Powder mixing device for dry-method electrode
By using a combination of mixing, stirring, and ultrasonic structures in dry electrode manufacturing, the problem of uneven powder mixing was solved, achieving efficient and precise powder mixing, thus improving product quality and processing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 广东鹏锦智能装备股份有限公司
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-24
AI Technical Summary
In the dry electrode manufacturing process, uneven powder mixing, especially due to the damp caking of the binder and the mixing difficulties caused by the density difference of the active material powder, affects product quality and processing efficiency.
It employs a combination of mixing, stirring, and ultrasonic structures, including a mixing tank, stirring components, and an ultrasonic generator. By tumbling, shearing, and impacting the powder, combined with ultrasonic vibration to remove adhering substances, it achieves efficient and uniform mixing.
It significantly improves the uniformity and efficiency of powder mixing, reduces caking and sticky particles, enhances mixing quality, and facilitates equipment cleaning.
Smart Images
Figure CN224156745U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of powder mixing equipment technology, and in particular to a powder mixing device for dry electrode. Background Technology
[0002] In the dry electrode manufacturing process, the degree of uniform mixing of raw material powders has a direct impact on the yield and electrochemical performance of dry electrodes. Effective powder mixing can improve the quality, uniformity and efficiency of subsequent processing, and is the basis for the subsequent processing technology of dry electrodes.
[0003] Because the binders used in dry electrode manufacturing can easily cause powder to stick together, such as polytetrafluoroethylene powder, which is prone to damp caking or sticky lumps during mixing, making it difficult to mix evenly. These lumps have strong binding force and are not easy to break up. When using conventional mixing equipment, these lumps can easily stick to the inner wall of the equipment, affecting the degree of mixing uniformity. In addition, the density difference between the active material powder and the binder is large. These factors make it difficult to mix the powder and affect the quality of the finished product. Utility Model Content
[0004] The purpose of this application is to provide a powder mixing device for dry electrodes, which aims to improve the mixing uniformity of powder materials, increase mixing efficiency, and improve mixing quality.
[0005] This application provides a powder mixing device for dry electrodes, including a base, a mixing structure disposed on the base, a stirring structure disposed on the mixing structure, and an ultrasonic structure; the mixing structure includes a powder mixing tank rotatably connected to the base and a mixing drive for driving the powder mixing tank; the stirring structure includes a stirring assembly disposed on one side of the powder mixing tank, the stirring assembly including a rotating shaft rotatably connected to the powder mixing tank, a plurality of rotating blades disposed on the rotating shaft, and the stirring drive; the ultrasonic structure is disposed on the outer wall of the powder mixing tank.
[0006] Furthermore, there are two stirring components, which are respectively disposed on both sides of the mixing tank.
[0007] Furthermore, a plurality of the rotating cutters are uniformly arranged along the length direction of the rotating axis, and the rotating cutters include a plurality of shearing blades arranged along the circumferential direction of the rotating axis.
[0008] Furthermore, the mixing powder hopper includes a hopper body, the hopper body having a feed inlet and a discharge inlet; the feed inlet is hinged with a discharge cover and a locking element for locking the discharge cover; the discharge inlet is provided with a discharge hopper and a valve for controlling the opening and closing of the discharge hopper.
[0009] Furthermore, the mixing drive includes a support base disposed on the machine base and a drive motor disposed on the support base, and the mixing powder hopper is disposed on the output shaft of the drive motor.
[0010] Furthermore, the base has a motor compartment, and the support base and drive motor are located inside the motor compartment.
[0011] Furthermore, the ultrasonic structure includes an ultrasonic generator and a transducer connected to the ultrasonic generator; the transducer is attached to the outer wall of the mixing powder barrel and faces the interior of the mixing powder barrel.
[0012] Furthermore, the base is provided with at least one stabilizing plate for increasing the support area; the stabilizing plate is arranged along the circumferential direction of the base.
[0013] The beneficial effects of this application are:
[0014] 1. The powder mixing device for dry electrodes of this application, by setting a mixing structure, a stirring structure and an ultrasonic structure, when the powder mixing device is running, the mixing drive will drive the powder mixing barrel to rotate, so that the powder in the powder mixing barrel will roll up and down and convect left and right to diffuse and mix evenly; while rolling, the stirring drive will drive the rotating blade to rotate, the rotating blade will shear and strike the powder to effectively break up the caking particles and sticky particles in the powder, and at the same time solve the problem of uniform mixing between fibers and powder. The two movements superimpose and mix in a unit time, which significantly improves the mixing efficiency and achieves fine mixing. In addition, during or after mixing, the ultrasonic structure can be activated to quickly shake off the powder adhering to the inner wall, which is beneficial for equipment cleaning and maintenance.
[0015] 2. A dry electrode mixing device of this application, by setting stirring components on both sides of the mixing powder barrel, when the mixing powder barrel is turned over, the stirring components on both sides operate simultaneously, which can effectively increase the contact area with the powder, thereby achieving more efficient shearing and impact, thereby further reducing the caking particles and sticky particles in the mixing powder barrel, and improving the mixing efficiency and mixing quality. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a powder mixing device for dry electrodes provided in an embodiment of this application;
[0017] Figure 2 This is a schematic diagram of the mixing structure and stirring structure in the embodiments of this application;
[0018] Figure 3 This is a schematic diagram of the combination structure of the mixing structure and the stirring structure in the embodiments of this application;
[0019] Figure 4 yes Figure 2A magnified view of part A in the middle;
[0020] Figure 5 This is a cross-sectional schematic diagram of a powder mixing device for dry electrodes provided in an embodiment of this application;
[0021] Figure 6 This is another schematic diagram of a powder mixing device for dry electrodes provided in an embodiment of this application;
[0022] Figure 7 yes Figure 2 A magnified view of part B in the diagram.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Base; 11. Motor compartment; 12. Stabilizing plate; 2. Mixing structure; 21. Mixing powder hopper; 211. Bucket body; 2111. Feed inlet; 2112. Discharge inlet; 212. Inlet cover plate; 213. Locking component; 214. Discharge hopper; 215. Valve; 22. Mixing drive component; 221. Support base; 3. Stirring structure; 31. Stirring assembly; 311. Rotating shaft; 312. Rotating cutter; 3121. Shearing blade; 313. Stirring drive component; 4. Ultrasonic structure; 41. Ultrasonic generator; 42. Transducer. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0026] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0028] Reference Figure 1 as well as Figure 2This application provides a powder mixing device for dry electrodes, including a base 1, a mixing structure 2 disposed on the base 1, a stirring structure 3 disposed on the mixing structure 2, and an ultrasonic structure 4. During operation, the mixing structure 2 can rotate relative to the base 1, causing the powder in the mixing structure 2 to tumble vertically and convect horizontally for uniform mixing. Simultaneously, the stirring structure 3 stirs and shears the powder in the mixing structure 2, breaking down clumps and sticky particles. The two movements superimpose and mix within a unit time, significantly improving mixing efficiency and achieving fine mixing. During or after mixing, activating the ultrasonic structure 4 allows powder adhering to the inner wall to be quickly dislodged, facilitating equipment cleaning and maintenance.
[0029] Specifically, the base 1 supports the various structures. A control panel is electrically connected to the surface of the base 1, which controls the mixing structure 2, the stirring mechanism, and the ultrasonic structure 4. At least one stabilizing plate 12 is provided at the bottom of the base 1 to increase the support area. The stabilizing plate 12 is arranged along the circumferential direction of the base 1. In this embodiment, there are two stabilizing plates 12, located on both sides of the bottom of the base 1. The stabilizing plates 12 increase the contact area between the base 1 and the ground, thereby improving the support stability.
[0030] Reference Figure 2 , Figure 3 as well as Figure 4 The mixing structure 2 includes a mixing powder hopper 21 rotatably connected to the base 1 and a mixing drive component 22 for driving the mixing powder hopper 21. The mixing powder hopper 21 includes a hopper body 211, which has a feed inlet 2111 and a discharge inlet 2112. The feed inlet 2111 is hinged to a discharge port cover 212 and a locking component 213 for locking the discharge port cover 212. In this embodiment, the locking component 213 is a latch, with one end of the latch disposed on the discharge port cover 212 and the other end hooked onto the feed inlet 2111. By pulling the latch, the discharge port cover 212 can be locked or unlocked. It is understood that the locking component 213 can also be implemented by a locking structure such as a pin or an electromagnetic lock, whichever is appropriate. Similarly, the discharge port 2112 is provided with a discharge hopper 214 and a valve 215 for controlling the opening and closing of the discharge hopper 214. The valve 215 has a handle, and the valve 215 can be controlled by turning the handle to realize the opening and closing of the discharge hopper 214.
[0031] Reference Figure 2 , Figure 5 as well as Figure 6The mixing drive unit 22 includes a support base 221 mounted on the base 1 and a drive motor mounted on the support base 221. The mixing powder hopper 21 is mounted on the output shaft of the drive motor. To accommodate the installation of the mixing drive unit 22, the base 1 has a motor compartment 11 on top. The support base 221 and the drive motor are located inside the motor compartment 11. The motor compartment 11 is detachably connected to a door panel, which is installed to the motor compartment 11 via a threaded connection for easy removal. Removing the door panel allows for convenient installation and maintenance of the drive motor. The output shaft of the drive motor passes through the base and connects to the mixing powder hopper 21. Driven by the drive motor, the mixing powder hopper 21 rotates, thus achieving a flip, ensuring the mixing efficiency and quality of the materials within the mixing powder hopper 21.
[0032] Reference Figure 2 , Figure 5 as well as Figure 7 The stirring structure 3 includes a stirring assembly 31 disposed on one side of the mixing powder tank 21. The stirring assembly 31 includes a rotating shaft 311 rotatably connected to the mixing powder tank 21, a plurality of rotating blades 312 disposed on the rotating shaft 311, and a stirring drive component 313. In this embodiment, there are two stirring assemblies 31, which are respectively disposed on both sides of the mixing powder tank 21. The two stirring assemblies 31 are symmetrically arranged about the mixing powder tank 21, and the plurality of rotating blades 312 are evenly arranged along the length direction of the rotating shaft 311. The rotating blades 312 include a plurality of shearing blades 3121 arranged circumferentially along the rotating shaft 311. It can be understood that the length of the rotating shaft 311 and the number of rotating blades 312 can be adjusted according to actual needs to adapt to different powders.
[0033] The stirring drive 313 is a servo motor. The rotating shaft 311 is coaxially connected to the output shaft of the servo motor. Under the drive of the servo motor, the rotating shaft 311 rotates, thereby driving the rotating cutter 312 to rotate. The rotating cutter 312 shears and strikes the powder, thereby effectively breaking down the caking particles and sticky particles in the powder. The tumbling, shearing, and striking superimposed mixing within a unit time can significantly improve the mixing efficiency and achieve fine mixing.
[0034] Looking back Figure 1 An ultrasonic structure 4 is disposed on the outer wall of the mixing powder container 21. The ultrasonic structure 4 includes an ultrasonic generator 41 and a transducer 42 connected to the ultrasonic generator 41; the transducer 42 is attached to the outer wall of the mixing powder container 21 and faces the interior of the mixing powder container 21. As needed, during or after mixing, the ultrasonic structure 4 operates, the ultrasonic generator 41 emits an electrical signal, and the transducer 42 converts the electrical signal into high-frequency vibrations that are transmitted to the mixing powder container 21, causing the powder adhering to the mixing powder container 21 to fall off, thereby reducing the amount of powder remaining on the inner wall of the mixing powder container 21.
[0035] The working principle of the dry electrode powder mixing device disclosed in this application is as follows: When using the device, the locking element 213 and the feed port cover 212 are opened, and the powder is fed into the mixing tank 21 from the feed port 2111. The mixing drive 22 drives the mixing tank 21 to rotate, causing the powder to tumble and convect horizontally for uniform mixing. Simultaneously, the stirring drive 313 drives the rotating blade 312 to rotate, which shears and strikes the powder, effectively breaking down clumped and sticky particles. After mixing is complete, the valve 215 is opened, allowing the powder to be discharged from the discharge hopper 214. The ultrasonic generator 41 emits an electrical signal, which is converted into high-frequency vibration by the transducer 42, causing powder adhering to the inner wall to be quickly dislodged, facilitating equipment cleaning and maintenance.
[0036] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.
Claims
1. A powder mixing apparatus for dry electrode manufacturing, comprising a base (1), characterized in that, It also includes a mixing structure (2) disposed on the base (1), a stirring structure (3) disposed on the mixing structure (2), and an ultrasonic structure (4); the mixing structure (2) includes a mixing powder tank (21) rotatably connected to the base (1) and a mixing drive (22) for driving the mixing powder tank (21); the stirring structure (3) includes a stirring assembly (31) disposed on one side of the mixing powder tank (21), the stirring assembly (31) includes a rotating shaft (311) rotatably connected to the mixing powder tank (21), a plurality of rotating blades (312) disposed on the rotating shaft (311), and a stirring drive (313); the ultrasonic structure (4) is disposed on the outer wall of the mixing powder tank (21).
2. The powder mixing device for dry electrode according to claim 1, characterized in that, There are two stirring components (31), which are respectively disposed on both sides of the mixing powder tank (21).
3. The powder mixing device for dry electrode according to claim 1, characterized in that, A plurality of the rotating cutters (312) are uniformly arranged along the length direction of the rotating shaft (311), and the rotating cutters (312) include a plurality of shearing blades (3121) arranged along the circumferential direction of the rotating shaft (311).
4. A powder mixing device for dry electrodes according to any one of claims 1-3, characterized in that, The mixing powder hopper (21) includes a hopper body (211), which has a feed inlet (2111) and a discharge inlet (2112). The feed inlet (2111) is hinged to a discharge cover plate (212) and a locking member (213) for locking the discharge cover plate (212). The discharge inlet (2112) is provided with a discharge hopper (214) and a valve (215) for controlling the opening and closing of the discharge hopper (214).
5. A powder mixing device for dry electrode according to claim 4, characterized in that, The mixing drive unit (22) includes a support base (221) disposed on the base (1) and a drive motor disposed on the support base (221), and the mixing powder hopper (21) is disposed on the output shaft of the drive motor.
6. The powder mixing device for dry electrode according to claim 5, characterized in that, The base (1) has a motor compartment (11), and the support base (221) and the drive motor are located inside the motor compartment (11).
7. The powder mixing device for dry electrode according to claim 1, characterized in that, The ultrasonic structure (4) includes an ultrasonic generator (41) and a transducer (42) connected to the ultrasonic generator (41); the transducer (42) is attached to the outer wall of the mixing powder barrel (21) and faces the interior of the mixing powder barrel (21).
8. The powder mixing device for dry electrode according to claim 1, characterized in that, The base (1) is provided with at least one stabilizing plate (12) for increasing the support area; the stabilizing plate (12) is arranged along the circumferential direction of the base (1).