti-rotation structure, will convert the rotational motion of the lead screw 37 into its own precise linear motion. This principle is similar to a nut moving on a rotating screw. When linear motion occurs, the longitudinal moving base 34 is the core load platform. It sits atop two slide rails 32 via four sliders 33 at the bottom. The slide rails 32 and sliders 33 form a high-precision linear guide pair. This ensures that the longitudinal moving seat 34 and all its components (the transverse moving mechanism 4 and the slitting mechanism 5) move strictly along the direction of the slide rails 32 without any deflection or jamming. The slitting mechanism 5 is a cantilever structure, and its weight generates an overturning moment on the moving seat. The distribution of the four sliders 33 on the two slide rails 32 provides strong anti-overturning capability, ensuring smooth and accurate movement. The drive motor 36 drives the lead screw 37 to rotate by a corresponding angle. The pitch of the lead screw 37 is fixed, so the movement distance of the threaded sleeve 35 is strictly proportional to the number of revolutions of the lead screw 37. Through the precise control of the servo motor, micron-level positioning accuracy can be achieved. When the longitudinal moving seat 34 reaches the preset position, the drive motor 36 stops rotating and remains self-locking, and the entire slitting head is firmly locked in the target position, preventing displacement due to vibration or other reasons during the slitting process.
[0021] Reference Figure 1-4 Among them, the lateral moving mechanism 4 is a linear module, which is fixedly connected to the top of the longitudinal moving seat 34, and the cutting mechanism 5 is fixedly connected to the moving end of the linear module. Through the above structural setup, the longitudinal moving mechanism 3 is responsible for macroscopically adjusting the axial relative position of the slitting head and the diaphragm roll, while the linear module is responsible for microscopically precisely defining the spacing (i.e., slitting width) between each slitting blade. This two-dimensional motion mode of "longitudinal coarse adjustment + transverse fine adjustment" ensures that the slitting blade can always be accurately positioned at the optimal cutting point on the diaphragm width, fully utilizing the efficiency and precision of the equipment.
[0022] Reference Figure 1-4The fixing mechanism 6 includes a rotating seat 61, a rotating seat 61 fixedly connected to the top of the frame 1, a fixed seat 62 fixedly connected to the top of the frame 1, a cylinder 63 fixedly connected to the fixed seat 62, a top head 64 rotatably connected to the outer side of the output end of the cylinder 63, a rotating shaft 65 rotatably connected to the inner side of the rotating seat 61, and the top head 64 connected to the inner side of the rotating shaft 65 through a keyway. The diaphragm cylinder 7 is fixedly connected to the outer side of the rotating shaft 65. With the above-described structure, operators use a crane or forklift to hoist the large roll of diaphragm 7, wound on a paper core tube, onto the equipment. The center hole of the paper core tube of the diaphragm roll 7 is aligned with the rotating shaft 65 already mounted on the rotating seat 61, and then it is pushed horizontally in until the rotating shaft 65 is fully inserted into the paper core tube. At this time, the piston rod of the cylinder 63 is in the retracted state, causing the mandrel 64 to also be in a position away from the rotating shaft 65. The rotating shaft 65 is in a "relaxed" state, with a smaller diameter, making it easier to insert. The cylinder 63 is vented, and its piston rod extends outward, pushing the mandrel 64 axially into the inner side of the rotating shaft 65. Since the mandrel 64 and the rotating shaft 65 are connected by a keyway, the mandrel 64 drives the rotating shaft 65 to rotate along with it as it moves forward. After fixing, the equipment is started. Because the mandrel 64 and the rotating shaft 65 are connected by a keyway, they can reliably transmit torque. At the same time, the rotating connection at the rear end of the mandrel 64 allows the cylinder 63 body to remain stationary with the rotating shaft 65, providing only axial clamping force. When the diaphragm tube 7 runs out of material and needs to be replaced, the piston rod of the cylinder 63 retracts, pulling the mandrel 64 out of the rotating shaft 65. The tensioning mechanism inside the rotating shaft 65 returns to its original state under the action of the spring or after losing pressure, reducing its outer diameter and completely disengaging from the paper core tube. The operator can then easily remove the used paper core tube from the rotating shaft 65 and replace it with a new, fully wound diaphragm tube 7.
[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A slitting device for lithium battery separator production, characterized in that, The machine includes a frame (1), a guide mechanism (2) is provided at the top of the frame (1), a longitudinal moving mechanism (3) is provided at the top of the frame (1) on the left side of the guide mechanism (2), a transverse moving mechanism (4) is provided on the longitudinal moving mechanism (3), a cutting mechanism (5) is provided at the top of the transverse moving mechanism (4), a fixing mechanism (6) is provided at the top of the frame (1), the fixing mechanism (6) is located on the right side of the guide mechanism (2), and a diaphragm tube (7) is provided on the fixing mechanism (6).
2. A slitting device for lithium battery separator production according to claim 1, characterized in that: The guiding mechanism (2) includes a guide shaft (21), the top of the frame (1) is rotatably connected to the guide shaft (21), and a guide roller (22) is fixedly connected to the outside of the guide shaft (21).
3. A slitting device for lithium battery separator production according to claim 1, characterized in that: The longitudinal moving mechanism (3) includes a mounting base (31). The top end of the frame (1) is fixedly connected to the mounting base (31). The top end of the mounting base (31) is fixedly connected to two slide rails (32). The top ends of the two slide rails (32) are slidably connected to two sliders (33). The top ends of the four sliders (33) are fixedly connected to the longitudinal moving seat (34). The bottom end of the longitudinal moving seat (34) is fixedly connected to a threaded sleeve (35). The rear end of the mounting base (31) is fixedly connected to a drive motor (36). The output end of the drive motor (36) is fixedly connected to a lead screw (37). The lead screw (37) is threadedly connected to the inner side of the threaded sleeve (35). The lead screw (37) is rotatably connected to the inner side of the mounting base (31).
4. A slitting device for lithium battery separator production according to claim 3, characterized in that: The lateral moving mechanism (4) is a linear module, which is fixedly connected to the top of the longitudinal moving seat (34), and the cutting mechanism (5) is fixedly connected to the moving end of the linear module.
5. A slitting device for lithium battery separator production according to claim 1, characterized in that: The fixing mechanism (6) includes a rotating seat (61), the top of the frame (1) is fixedly connected to the rotating seat (61), the top of the frame (1) is fixedly connected to the fixing seat (62), the fixing seat (62) is fixedly connected to the cylinder (63), the output end of the cylinder (63) is rotatably connected to the outside of the cylinder (63), the rotating seat (61) is rotatably connected to the rotating shaft (65), the top of the cylinder (64) is connected to the inside of the rotating shaft (65) through a keyway, and the diaphragm cylinder (7) is fixedly connected to the outside of the rotating shaft (65).