Lithium battery binder mixing and stirring dispensing device

Abstract

The utility model discloses a lithium battery binder mixing stirring and blending device, include: the scraping mechanism is located the inside of mixing bucket, including with the mixing bucket inner wall adhesion's stirring scraper, the back of stirring scraper is provided with the guide plate, the both ends fixed connection of guide plate is connected to the connecting frame, the arc scraper is set up to the connecting frame outside, one group connecting frame side fixed connection's motor no.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a lithium battery binder mixing and blending device. Background Technology

[0002] Lithium-ion battery binders are a type of polymer material whose core function is to firmly bond active materials, conductive agents, and current collectors, thereby improving the stability of the electrode structure and cycle performance. Common types include PVDF (used for the positive electrode) and SBR / CMC (used for the negative electrode). They must possess good conductivity, electrochemical stability, and compatibility with the electrolyte, and are key auxiliary materials for ensuring the charge-discharge cycle life and safety performance of lithium-ion batteries.

[0003] When mixing and blending lithium battery binders, some materials tend to adhere to the inner wall of the mixing tank and are difficult to reach by the stirring paddle, resulting in uneven material dispersion and poor mixing effect. This prevents the binder from fully encapsulating the active material and conductive agent, which can easily lead to delamination and powder shedding after the electrode is formed. Ultimately, this affects the cycle stability and discharge performance of the lithium battery. It is necessary to optimize the stirring structure or add dispersion aids to improve this. Utility Model Content

[0004] This invention provides a mixing and blending device for lithium battery binders to solve the above-mentioned problems.

[0005] This utility model provides a lithium battery binder mixing and stirring device, including: The scraping mechanism, located inside the mixing tank, includes a stirring scraper that adheres to the inner wall of the mixing tank, a guide plate on the back of the stirring scraper, a connecting frame fixedly connected to both ends of the guide plate, an arc-shaped scraper on the outer side of the connecting frame, and the output end of a motor fixedly connected to the side of one of the connecting frames, for scraping away the raw materials that adhere to the inside of the mixing tank to make them mix evenly.

[0006] In a lithium battery binder mixing and stirring device according to an embodiment of the present invention, the guide plate is inclined at 15° to the two sets of connecting frames, and the side of the guide plate is parallel to the stirring scraper.

[0007] In a lithium battery binder mixing and stirring device according to an embodiment of the present invention, a connecting collar is fixedly connected to the side of the connecting frame at the bottom end, and an extension stirring rod is movably sleeved inside the connecting collar.

[0008] In a lithium battery binder mixing and stirring device according to an embodiment of the present invention, a second motor is fixedly connected to the bottom end of the mixing tank, an extended stirring rod is fixedly connected to the output end of the second motor, a stirrer is fixedly connected to the top end of the extended stirring rod, and the stirrer is disposed on the inner wall of the mixing tank.

[0009] In a lithium battery binder mixing and blending device according to an embodiment of the present invention, extension sleeves are fixedly connected to both ends of the side of the stirring scraper, and five sets of extension sleeves are fixedly connected to the inner wall of the arc-shaped scraper, three of which are arranged in a circumferential array, and the other two sets of extension sleeves are arranged in a linear array with the adjacent set.

[0010] In a lithium battery binder mixing and blending device according to an embodiment of the present invention, a limiting push plate is fixedly connected to the side of the extension sleeve rod, and a spring is fixedly connected to the outer wall of the limiting push plate.

[0011] In a lithium battery binder mixing and stirring device according to an embodiment of the present invention, both the upper and lower ends of the mixing barrel are conical, and both the upper and lower ends of the mixing barrel are fixedly connected to inlet and outlet pipes.

[0012] In the lithium battery binder mixing and stirring device of one embodiment of the present invention, the arc-shaped scraper is arc-shaped, and the outer wall of the arc-shaped scraper is in contact with the upper and lower ends of the inner wall of the mixing tank.

[0013] The technical solutions provided in this application embodiment can include the following beneficial effects: This application designs a lithium battery binder mixing and stirring device, which can thoroughly scrape off the attached material and achieve uniform mixing throughout the entire area by using a stirring scraper and an arc-shaped scraper that are in contact with the barrel wall, in conjunction with a two-way stirring system. This solves the problem of dead corner residue in traditional stirring. The spring buffer design ensures that the scraper is always in close contact with the barrel wall, which not only ensures the cleaning effect but also avoids equipment wear, significantly improving the binder mixing quality and equipment durability.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

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

[0016] Figure 1 This is a schematic diagram of the structure of a lithium battery binder mixing and stirring device provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the vertical section structure; Figure 3 yes Figure 1 A partial structural appearance diagram; Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure; Figure 5 yes Figure 3 A schematic diagram of a partial cross-section structure; Figure 6 yes Figure 5 Enlarged view of section A.

[0017] Explanation of reference numerals in the attached figures: 1. Mixing tank; 2. Motor 1; 3. Motor 2; 4. Connecting frame; 5. Agitator; 6. Arc-shaped scraper; 7. Inlet and outlet pipes; 8. Guide plate; 9. Agitating scraper; 10. Connecting collar; 11. Extension sleeve; 12. Limiting push plate; 13. Spring; 14. Extension stirring rod. Detailed Implementation

[0018] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] like Figures 1 to 6As shown, this application provides a lithium battery binder mixing and stirring device, including: a scraping mechanism located inside a mixing tank 1, including a stirring scraper 9 that is attached to the inner wall of the mixing tank 1, a guide plate 8 provided on the back of the stirring scraper 9, a connecting frame 4 fixedly connected to both ends of the guide plate 8, an arc-shaped scraper 6 provided on the outer side of the connecting frame 4, and the output end of a motor 2 fixedly connected to the side of one set of connecting frames 4, for scraping off the raw materials attached to the inside of the mixing tank 1 to make them mix evenly.

[0022] After adopting the above technical solution, the motor 2 drives the connecting frame 4 to drive the stirring scraper 9 and the arc-shaped scraper 6 to rotate synchronously. The stirring scraper 9 closely adheres to the barrel wall to scrape off the attached material, the guide plate 8 guides the scraped material to the stirring area, and the arc-shaped scraper 6 assists in cleaning the corner residue, achieving full-area scraping without dead corners, effectively solving the problem of uneven mixing caused by material adhesion, improving the dispersion effect of the binder, and completing the scraping and guiding simultaneously without additional operation.

[0023] In an optional embodiment, the guide plate 8 is inclined at 15° to the two sets of connecting frames 4, and the side of the guide plate 8 is parallel to the stirring scraper 9.

[0024] This tilting angle design allows the guide plate 8 to generate centripetal thrust when rotating with the connecting frame 4, precisely pushing the scraped material to the mixing zone in the middle of the mixing tank 1, preventing the scraped material from accumulating again near the tank wall. At the same time, the side parallel to the mixing scraper 9 can reduce the material flow resistance, improve guiding efficiency, ensure that the material quickly participates in secondary mixing, and enhance the overall mixing uniformity.

[0025] In an optional embodiment, a connecting collar 10 is fixedly connected to the side of the connecting frame 4 at the bottom end, and an extension stirring rod 14 is movably sleeved inside the connecting collar 10.

[0026] The movable sleeve structure of the connecting collar 10 and the extended stirring rod 14 not only ensures that the extended stirring rod 14 is not disturbed by the connecting frame 4 when it rotates independently, but also restricts the radial displacement of the connecting frame 4 through the connecting collar 10, thereby enhancing the stability of the scraping mechanism. During operation, the two can work together without adjusting their positions.

[0027] In one optional embodiment, a motor 3 is fixedly connected to the bottom end of the mixing tank 1, an extension stirring rod 14 is fixedly connected to the output end of the motor 3, and a stirrer 5 is fixedly connected to the top end of the extension stirring rod 14. The stirrer 5 is disposed on the inner wall of the mixing tank 1.

[0028] Motor 2 3 drives the extended stirring rod 14 to drive the stirrer 5 to rotate at high speed, forming a two-way stirring system with the scraping mechanism driven by motor 1 2. The stirrer 5 generates vortex stirring in the middle area, while the scraping mechanism scrapes and guides in the barrel wall area. The speed of both can be adjusted independently to meet the mixing needs of binders with different viscosities. The internal and external linkage increases the material collision frequency and shortens the mixing time. Furthermore, the stirrer 5 is set close to the inner wall to further enhance the stirring intensity in the edge area.

[0029] In one optional embodiment, extension sleeves 11 are fixedly connected to both ends of the side of the stirring scraper 9, and five sets of extension sleeves 11 are fixedly connected to the inner wall of the arc-shaped scraper 6, three of which are arranged in a circumferential array, and the other two sets of extension sleeves 11 are arranged in a linear array with the adjacent set.

[0030] Multiple sets of extension sleeves 11 are connected to the stirring scraper 9 and the arc-shaped scraper 6 in different arrays. The circumferential array of sleeves can evenly distribute the force on the arc-shaped scraper 6, while the linear array of sleeves strengthens the connection stability between the scraper and the scraper, ensuring that the fit between the scraper and the barrel wall is not affected by vibration when rotating at high speed. At the same time, the length design of the extension sleeves 11 can adapt to the curvature changes of the mixing barrel 1, so that the arc-shaped scraper 6 can fit tightly against the conical area and improve the cleaning effect of the corners.

[0031] In an optional embodiment, a limiting push plate 12 is fixedly connected to the side of the extension rod 11, and a spring 13 is fixedly connected to the outer wall of the limiting push plate 12.

[0032] Spring 13 applies continuous elastic force to extension sleeve 11 through limit push plate 12, so that stirring scraper 9 and arc scraper 6 always keep in close contact with the barrel wall. When encountering local protrusions or material agglomeration, spring 13 can generate buffer deformation to avoid rigid collision between scraper and barrel wall, which would cause wear. At the same time, the elastic force can automatically adjust the contact force according to the material resistance, which not only ensures the scraping effect but also protects the equipment parts and extends the service life. During operation, there is no need to frequently adjust the scraper position to adapt to different working conditions.

[0033] In one optional embodiment, both the upper and lower ends of the mixing tank 1 are conical, and both the upper and lower ends of the mixing tank 1 are fixedly connected to the inlet and outlet pipes 7.

[0034] The conical design creates a converging space at both ends, reducing material residue in corners. Combined with the arc-shaped scraper 6, it can quickly push the material in the conical area to the central mixing zone.

[0035] In one optional embodiment, the arc-shaped scraper 6 is arc-shaped, and the outer wall of the arc-shaped scraper 6 is in contact with the upper and lower ends of the inner wall of the mixing tank 1.

[0036] The arc of the arc-shaped scraper 6 perfectly matches the curvature of the conical area of ​​the mixing tank 1. When rotating, it can fully cover the inner walls of the upper and lower ends of the conical shape, thoroughly scraping away the attached material. This avoids the blind spots in the conical area that traditional straight scrapers can have. At the same time, the arc structure can reduce the material resistance during scraping, making the scraper rotate more smoothly. Combined with the buffering effect of the spring 13, it can reduce energy consumption and improve the stability of equipment operation while ensuring the cleaning effect.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A lithium battery binder mixing and blending device, characterized in that, include: The scraping mechanism is located inside the mixing tank (1) and includes a stirring scraper (9) that is attached to the inner wall of the mixing tank (1), a guide plate (8) provided on the back of the stirring scraper (9), a connecting frame (4) fixedly connected to both ends of the guide plate (8), an arc-shaped scraper (6) provided on the outside of the connecting frame (4), and the output end of a motor (2) fixedly connected to the side of one of the connecting frames (4) for scraping off the raw materials attached to the inside of the mixing tank (1) to make them mix evenly.

2. The lithium battery binder mixing and blending device according to claim 1, characterized in that, The guide plate (8) is inclined at 15° to the two sets of connecting frames (4), and the side of the guide plate (8) is parallel to the stirring scraper (9).

3. The lithium battery binder mixing and stirring apparatus according to claim 1, characterized in that, A connecting ring (10) is fixedly connected to the side of the connecting frame (4) at the bottom end, and an extension stirring rod (14) is movably sleeved inside the connecting ring (10).

4. The lithium battery binder mixing and stirring apparatus according to claim 1, characterized in that, The bottom of the mixing tank (1) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to an extension stirring rod (14), the top end of the extension stirring rod (14) is fixedly connected to a stirrer (5), and the stirrer (5) is set on the inner wall of the mixing tank (1).

5. The lithium battery binder mixing and blending apparatus according to claim 1, characterized in that, The stirring scraper (9) has extension sleeves (11) fixedly connected to both ends of its side. The inner wall of the arc-shaped scraper (6) has five sets of extension sleeves (11), three of which are arranged in a circular array, and the other two sets of extension sleeves (11) are arranged in a linear array with the adjacent set.

6. The lithium battery binder mixing and blending apparatus according to claim 5, characterized in that, The side of the extension sleeve (11) is fixedly connected to a limiting push plate (12), and a spring (13) is fixedly connected to the outer wall of the limiting push plate (12).

7. The lithium battery binder mixing and stirring apparatus according to claim 1, characterized in that, The mixing tank (1) is conical at both the top and bottom, and inlet and outlet pipes (7) are fixedly connected to both the top and bottom of the mixing tank (1).

8. The lithium battery binder mixing and blending apparatus according to claim 1, characterized in that, The arc-shaped scraper (6) is arc-shaped, and the outer wall of the arc-shaped scraper (6) is in contact with the upper and lower ends of the inner wall of the mixing tank (1).

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