Flattening mechanism and coating machine
By smoothing the electrode sheets using ultrasonic waves and a scraper assembly, the problems of grooves and protrusions on the electrode sheets are solved, achieving uniformity in electrode surface density and improving the safety and performance of lithium-ion batteries.
Patent Information
- Application Number
- CN202520131415.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Existing technologies often result in insufficient fusion zones on the electrode, leading to uneven grooves that can easily cause defects such as lines or missing foil, thus affecting the charge and discharge performance of lithium-ion batteries.
The electrode is smoothed using an ultrasonic component and a scraper component. The ultrasonic component vibrates to even out the slurry, while the scraper component scrapes down any protrusions on the slurry surface. Combined with a micro-head to adjust the distance and parallelism between the scraper and the electrode, grooves and protrusions are eliminated.
It effectively eliminates grooves and protrusions on the electrode sheets, improves the uniformity of electrode surface density, avoids defects such as lines and foil leakage, and enhances the safety and performance of the battery.
Smart Images
Figure CN223931813U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coating technology, specifically to a smoothing mechanism and a coating machine. Background Technology
[0002] As the market demands higher and higher current fast charging for lithium-ion batteries, a design with the tabs placed in the center is typically adopted. This involves leaving a square empty foil area in the middle of the coating as the tab, thereby reducing the transmission distance of lithium ions on the electrode, reducing the overall polarization resistance of the battery, and enabling the battery to charge and discharge at high rates.
[0003] The most economical mainstream approach is to use a double-layer die or a single-layer die with a double cavity to fuse two layers of slurry on the electrode. The difficulty of this approach is that insufficient fusion leads to uneven grooves, which can easily cause defects such as lines or foil leakage during rolling. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, this utility model provides a smoothing mechanism and a coating machine, which eliminates grooves on the electrode sheet by using an ultrasonic component and a scraper component, thereby avoiding defects such as lines or foil leakage during rolling and improving the safety factor of the battery.
[0005] On the one hand, the technical solution adopted by this utility model to solve its technical problem is:
[0006] A smoothing mechanism includes a scraper assembly and an ultrasonic component arranged sequentially along the electrode travel direction. The ultrasonic component includes an ultrasonic support and an ultrasonic probe mounted on the ultrasonic support, the ultrasonic probe being used to drive the electrode to vibrate. The scraper assembly includes a scraper support and a scraper, a scraper height adjustment component, and a scraper angle adjustment component mounted on the scraper support. The scraper height adjustment component is used to adjust the distance and parallelism between the scraper and the electrode, and the scraper angle adjustment component is used to adjust the angle of the scraper relative to the electrode.
[0007] As a further improvement to the above technical solution, the scraper bracket includes two parallel support plates and a scraper mounting plate connected between the two support plates. The scraper is mounted on the scraper mounting plate. The support plates are provided with a fixing hole and an arc-shaped waist hole. The end of the scraper mounting plate is provided with a fixed shaft and a movable shaft. The fixed shaft is rotatably connected to the fixing hole, and the movable shaft is slidably connected to the arc-shaped waist hole.
[0008] As a further improvement to the above technical solution, the scraper angle adjusting component includes two first micro-head adjusting structures. The two first micro-head adjusting structures are respectively disposed at both ends of the scraper mounting plate. Each first micro-head adjusting structure includes a first micro-head, a first micro-head fixing seat, and a first elastic element. The first micro-head fixing seat is fixedly connected to the support plate. The first micro-head is mounted on the first micro-head fixing seat and its operating end is connected to the scraper mounting plate. The first elastic element is connected between the scraper mounting plate and the first micro-head fixing seat.
[0009] As a further improvement to the above technical solution, the first elastic element includes a first tension spring and a first spring support. Both the scraper mounting plate and the first micrometer head fixing seat are provided with a first spring support, and the first tension spring is connected between the two first spring supports.
[0010] As a further improvement to the above technical solution, the scraper height adjusting component includes a plurality of second micro-head adjusting structures. The second micro-head adjusting structure includes a second micro-head fixing seat fixedly connected to the scraper mounting plate, a second micro-head on the second micro-head fixing seat, a scraper clamp plate slidably connected to the scraper mounting plate, and a second elastic member connected between the second micro-head fixing seat and the scraper clamp plate. The scraper is mounted on the plurality of scraper clamp plates.
[0011] As a further improvement to the above technical solution, the scraper clamp is slidably connected to the scraper mounting plate via a linear guide rail, the slide rail of the linear guide rail is fixedly connected to the scraper mounting plate, and the slider of the linear guide rail is fixedly connected to the scraper clamp.
[0012] As a further improvement to the above technical solution, the second elastic element includes a second tension spring and a second spring support. Both the scraper clamp and the second micrometer head fixing seat are provided with a second spring support, and the second tension spring is connected between the two second spring supports.
[0013] On the other hand, the present invention also provides the following technical solution:
[0014] A coating machine includes a coating die, a coating roller, and a smoothing mechanism as described above, wherein the scraper assembly of the smoothing mechanism is mounted on the coating die.
[0015] The beneficial effects of this utility model are:
[0016] When grooves appear on the electrode due to unstable surface density of the slurry, the smoothing mechanism of this invention uses ultrasonic vibration below the electrode to vibrate the slurry on the electrode evenly to eliminate the grooves. Then, a micron-level scraper is used above the electrode to smooth out the protrusions on the upper surface of the electrode. The scraper is connected to a micro-head, which finely adjusts the distance and parallelism between the scraper and the electrode, reducing the unevenness of the electrode surface density and avoiding the impact of uneven surface density on battery performance. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is an assembly diagram of a coating machine according to an embodiment of this utility model;
[0019] Figure 2 This is a side view of a coating machine according to an embodiment of the present utility model;
[0020] Figure 3 This is a schematic diagram of the structure of a smoothing mechanism in an embodiment of this utility model. Figure 1 ;
[0021] Figure 4 This is a schematic diagram of the structure of a smoothing mechanism in an embodiment of this utility model. Figure 2 ;
[0022] Figure 5 This is a side view of a smoothing mechanism according to an embodiment of the present utility model;
[0023] Figure 6 This is a side view of a smoothing mechanism according to an embodiment of the present utility model;
[0024] Figure 7 This is an assembly schematic diagram of the first differential head adjustment structure of a smoothing mechanism in an embodiment of this utility model.
[0025] Reference numerals: 1. Coating roller; 2. Coating die; 3. Electrode; 4. Doctor blade assembly; 40. Doctor blade; 41. Support plate; 411. Fixing hole; 412. Arc-shaped waist hole; 42. Doctor blade mounting plate; 43. Doctor blade angle adjustment component; 431. First micrometer head; 432. First micrometer head fixing seat; 433. First tension spring; 434. First spring support; 435. Adjusting block; 44. Doctor blade height adjustment component; 441. Doctor blade clamp; 442. Linear guide rail; 443. Second micrometer head; 444. Second micrometer head fixing seat; 445. Second tension spring; 446. Second spring support; 45. Adjusting plate; 451. Fixed shaft; 452. Movable shaft; 5. Ultrasonic assembly; 51. Ultrasonic support; 52. Ultrasonic probe. Detailed Implementation
[0026] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / installations can use accessories such as screws and bolts, or can be directly connected by welding, bonding, etc. The various technical features in this utility model can be combined interactively without contradicting each other.
[0027] Reference Figure 1 and Figure 2 The present invention provides a coating machine, which includes a coating die head 2, a coating roller 1 and a smoothing mechanism. After coating, the electrode sheet 3 is smoothed by the smoothing mechanism to eliminate grooves on the electrode sheet 3, avoid defects such as lines or foil leakage during rolling, and improve the safety factor of the battery.
[0028] The embodiments of this utility model provide a detailed description of the smoothing mechanism of the coating machine described above, with reference to... Figure 1 and Figure 2 The smoothing mechanism includes a scraper assembly 4 and an ultrasonic component 5 arranged sequentially along the travel direction of the electrode 3. The scraper assembly 4 is mounted on the coating die head 2 of the coating machine and moves forward and backward with the coating die head 2. When the surface density of the slurry on the electrode 3 is uneven, the scraper assembly 4 smooths out the protrusions on the upper surface of the electrode 3. The ultrasonic component 5 includes an ultrasonic bracket 51 and an ultrasonic probe 52 mounted on the ultrasonic bracket 51. The ultrasonic probe 52 contacts the lower surface of the electrode 3. When the surface density of the slurry on the electrode 3 is unstable and grooves appear, ultrasonic vibration is used to vibrate the slurry above the electrode 3 evenly, thereby eliminating the grooves. The ultrasonic frequency of the ultrasonic probe 52 can be adjusted to change the vibration amplitude of the ultrasonic probe 52 according to the different degrees of grooves.
[0029] In this embodiment, refer to Figure 3 and Figure 4 The scraper assembly 4 includes a scraper bracket and a scraper 40, a scraper height adjustment component 44, and a scraper angle adjustment component 43 mounted on the scraper bracket. The scraper height adjustment component 44 is used to adjust the distance and parallelism between the scraper 40 and the electrode 3. The scraper angle adjustment component 43 is used to adjust the angle of the scraper 40 relative to the electrode 3, thereby ensuring the scraper 40 has a smoothing effect on the protruding points of the slurry on the electrode 3.
[0030] Furthermore, refer to Figures 3-5 The scraper support includes two parallel support plates 41 and a scraper mounting plate 42 connected between the two support plates 41. The two support plates 41 are fixedly connected to the coating die head 2. The two ends of the scraper mounting plate 42 are respectively connected to the two support plates 41 through an adjusting plate 45. Specifically, taking a set of adjacent support plates 41 and adjusting plates 45 as an example, the support plate 41 is provided with a fixing hole 411 and an arc-shaped waist hole 412. The adjusting plate 45 is provided with a fixed shaft 451 and a movable shaft 452. The fixed shaft 451 is rotatably connected in the fixing hole 411, and the movable shaft 452 is slidably connected in the arc-shaped waist hole 412. That is, the scraper mounting plate 42 can rotate based on the fixed point and is limited by the arc-shaped waist hole 412.
[0031] It is understood that the scraper angle adjusting member 43 pushes the scraper mounting plate 42 to move, thereby causing it to rotate. Specifically, refer to... Figure 4 The scraper angle adjustment component 43 includes two first micro-head adjustment structures, which are respectively disposed at both ends of the scraper mounting plate 42. The two first micro-head adjustment structures work together to push the scraper mounting plate 42 to move, thereby improving the stability of the equipment structure.
[0032] Reference Figure 6 and Figure 7 The first micrometer head adjustment structure includes a first micrometer head 431, a first micrometer head fixing seat 432, and a first elastic element. The first micrometer head fixing seat 432 is fixedly connected to the support plate 41. The first micrometer head 431 is mounted on the first micrometer head fixing seat 432, and its operating end contacts the adjusting block 435 on the scraper mounting plate 42. The adjusting block 435 is used to reduce the distance between the scraper mounting plate 42 and the first micrometer head 431, facilitating the operation of the first micrometer head 431. The first elastic element is connected between the scraper mounting plate 42 and the first micrometer head fixing seat 432. The first elastic element includes a first tension spring 433 and a first spring support 434. Both the scraper mounting plate 42 and the first micrometer head fixing seat 432 are provided with a first spring support 434, and the first tension spring 433 is connected between the two first spring supports 434. Understandably, by fine-tuning the first differential head 431, and under the action of the first tension spring 433, the scraper mounting plate 42 is moved back and forth, thereby adjusting the angle between the scraper 40 mounted on the scraper mounting plate 42 and the electrode 3.
[0033] In this embodiment, refer to Figure 3 and Figure 4The scraper height adjustment component 44 includes several second micrometer head adjustment structures to adjust the distance and parallelism between the scraper 40 and the electrode 3. For details, refer to... Figure 6 The second micrometer head adjustment structure includes a second micrometer head fixing seat 444 fixedly connected to the scraper mounting plate 42, a second micrometer head 443 on the second micrometer head fixing seat 444, a scraper clamping plate 441 slidably connected to the scraper mounting plate 42, and a second elastic element connected between the second micrometer head fixing seat 444 and the scraper clamping plate 441. The second elastic element includes a second tension spring 445 and a second spring support 446. A second spring support 446 is provided on both the scraper clamping plate 441 and the second micrometer head fixing seat 444. The second tension spring 445 is connected between two second spring supports 446. The scraper 40 is mounted on a plurality of scraper clamping plates 441.
[0034] Understandably, fine-tuning the second micro head 443, under the action of the second tension spring 445, causes the scraper clamp 441 to move toward or away from the electrode 3, thereby adjusting the distance between the scraper 40 and the electrode 3. Specifically, when several second micro heads 443 are fine-tuned simultaneously, the scraper 40 on the scraper clamp 441 is moved, thereby adjusting the distance between the scraper 40 and the electrode 3. When fine-tuning some of the second micro heads 443, the parallelism of the scraper 40 relative to the electrode 3 can be adjusted.
[0035] Furthermore, the scraper clamp 441 is slidably connected to the scraper mounting plate 42 via a linear guide rail 442. The slide rail of the linear guide rail 442 is fixedly connected to the scraper mounting plate 42, and the slider of the linear guide rail 442 is fixedly connected to the scraper clamp 441, thereby improving the reliability of the movement of the scraper clamp 441 and the scraper 40.
[0036] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A smoothing mechanism, characterized in that: The device includes a scraper assembly and an ultrasonic component arranged sequentially along the electrode's travel direction. The ultrasonic component includes an ultrasonic support and an ultrasonic probe mounted on the ultrasonic support, the ultrasonic probe being used to drive the electrode to vibrate. The scraper assembly includes a scraper support and a scraper, a scraper height adjustment component, and a scraper angle adjustment component mounted on the scraper support. The scraper height adjustment component is used to adjust the distance and parallelism between the scraper and the electrode, and the scraper angle adjustment component is used to adjust the angle of the scraper relative to the electrode.
2. The smoothing mechanism according to claim 1, characterized in that: The scraper bracket includes two parallel support plates and a scraper mounting plate connected between the two support plates. The scraper is mounted on the scraper mounting plate. The support plates are provided with a fixing hole and an arc-shaped waist hole. The end of the scraper mounting plate is provided with a fixed shaft and a movable shaft. The fixed shaft is rotatably connected to the fixing hole, and the movable shaft is slidably connected to the arc-shaped waist hole.
3. A smoothing mechanism according to claim 2, characterized in that: The scraper angle adjustment component includes two first micro-head adjustment structures, which are respectively disposed at both ends of the scraper mounting plate. Each first micro-head adjustment structure includes a first micro-head, a first micro-head fixing seat, and a first elastic element. The first micro-head fixing seat is fixedly connected to the support plate. The first micro-head is mounted on the first micro-head fixing seat and its operating end is connected to the scraper mounting plate. The first elastic element is connected between the scraper mounting plate and the first micro-head fixing seat.
4. A smoothing mechanism according to claim 3, characterized in that: The first elastic element includes a first tension spring and a first spring support. Both the scraper mounting plate and the first micrometer head fixing seat are provided with a first spring support, and the first tension spring is connected between the two first spring supports.
5. A smoothing mechanism according to claim 2, characterized in that: The scraper height adjustment component includes several second micro-head adjustment structures. Each second micro-head adjustment structure includes a second micro-head fixing seat fixedly connected to the scraper mounting plate, a second micro-head on the second micro-head fixing seat, a scraper clamp plate slidably connected to the scraper mounting plate, and a second elastic element connected between the second micro-head fixing seat and the scraper clamp plate. The scraper is mounted on several of the scraper clamp plates.
6. A smoothing mechanism according to claim 5, characterized in that: The scraper clamp is slidably connected to the scraper mounting plate via a linear guide rail. The slide rail of the linear guide rail is fixedly connected to the scraper mounting plate, and the slider of the linear guide rail is fixedly connected to the scraper clamp.
7. A smoothing mechanism according to claim 5, characterized in that: The second elastic element includes a second tension spring and a second spring support. Both the scraper clamp and the second micrometer head fixing seat are provided with a second spring support, and the second tension spring is connected between the two second spring supports.
8. A coating machine, characterized in that: It includes a coating die, a coating roller, and a smoothing mechanism as described in any one of claims 1-7, wherein the scraper assembly of the smoothing mechanism is mounted on the coating die.