A lithium battery separator stretch forming device
By combining limiting components and multi-stage roller structures, the problems of limiting and cooling during the stretching process of lithium battery separators are solved, achieving stable stretching and efficient cooling of materials and improving the forming quality of separators.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 湖北金力新能源有限公司
- Filing Date
- 2025-04-21
- Publication Date
- 2026-06-09
AI Technical Summary
Existing lithium battery separator stretching and forming devices are difficult to effectively limit the material during the stretching process, resulting in material displacement and poor cooling effect.
By employing a limiting component and a multi-stage roller structure, the material is limited and stretched in multiple stages through a combination of heating rollers, slow rollers, first to third stretching rollers and cooling rollers, combined with an electric telescopic rod and a cooling fan. The stretched material is then cooled by blowing air through the cooling fan.
It effectively reduces material misalignment, improves the stability of the stretching process, enhances the cooling effect, and ensures the quality of the diaphragm.
Smart Images
Figure CN224335040U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery separator processing technology, and in particular to a lithium battery separator stretching and forming device. Background Technology
[0002] The lithium battery separator is one of the key internal components of a lithium battery. It is a thin film with a microporous structure located between the positive and negative electrodes of the lithium battery. Its main function is to separate the positive and negative electrodes to prevent them from contacting and short-circuiting. At the same time, it also allows electrolyte ions to pass through, maintaining the necessary electrolyte during electrochemical reactions and forming channels for ion movement. In the production process, a stretching device is used to stretch the separator by the speed difference between the stretching rollers.
[0003] In the prior art, the lithium battery separator stretching and forming device first heats the material through a processing roller, then stretches it through a speed difference of continuously rising rollers, and then cools it through a cooling roller to complete the stretching of the separator. However, it is difficult to effectively limit the two sides of the material when stretching the separator material, which makes the material prone to displacement during the stretching process, thus affecting the stretching effect. Secondly, the simple cooling roller is difficult to effectively cool the stretched separator during high-speed processing. Utility Model Content
[0004] The purpose of this utility model is to provide a lithium battery separator stretching and forming device to solve the problem mentioned in the background art that it is difficult to effectively limit the two sides of the material when stretching the separator material, which makes the material prone to displacement during the stretching process, thus affecting the stretching effect. Secondly, it is difficult for simple cooling rollers to effectively cool the stretched separator during high-speed processing.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a support frame, one side of which is fixedly connected to the bottom of the raw material rack, and the other side of which is fixedly connected to the bottom of the winding rack. A stretching mechanism is provided at the top of the support frame. The stretching mechanism includes a stretching frame, a heating roller, a slow roller, a first stretching roller, a second stretching roller, a third stretching roller, a fast roller, and a cooling roller. A limiting component is provided on the inner wall of the stretching mechanism. The limiting component includes a fixing block, a support plate, an electric telescopic rod, a movable roller frame, and a limiting roller. A cooling mechanism is provided at the top of the support frame. The cooling mechanism includes a support leg, a fixing frame, a cooling frame, a cooling fan, and a protective net.
[0006] In a preferred embodiment, the top of the support frame is fixedly connected to the bottom of the stretching frame, and the inner wall of the stretching frame is rotatably connected to both ends of the heating roller, and the inner wall of the stretching frame is rotatably connected to both ends of the slow roller.
[0007] In a preferred embodiment, the inner wall of the stretching frame is rotatably connected to both ends of the first stretching roller, the inner wall of the stretching frame is rotatably connected to both ends of the second stretching roller, the inner wall of the stretching frame is rotatably connected to both ends of the third stretching roller, and the inner wall of the stretching frame is rotatably connected to both ends of the fast roller.
[0008] In a preferred embodiment, the inner wall of the stretching frame is rotatably connected to both ends of the cooling roller, and the heating roller, slow roller, first stretching roller, second stretching roller, third stretching roller, fast roller and cooling roller are arranged sequentially from the raw material rack to the winding rack, and the slow roller, first stretching roller, second stretching roller, third stretching roller and fast roller are arranged sequentially from slow to fast.
[0009] In a preferred embodiment, both sides of the inner wall of the stretching frame are fixedly connected to one side of the fixing block, and the fixing block is respectively disposed on the top of the heating roller, the first stretching roller, the third stretching roller and the cooling roller, and one side of the fixing block is fixedly connected to one side of the support plate.
[0010] In a preferred embodiment, the top of the support plate is fixedly connected to the bottom of the electric telescopic rod, and the bottom extension end of the electric telescopic rod is fixedly connected to the top of the movable roller frame. The inner wall of the movable roller frame is rotatably connected to both ends of the limiting roller.
[0011] In a preferred embodiment, the top of the support frame is fixedly connected to the bottom of the support leg, and the support leg is located between the winding frame and the cooling roller, with the top of the support leg fixedly connected to the bottom of the fixed frame.
[0012] In a preferred embodiment, the inner wall of the fixing frame is fixedly connected to the outer wall of the cooling frame, and the inner wall of the cooling frame is fixedly connected to the outer wall of the cooling fan through a fixing rod. The upper and lower sides of the cooling frame are fixedly connected to the outer wall of the protective net.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0014] 1. In this utility model, lithium battery separator raw materials are placed on the outer wall of a raw material rack. The raw materials are passed through a heating roller, a slow roller, a first stretching roller, a second stretching roller, a third stretching roller, a fast roller, and a cooling roller. The heating roller heats the material, and the speed difference between the slow roller, the first stretching roller, the second stretching roller, the third stretching roller, and the fast roller stretches the material. At the same time, the two sides of the material are located below the limiting rollers. The electric telescopic rod is activated to move the moving roller frame downward, which in turn causes the limiting rollers to squeeze the top of the material, thereby limiting the material. This facilitates the limiting and stabilization of the material during stretching, thereby reducing the phenomenon of material deviation.
[0015] 2. In this utility model, the stretched material is first cooled by the cooling roller, and then the stretched material passes through the bottom of the fixed frame. The cooling fan is turned on to generate airflow, which cools the material passing through the bottom of the fixed frame. The cooled material is then wound up by the winding frame, which increases the cooling effect of the stretched material and makes up for the problem of insufficient cooling by a single cooling roller. Attached Figure Description
[0016] Figure 1 A schematic diagram of a lithium battery separator stretching and forming device provided by this utility model;
[0017] Figure 2 A schematic diagram of the stretching mechanism of a lithium battery separator stretching and forming device provided by this utility model;
[0018] Figure 3 A cross-sectional view of the cooling mechanism of a lithium battery separator stretching and forming device provided by this utility model;
[0019] Figure 4 A cross-sectional view of the limiting component of a lithium battery separator stretching and forming device provided by this utility model.
[0020] Legend:
[0021] 1. Support frame; 2. Raw material rack; 3. Rewinding rack; 4. Stretching mechanism; 401. Stretching frame; 402. Heating roller; 403. Slow speed roller; 404. First stretching roller; 405. Second stretching roller; 406. Third stretching roller; 407. Fast speed roller; 408. Cooling roller; 5. Limiting assembly; 501. Fixing block; 502. Support plate; 503. Electric telescopic rod; 504. Moving roller frame; 505. Limiting roller; 6. Cooling mechanism; 601. Support leg; 602. Fixing frame; 603. Cooling rack; 604. Cooling fan; 605. Protective net. Detailed Implementation
[0022] 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.
[0023] Please see Figures 1-4This utility model provides a technical solution comprising: a support frame 1, one side of the top of the support frame 1 being fixedly connected to the bottom of the raw material rack 2, and the other side of the top of the support frame 1 being fixedly connected to the bottom of the winding rack 3; a tensioning mechanism 4 being provided on the top of the support frame 1, the tensioning mechanism 4 comprising a tensioning frame 401, a heating roller 402, a slow roller 403, a first tensioning roller 404, a second tensioning roller 405, a third tensioning roller 406, a fast roller 407, and a cooling roller 408; a limiting component 5 being provided on the inner wall of the tensioning mechanism 4, the limiting component 5 comprising a fixing block 501, a support plate 502, an electric telescopic rod 503, a movable roller frame 504, and a limiting roller 505; and a cooling mechanism 6 being provided on the top of the support frame 1, the cooling mechanism 6 comprising a support leg 601, a fixing frame 602, a cooling frame 603, a cooling fan 604, and a protective net 605.
[0024] In one embodiment, the top of the support frame 1 is fixedly connected to the bottom of the tension frame 401, and the inner wall of the tension frame 401 is rotatably connected to both ends of the heating roller 402, and the inner wall of the tension frame 401 is rotatably connected to both ends of the slow roller 403.
[0025] Specifically: The material is heated by the heating roller 402, which facilitates the subsequent stretching operation.
[0026] In one embodiment, the inner wall of the stretching frame 401 is rotatably connected to both ends of the first stretching roller 404, the inner wall of the stretching frame 401 is rotatably connected to both ends of the second stretching roller 405, the inner wall of the stretching frame 401 is rotatably connected to both ends of the third stretching roller 406, and the inner wall of the stretching frame 401 is rotatably connected to both ends of the fast roller 407.
[0027] Specifically: the raw material is passed through a heating roller 402, a slow roller 403, a first stretching roller 404, a second stretching roller 405, a third stretching roller 406, a fast roller 407, and a cooling roller 408. The material is heated by the heating roller 402, and then stretched by the speed difference between the slow roller 403, the first stretching roller 404, the second stretching roller 405, the third stretching roller 406, and the fast roller 407.
[0028] In one embodiment, the inner wall of the stretching frame 401 is rotatably connected to both ends of the cooling roller 408, and the heating roller 402, slow roller 403, first stretching roller 404, second stretching roller 405, third stretching roller 406, fast roller 407 and cooling roller 408 are arranged sequentially from the raw material rack 2 to the winding rack 3, and the slow roller 403, first stretching roller 404, second stretching roller 405, third stretching roller 406 and fast roller 407 are arranged sequentially from slow to fast.
[0029] Specifically: The slow roller 403, the first stretching roller 404, the second stretching roller 405, the third stretching roller 406 and the fast roller 407 are set in sequence from slow to fast to form a speed difference, which facilitates the stretching operation. The slow roller 403, the first stretching roller 404, the second stretching roller 405, the third stretching roller 406 and the fast roller 407 are each driven by a separate servo motor, and the speed of the slow roller 403 to the fast roller 407 increases sequentially.
[0030] In one embodiment, both sides of the inner wall of the stretching frame 401 are fixedly connected to one side of the fixing block 501, and the fixing block 501 is respectively disposed on the top of the heating roller 402, the first stretching roller 404, the third stretching roller 406 and the cooling roller 408, and one side of the fixing block 501 is fixedly connected to one side of the support plate 502.
[0031] Specifically, by setting up multiple sets of fixing blocks 501, the stability of the material after stretching is increased.
[0032] In one embodiment, the top of the support plate 502 is fixedly connected to the bottom of the electric telescopic rod 503, and the bottom extension end of the electric telescopic rod 503 is fixedly connected to the top of the movable roller frame 504. The inner wall of the movable roller frame 504 is rotatably connected to both ends of the limiting roller 505.
[0033] Specifically: The electric telescopic rod 503 is activated to drive the moving roller frame 504 to move downward, which in turn drives the limiting roller 505 to squeeze the top of the material, thereby limiting the material and facilitating the limiting and stabilization of the material during stretching, thus reducing the phenomenon of material deviation.
[0034] In one embodiment, the top of the support frame 1 is fixedly connected to the bottom of the support leg 601, and the support leg 601 is located between the winding frame 3 and the cooling roller 408. The top of the support leg 601 is fixedly connected to the bottom of the fixing frame 602.
[0035] Specifically: the stretched material is first cooled by the cooling roller 408, and then the stretched material passes through the bottom of the fixed frame 602. The cooling fan 604 is turned on to generate airflow, which cools the material passing through the bottom of the fixed frame 602.
[0036] In one embodiment, the inner wall of the fixing frame 602 is fixedly connected to the outer wall of the cooling frame 603, and the inner wall of the cooling frame 603 is fixedly connected to the outer wall of the cooling fan 604 through a fixing rod. The upper and lower sides of the cooling frame 603 are fixedly connected to the outer wall of the protective net 605.
[0037] Specifically: the cooled material is wound up by the winding frame 3, which increases the cooling effect on the stretched material and makes up for the problem of insufficient cooling by a single cooling roller 408.
[0038] Working principle: The lithium battery separator raw material is placed on the outer wall of the raw material rack 2. The raw material is passed through the heating roller 402, slow roller 403, first stretching roller 404, second stretching roller 405, third stretching roller 406, fast roller 407 and cooling roller 408 respectively. The heating roller 402 heats the material, and then the material is stretched by the speed difference of the slow roller 403, first stretching roller 404, second stretching roller 405, third stretching roller 406 and fast roller 407. At the same time, the two sides of the material are located below the limiting rollers 505. The electric telescopic rod 503 is activated to drive the moving roller frame 504 to move downward, which in turn drives the limiting rollers 505 to squeeze the top of the material, thereby limiting the material. The stretched material is first cooled by the cooling roller 408, and then the stretched material passes through the bottom of the fixed frame 602. The cooling fan 604 is turned on to generate air force to cool the material passing through the bottom of the fixed frame 602. The cooled material is then wound up by the winding frame 3.
[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A lithium battery separator stretching and forming apparatus, characterized in that, include: A support frame (1) is provided, with one top side of the support frame (1) fixedly connected to the bottom of the raw material rack (2), and the other top side of the support frame (1) fixedly connected to the bottom of the winding rack (3). A tensioning mechanism (4) is provided on the top of the support frame (1). The tensioning mechanism (4) includes a tensioning frame (401), a heating roller (402), a slow roller (403), a first tensioning roller (404), a second tensioning roller (405), a third tensioning roller (406), a fast roller (407), and a cooling mechanism. The inner wall of the stretching mechanism (4) is provided with a limiting component (5), which includes a fixing block (501), a support plate (502), an electric telescopic rod (503), a movable roller frame (504), and a limiting roller (505). The top of the support frame (1) is provided with a cooling mechanism (6), which includes a support leg (601), a fixing frame (602), a cooling frame (603), a cooling fan (604), and a protective net (605).
2. The lithium battery separator stretching and forming apparatus according to claim 1, characterized in that: The top of the support frame (1) is fixedly connected to the bottom of the tension frame (401), and the inner wall of the tension frame (401) is rotatably connected to both ends of the heating roller (402). The inner wall of the tension frame (401) is rotatably connected to both ends of the slow roller (403).
3. The lithium battery separator stretching and forming apparatus according to claim 2, characterized in that: The inner wall of the stretching frame (401) is rotatably connected to both ends of the first stretching roller (404), and the inner wall of the stretching frame (401) is rotatably connected to both ends of the second stretching roller (405), and the inner wall of the stretching frame (401) is rotatably connected to both ends of the third stretching roller (406). The inner wall of the stretching frame (401) is rotatably connected to both ends of the fast roller (407).
4. The lithium battery separator stretching and forming apparatus according to claim 3, characterized in that: The inner wall of the stretching frame (401) is rotatably connected to both ends of the cooling roller (408), and the heating roller (402), slow roller (403), first stretching roller (404), second stretching roller (405), third stretching roller (406), fast roller (407) and cooling roller (408) are arranged sequentially from the raw material rack (2) to the winding rack (3), and the slow roller (403), first stretching roller (404), second stretching roller (405), third stretching roller (406) and fast roller (407) are arranged sequentially from slow to fast.
5. The lithium battery separator stretching and forming apparatus according to claim 1, characterized in that: Both sides of the inner wall of the stretching frame (401) are fixedly connected to one side of the fixing block (501), and the fixing block (501) is respectively set on the top of the heating roller (402), the first stretching roller (404), the third stretching roller (406) and the cooling roller (408). One side of the fixing block (501) is fixedly connected to one side of the support plate (502).
6. The lithium battery separator stretching and forming apparatus according to claim 5, characterized in that: The top of the support plate (502) is fixedly connected to the bottom of the electric telescopic rod (503), and the bottom extension end of the electric telescopic rod (503) is fixedly connected to the top of the movable roller frame (504). The inner wall of the movable roller frame (504) is rotatably connected to both ends of the limiting roller (505).
7. The lithium battery separator stretching and forming apparatus according to claim 1, characterized in that: The top of the support frame (1) is fixedly connected to the bottom of the support leg (601), and the support leg (601) is located between the winding frame (3) and the cooling roller (408). The top of the support leg (601) is fixedly connected to the bottom of the fixing frame (602).
8. The lithium battery separator stretching and forming apparatus according to claim 7, characterized in that: The inner wall of the fixed frame (602) is fixedly connected to the outer wall of the cooling frame (603), and the inner wall of the cooling frame (603) is fixedly connected to the outer wall of the cooling fan (604) through a fixed rod. The upper and lower sides of the cooling frame (603) are fixedly connected to the outer wall of the protective net (605).