Lithium battery diaphragm winding machine
By using the gravity compaction and elastic seat combination of the press roller body in the lithium battery separator winder, the problem of adaptability of the thickness of the diaphragm is solved, the flatness and density of the diaphragm are maintained, and the winding quality and stability are improved.
Patent Information
- Application Number
- CN202422227109.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-11
AI Technical Summary
Traditional lithium battery separator winders are difficult to maintain a constant compression force and cannot adapt to changes in the separator thickness, resulting in wrinkles, wrinkles or uneven tightness during the separator winding process, affecting battery quality and assembly process.
The pressing roller body is used to tighten the outer peripheral wall of the winding roller through gravity, and through the cooperation of the elastic seat and the mounting ring, the pressing roller body can automatically adapt to the changes in the thickness of the diaphragm, combine the spring to absorb vibration and impact force, and use adjustment blocks and slide chutes to improve stability, and the positioning blocks and adjustment rods to achieve accurate adjustment.
It improves the quality and efficiency of diaphragm winding, maintains the flatness and density of diaphragm, reduces wrinkles and looseness, and enhances the stability and accuracy of the diaphragm.
Smart Images
Figure CN223162851U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery diaphragms, and specifically relates to a winding machine for lithium battery diaphragms. Background Art
[0002] As a key component of lithium batteries, the performance of lithium battery diaphragms directly affects the safety, energy density, and cycle life of the batteries. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent direct contact between the two poles from causing a short circuit, and allow lithium ions to pass through during the charging and discharging process. Therefore, the flatness and tightness of the diaphragm are crucial for the overall performance of the battery.
[0003] In the traditional winding process of lithium battery diaphragms, as the diaphragms gradually accumulate and thicken on the winding roller, the traditional pressing method often fails to maintain a constant pressing force, resulting in problems such as wrinkles, creases, or uneven tightness during the winding process. These problems not only affect the quality of the diaphragms but also may cause difficulties in the subsequent battery assembly process and reduce the overall performance of the batteries.
[0004] Although there are already various winding machines for lithium battery diaphragms on the market, they still have certain limitations in adapting to changes in diaphragm thickness, maintaining a constant pressing force, and improving the winding quality. For example, some winding machines use mechanical adjustment methods to adjust the pressing force, but this method is complex to operate and difficult to maintain accuracy; some other winding machines use a fixed pressing force design but cannot adapt to changes in diaphragm thickness. Summary of the Utility Model
[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a winding machine for lithium battery diaphragms. The winding machine presses the diaphragms on the outer peripheral wall of the winding roller through the gravity of the roller body, which helps to maintain the flatness and tightness of the diaphragms during the winding process. At the same time, through the cooperation of the elastic seat and the mounting ring, the roller body can automatically adapt to the change in the thickness of the diaphragms during the winding process of the winding roller, improving the quality and efficiency of the diaphragm winding.
[0006] To achieve the above object, according to an embodiment of the first aspect of the present utility model, a lithium battery separator winding machine is proposed, which includes a winding frame, a winding mechanism and a pressure roller mechanism. The winding mechanism includes a power device and a winding roller. The winding roller is rotatably arranged between the winding frames. The power device is arranged on the side wall of the winding frame. The output end of the power device penetrates the side wall of the winding frame and is connected to the winding roller. The pressure roller mechanism is arranged above the winding roller. The pressure roller mechanism includes a pressure roller body, an elastic seat and a mounting ring. An elastic groove is formed on the side wall of the winding frame. The elastic seat is arranged at the top of the elastic groove. The mounting rings are rotatably arranged at both ends of the winding roller. The mounting rings are arranged in the elastic groove, and elastic blocks are arranged on the mounting rings. One end of the elastic block is inserted into the elastic seat and connected with a spring. The pressure roller body presses the outer peripheral wall of the winding roller.
[0007] As a further scheme of the present utility model: an adjusting block is arranged on the side wall of the mounting ring, a sliding groove is formed on the elastic groove, and the adjusting block penetrates the elastic groove and is slidably matched with the sliding groove.
[0008] As a further scheme of the present utility model: the size of the adjusting block is adapted to the sliding groove.
[0009] As a further scheme of the present utility model: a positioning block is arranged on the outer side wall of the winding frame, an adjusting rod is arranged on the adjusting block, the adjusting rod penetrates the positioning block, and an adjusting bolt is arranged on the adjusting rod. The adjusting bolt limits the adjusting rod. The positioning block penetrates the side wall of the winding frame and is fixedly connected with the elastic seat.
[0010] As a further scheme of the present utility model: the adjusting rod is slidably matched with the positioning block, and the adjusting bolt is threadedly connected with the adjusting rod.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] 1. Due to the gravity of the pressure roller body in the present utility model, the separator on the outer peripheral wall of the winding roller is pressed, which helps to keep the flatness and tightness of the separator during the winding process. At the same time, through the cooperation of the elastic seat and the mounting ring, the pressure roller body can automatically adapt to the change of the separator thickness during the winding process of the winding roller, improve the quality of the separator winding, and at the same time, the spring can absorb and relieve the vibration and impact force generated during the winding process, thereby enhancing the stability of the winding machine.
[0013] 2. By setting the cooperation of the adjusting block and the sliding groove in the present utility model, the stability of the pressure roller body during the adaptive pressing of the winding roller is improved, the deviation of the pressure roller body is avoided, and the quality of the separator winding is improved.
[0014] 3. The utility model can achieve precise adjustment of the position of the pressure roller body through the precise cooperation of the positioning block, the adjusting rod and the adjusting bolt; it helps to ensure that the diaphragm always remains flat during the winding process, reduces the phenomena of wrinkles and looseness, and improves the winding accuracy. Description of the Drawings
[0015] Figure 1 It is a schematic three-dimensional structure diagram of a lithium battery separator winding machine.
[0016] Figure 2 It is a schematic three-dimensional structure diagram of the winding frame.
[0017] Figure 3 It is a schematic installation structure diagram of the pressure roller body.
[0018] Figure 4 It is a schematic three-dimensional structure diagram of the pressure roller mechanism.
[0019] Reference numerals in the drawings: 1, winding frame; 11, elastic groove; 12, sliding groove; 2, power device; 21, winding roller; 3, pressure roller body; 4, elastic seat; 41, spring; 5, mounting ring; 51, elastic block; 52, adjusting block; 521, adjusting rod; 6, positioning block; 61, adjusting bolt. Detailed Embodiments
[0020] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] As Figures 1 to 4 shown, a lithium battery separator winding machine includes a winding frame 1, a winding mechanism and a pressure roller mechanism. The winding mechanism includes a power device 2 and a winding roller 21. The winding roller 21 is rotatably arranged between the winding frames 1. The power device 2 is arranged on the side wall of the winding frame 1. The output end of the power device 2 penetrates the side wall of the winding frame 1 and is connected to the winding roller 21. The pressure roller mechanism is arranged above the winding roller 21. The pressure roller mechanism includes a pressure roller body 3, an elastic seat 4 and a mounting ring 5. An elastic groove 11 is opened on the side wall of the winding frame 1. The elastic seat 4 is arranged at the top of the elastic groove 11. The two ends of the winding roller 21 are rotatably provided with the mounting ring 5. The mounting ring 5 is arranged in the elastic groove 11, and an elastic block 51 is arranged on the mounting ring 5. One end of the elastic block 51 is inserted into the elastic seat 4 and connected to a spring 41. The pressure roller body 3 presses the outer peripheral wall of the winding roller 21.
[0022] The lithium battery separator winding machine generates a driving force through a power device 2 such as a motor, thereby driving the winding roller 21 to rotate. After the separator material is processed through previous processes such as stretching and coating, it is fed into the winding machine; as the winding roller 21 rotates, the separator material gradually winds around the outer peripheral wall of the winding roller 21 to form a rolled product.
[0023] The pressing roller body 3 presses the separator on the outer peripheral wall of the winding roller 21 under the action of gravity. This helps to maintain the flatness and tightness of the separator during the winding process. At the same time, through the cooperation of the elastic seat 4 and the mounting ring 5, the pressing roller body 3 can automatically adapt to the change in the thickness of the separator during the winding process of the winding roller 21, improving the precision of the separator winding. At the same time, the spring 41 can absorb and relieve the vibration and impact force generated during the winding process, thereby enhancing the stability of the winding machine.
[0024] The side wall of the mounting ring 5 is provided with an adjusting block 52, a sliding groove 12 is opened on the elastic groove 11, the adjusting block 52 penetrates through the elastic groove 11 and is slidably matched with the sliding groove 12; the size of the adjusting block 52 is adapted to the sliding groove 12.
[0025] By setting the cooperation of the adjusting block 52 and the sliding groove 12, the stability of the pressing roller body 3 during the adaptive pressing of the winding roller 21 is improved, avoiding the deviation of the pressing roller body 3 and improving the quality of the separator winding.
[0026] A positioning block 6 is provided on the outer side wall of the winding frame 1, an adjusting rod 521 is provided on the adjusting block 52, the adjusting rod 521 penetrates through the positioning block 6, and an adjusting bolt 61 is provided on the adjusting rod 521 to limit the adjusting rod 521; the positioning block 6 penetrates through the side wall of the winding frame 1 and is fixedly connected to the elastic seat 4; the adjusting rod 521 is slidably matched with the positioning block 6, and the adjusting bolt 61 is threadedly connected to the adjusting rod 521.
[0027] Through the precise cooperation of the positioning block 6, the adjusting rod 521 and the adjusting bolt 61, the precise adjustment of the position of the pressing roller body 3 can be realized; this helps to ensure that the separator always maintains a flat state during the winding process, reducing the phenomena of wrinkles and looseness and improving the winding precision.
[0028] Working principle of the utility model: The lithium battery separator rewinder generates driving force through a power device 2 such as a motor, thereby driving the winding roller 21 to rotate. After the separator material is processed through previous processes such as stretching and coating, it is fed into the rewinder; as the winding roller 21 rotates, the separator material gradually winds around the outer peripheral wall of the winding roller 21 to form a wound product. During the separator winding process, the pressing roller body 3 presses the separator on the outer peripheral wall of the winding roller 21 under the action of gravity. At the same time, through the cooperation of the elastic seat 4 and the mounting ring 5, the pressing roller body 3 can automatically adapt to the change in the thickness of the separator during the winding process of the winding roller 21, improving the precision of separator winding. At the same time, the spring 41 can absorb and relieve the vibration and impact force generated during the winding process, thereby enhancing the stability of the rewinder.
[0029] The above embodiments are only used to illustrate the technical method of the utility model and not to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the utility model.
Claims
1. A lithium battery separator winding machine, comprising a winding frame (1), a winding mechanism and a pressure roller mechanism. The winding mechanism includes a power device (2) and a winding roller (21). The winding roller (21) is rotatably arranged between the winding frames (1). The power device (2) is arranged on the side wall of the winding frame (1). The output end of the power device (2) penetrates through the side wall of the winding frame (1) and is connected to the winding roller (21). The pressure roller mechanism is arranged above the winding roller (21). It is characterized in that The pressure roller mechanism includes a pressure roller body (3), an elastic seat (4) and a mounting ring (5). An elastic groove (11) is formed on the side wall of the winding frame (1). The elastic seat (4) is arranged at the top of the elastic groove (11). The mounting rings (5) are rotatably arranged at both ends of the winding roller (21). The mounting rings (5) are arranged in the elastic groove (11), and elastic blocks (51) are arranged on the mounting rings (5). One end of the elastic block (51) is inserted into the elastic seat (4) and connected to a spring (41). The pressure roller body (3) presses the outer peripheral wall of the winding roller (21).
2. The winding machine for a lithium battery separator according to claim 1, wherein An adjusting block (52) is arranged on the side wall of the mounting ring (5). A sliding groove (12) is formed on the elastic groove (11). The adjusting block (52) penetrates through the elastic groove (11) and is slidably matched with the sliding groove (12).
3. The winding machine for lithium battery separator according to claim 2, wherein, The size of the adjusting block (52) is adapted to the sliding groove (12).
4. The winding machine for lithium battery separator according to claim 2, wherein A positioning block (6) is arranged on the outer side wall of the winding frame (1). An adjusting rod (521) is arranged on the adjusting block (52). The adjusting rod (521) penetrates through the positioning block (6), and an adjusting bolt (61) is arranged on the adjusting rod (521). The adjusting bolt (61) limits the adjusting rod (521). The positioning block (6) penetrates through the side wall of the winding frame (1) and is fixedly connected to the elastic seat (4).
5. A lithium battery separator rewinder according to claim 4, characterized in that, The adjusting rod (521) is slidably matched with the positioning block (6), and the adjusting bolt (61) is threadedly connected to the adjusting rod (521).