Battery slurry stirring device and battery production equipment

Abstract

The utility model belongs to the technical field of battery production equipment, and discloses a battery slurry stirring device and battery production equipment. The battery slurry stirring device comprises a frame body, a material barrel, at least one stirring paddle, a rotating shaft, at least one dispersing disc and a connecting assembly, the material barrel is arranged on the frame body and used for containing materials to be stirred. And at least one stirring paddle is arranged on the frame body and extends into the charging basket. The rotating shaft is rotatably arranged on the frame body and vertically extends into the material barrel. The at least one dispersing disc is adjustably arranged on the rotating shaft along the axial direction of the rotating shaft; the connecting assembly is configured to detachably fix the dispersion disc to different axial positions of the rotating shaft. The battery slurry stirring device provided by the utility model can adapt to the quantity of materials in the charging basket, and can adjust the position of the dispersion disc along the axial direction of the rotating shaft, so that the material stirring uniformity can be improved, and the quality of battery slurry is improved. Comprising the battery slurry stirring device, the battery produced by the battery production equipment is higher in quality.

Description

Technical Field

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

[0002] Slurry mixing is a crucial step in battery manufacturing, used to uniformly mix materials containing various raw materials to create battery slurry. Current technologies typically employ mixing devices, which generally consist of a dispersing disc and a stirring paddle. The dispersing disc primarily uses its high-speed rotation to generate strong centrifugal force, throwing the materials apart, while the stirring paddle rotates to push the surrounding materials, causing them to move in a circular, axial, and radial motion, thus achieving uniform mixing. However, traditional mixing devices mostly use fixed dispersing discs. Therefore, when the material in the container is low, the dispersing disc cannot reach the material at the bottom of the container, resulting in uneven mixing and consequently affecting the quality of the battery slurry.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] The purpose of this invention is to provide a battery slurry mixing device and battery production equipment to improve the uniformity of material mixing, thereby improving the quality of battery slurry.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery slurry mixing device, the battery slurry mixing device comprising:

[0007] Frame;

[0008] A material hopper is installed on the frame and is used to hold the material to be stirred.

[0009] At least one stirring paddle is disposed on the frame and extends into the hopper;

[0010] A rotating shaft is rotatably mounted on the frame and extends vertically into the material hopper;

[0011] At least one dispersing disk is adjustablely disposed on the rotating shaft along the axial direction of the rotating shaft;

[0012] The connecting component is configured to detachably secure the dispersing disk to different axial positions of the rotating shaft.

[0013] Preferably, the battery slurry mixing device further includes at least one mixing blade disposed at the bottom of the slurry tank.

[0014] Preferably, the connecting assembly includes a sleeve that is slidably sleeved on the rotating shaft, and at least two of the dispersing disks are sequentially arranged on the sleeve along the axial direction of the sleeve and connected to the rotating shaft through the sleeve.

[0015] Preferably, the connection component further includes:

[0016] A slider and a groove capable of sliding cooperation, wherein the slider is disposed on one of the rotating shaft and the sleeve shaft, and the groove is disposed on the other of the rotating shaft and the sleeve shaft;

[0017] Multiple fixing slots are arranged along the length of the slide groove and are all connected to the slide groove, and the slider can be embedded in any of the fixing slots.

[0018] Preferably, the connecting component further includes a plurality of limiting grooves, which are respectively disposed on the groove wall of each of the fixing grooves. When the slider is embedded in the fixing groove, the slider can engage with any of the limiting grooves.

[0019] Preferably, at least two sliders are provided, and all the sliders are distributed circumferentially around the rotating shaft on the rotating shaft or the sleeve shaft. The number of the sliding grooves corresponds to the number of sliders and is one-to-one.

[0020] Preferably, the battery slurry stirring device further includes a drive assembly, wherein two stirring paddles are provided, and the drive assembly is configured to drive the two stirring paddles to rotate together.

[0021] Preferably, the drive assembly and the two impellers form a dual planetary mixing structure.

[0022] Preferably, the shaft is a solid rod.

[0023] A battery production apparatus includes a coating device and a battery slurry mixing device as described above. The battery slurry mixing device is used to uniformly mix materials to prepare a battery slurry, and the coating device is used to uniformly coat the battery slurry onto an electrode current collector.

[0024] The beneficial effects of this utility model are:

[0025] The battery slurry mixing device provided by this utility model can adapt to the amount of material in the tank and adjust the position of the dispersing disc along the axial direction of the rotating shaft. This can avoid the situation where the dispersing disc cannot reach the material at the bottom of the tank when there is little material in the tank, thereby improving the uniformity of material mixing and improving the quality of battery slurry. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the battery slurry mixing device provided by this utility model;

[0027] Figure 2 This is a longitudinal sectional view of the rotating shaft and connecting assembly provided by this utility model;

[0028] Figure 3 This is a cross-sectional view of the rotating shaft and connecting assembly provided by this utility model.

[0029] In the picture:

[0030] 1. Frame; 2. Material bucket; 3. Agitator; 4. Rotary shaft; 5. Dispersion disc; 6. Connecting assembly; 61. Sleeve shaft; 62. Slider; 63. Slide groove; 64. Fixing groove; 65. Limiting groove; 7. Agitator blade. Detailed Implementation

[0031] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0032] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0034] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0035] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0036] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0037] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0038] Please see Figures 1 to 3 This embodiment provides a battery slurry mixing device, which includes a frame 1, a material tank 2, at least one stirring paddle 3, a rotating shaft 4, at least one dispersing disc 5, and a connecting assembly 6. The material tank 2 is disposed on the frame 1 and is used to hold the material to be mixed. Figure 1 Only a portion of the frame 1 is shown. At least one agitator 3 is mounted on the frame 1 and extends into the material tank 2. A rotating shaft 4 is rotatably mounted on the frame 1 and extends vertically into the material tank 2. At least one dispersing disc 5 is adjustablely mounted on the rotating shaft 4 along its axial direction. A connecting assembly 6 is configured to detachably fix the dispersing disc 5 to different axial positions of the rotating shaft 4.

[0039] This configuration allows for adjustment of the position of the dispersing disc 5 along the axis of the rotating shaft 4, adapting to the amount of material in the material tank 2. This prevents the dispersing disc 5 from failing to reach the bottom of the material tank 2 when there is less material in the material tank 2, thereby improving the uniformity of material mixing and enhancing the quality of the battery slurry.

[0040] It is worth noting that traditional mixing devices mostly only have one agitator 3, which makes it difficult to ensure that all materials are mixed during the mixing process, leading to incomplete mixing and sedimentation problems, which seriously affect the mixing effect of the materials. In addition, when traditional mixing devices are used for low-speed mixing and defoaming, a single agitator 3 cannot ensure that the slurry is evenly distributed, resulting in a situation where the upper layer of the slurry is thin and the lower layer is thick, which has an adverse effect.

[0041] To address the aforementioned issues, in this embodiment, the battery slurry mixing device further includes at least one stirring blade 7 disposed at the bottom of the tank 2. It is understood that the stirring blade 7 at the bottom of the tank 2 works in conjunction with the stirring paddle 3 above it to accelerate the mixing of materials within the entire tank 2. Specifically, the stirring blade 7 at the bottom of the tank 2 agitates the material from the bottom, causing the material to flow upwards. The flow generated by the stirring paddle 3 above cooperates with this upward flow, forming a complex three-dimensional flow field, which promotes the material to reach a uniformly mixed state in a shorter time. It is also understood that during the static process, due to gravity, solid particles (such as active materials, conductive agents, etc.) tend to deposit at the bottom of the tank 2. The stirring blade 7 at the bottom of the tank 2 can directly act on the bottom material, using the shearing and pushing forces generated by rotation to resuspend the deposited material, allowing it to mix thoroughly with other components. For example, in lithium-ion battery slurry, if graphite anode material is deposited at the bottom for a long time, it can lead to uneven composition of the anode coating during coating, affecting battery performance. The bottom stirring blade 7 can effectively prevent this situation.

[0042] To further improve the uniformity of battery slurry mixing, the battery slurry mixing device also includes a drive assembly. Two agitator paddles 3 are provided, and the drive assembly is configured to drive both paddles 3 to rotate simultaneously. It is understood that driving the two paddles 3 to rotate together generates a stronger mixing force, and when the two paddles 3 work simultaneously, the flow fields they generate superimpose and synergize, thereby accelerating the mixing speed of the materials. For example, in the preparation of battery slurry, multiple components such as active materials, conductive agents, and binders need to be thoroughly mixed. Simultaneous mixing by two paddles 3 allows these components to reach a uniform mixing state more quickly, reducing mixing time and improving production efficiency. Furthermore, the two paddles 3 can cover a larger mixing area, reducing dead zones. In a large container 2, a single paddle 3 may not be able to fully mix the material at the edges or corners of the container 2, while two paddles 3 can mix the material from different positions, ensuring that the material is fully mixed throughout the entire container 2, avoiding localized incomplete mixing and improving the overall uniformity of the material.

[0043] In this embodiment, the drive assembly and two stirring paddles 3 form a double planetary mixing structure. It should be noted that in the double planetary mixing structure, the stirring paddles 3 revolve around the central axis while simultaneously rotating around their own axes. This combined motion of revolution and rotation creates a complex three-dimensional flow field within the material tank 2. For example, revolution can drive the battery slurry to flow from the center to the edge of the tank 2, and also from the edge to the center; while rotation causes the slurry to tumble vertically, forming an axial flow. This ensures that the battery slurry is fully mixed in both horizontal and vertical directions, allowing various components (such as active materials, binders, conductive agents, etc.) to achieve uniform mixing in three-dimensional space, thus improving mixing efficiency. Correspondingly, the drive assembly includes a drive motor and a transmission mechanism. The motor drives the stirring shafts of the two stirring paddles 3 through the transmission mechanism (such as gear transmission, belt transmission, etc.). For example, in some high-precision double planetary mixing structures, gear transmission can ensure precise synchronization of the revolution and rotation speeds of the two stirring shafts. The power of the motor is determined by factors such as the amount and viscosity of the material being mixed, and generally ranges from several kilowatts to tens of kilowatts.

[0044] To improve the ease of adjusting the position of the dispersing discs 5, the connecting assembly 6 includes a sleeve 61 slidably mounted on the rotating shaft 4. At least two dispersing discs 5 are sequentially arranged on the sleeve 61 along its axial direction and connected to the rotating shaft 4 via the sleeve 61. This allows the position of the dispersing discs 5 to be adjusted by sliding the sleeve 61 according to different application scenarios. Furthermore, when a dispersing disc 5 becomes worn, damaged, or requires cleaning, the sleeve 61 can be easily slid off the rotating shaft 4 for maintenance, replacement, or cleaning. This reduces maintenance and time costs for long-term use of the mixing device. In this embodiment, two dispersing discs 5 are provided, and will not be described in detail further.

[0045] Specifically, the connecting component 6 also includes a slider 62 and a slide groove 63 capable of sliding engagement. The slider 62 is disposed on one of the rotating shaft 4 and the sleeve shaft 61, and the slide groove 63 is disposed on the other of the rotating shaft 4 and the sleeve shaft 61. The connecting component 6 also includes a plurality of fixing slots 64, which are arranged along the length direction of the slide groove 63 and are all in communication with the slide groove 63. The slider 62 can be embedded in any of the fixing slots 64. In this embodiment, the slider 62 is disposed on the rotating shaft 4, and the slide groove 63 is disposed on the sleeve shaft 61.

[0046] During adjustment, first rotate the sleeve shaft 61 to allow the slider 62 to slide out of its current fixed groove 64 and into the slide groove 63. Then, slide the sleeve shaft 61 to allow the slider 62 to slide along the slide groove 63 until it reaches the corresponding fixed groove 64. Finally, rotate the sleeve shaft 61 to embed the slider 62 into the fixed groove 64. This configuration securely locks the position of the sleeve shaft 61, ensuring the stability of the dispersing disk 5 during stirring and dispersing. It prevents the sleeve shaft 61 from shifting due to vibration or rotational forces during stirring, thus ensuring the stability and repeatability of the stirring and dispersing effect and guaranteeing the reliability of the stirring device during production. Furthermore, accurately embedding the slider 62 into the corresponding fixed groove 64 ensures that the position of the dispersing disk 5 remains consistent after each adjustment. This is crucial for processes that require repeated production of the same product, ensuring that the configuration of the stirring and dispersing equipment is identical for each production run, contributing to the consistency and repeatability of product quality.

[0047] During the operation of the stirring device, various forces are generated, especially for high-speed or high-torque stirring operations. These forces may cause the slider 62 to loosen or shift from the fixed groove 64. Therefore, the connecting assembly 6 also includes multiple limiting grooves 65, each set on the wall of a fixed groove 64. When the slider 62 is embedded in the fixed groove 64, it can engage with any of the limiting grooves 65. It is understood that by embedding the slider 62 in the fixed groove 64 and then engaging it with the limiting groove 65, the slider 62 can effectively prevent displacement due to vibration, centrifugal force, or other external forces during stirring. In other words, the presence of the limiting groove 65 provides additional constraint to the slider 62, ensuring it is firmly fixed in the required position and guaranteeing the positional stability of the dispersing disk 5.

[0048] Furthermore, at least two sliders 62 are provided, and all sliders 62 are distributed circumferentially around the rotating shaft 4 or the sleeve shaft 61. The number of sliding grooves 63 corresponds to the number of sliders 62, and they are one-to-one. Because at least two sliders 62 are provided and they are distributed circumferentially around the rotating shaft 4, various forces (such as centrifugal force, shear force, torsional force, etc.) from the sleeve shaft 61 and the dispersion disk 5 can be more evenly distributed on the multiple sliders 62 during use. This avoids excessive force on a single slider 62, reduces wear, deformation, or damage caused by excessive local force on the slider 62, and thus extends the service life of the sliders 62 and the entire connecting assembly 6. It should be noted that in this embodiment, two sliders 62 are provided, and the included angle between the two sliders 62 is 180 degrees.

[0049] Generally, when stirring high-viscosity materials, the stirring device requires significant power, which generates a large torque on the rotating shaft 4. To prevent the rotating shaft 4 from deforming under stress and thus affecting the stirring effect, in this embodiment, the rotating shaft 4 is a solid rod. It is understood that a solid rod rotating shaft 4 can better withstand this torque, ensuring the smooth progress of the stirring process. Furthermore, the solid rod also has greater rigidity, preventing large elastic deformation during rotation and ensuring the concentricity of the dispersing disk 5 and the stirring shaft, thus guaranteeing the uniformity and stability of the stirring. This is particularly important for large-scale stirring devices or applications requiring precise stirring.

[0050] This embodiment also provides a battery production apparatus, which includes a coating device and a battery slurry mixing device as described above. The battery slurry mixing device is used to uniformly mix materials to form a battery slurry, and the coating device is used to uniformly coat the battery slurry onto the electrode current collector. It is understood that the battery production apparatus including the above-described battery slurry mixing device produces batteries of higher quality.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery slurry mixing device, characterized in that, The battery slurry mixing device includes: Frame (1); A material bucket (2) is set on the frame (1) and is used to hold the material to be stirred. At least one stirring paddle (3) is disposed on the frame (1) and extends into the hopper (2); A rotating shaft (4) is rotatably mounted on the frame (1) and extends vertically into the material bucket (2); At least one dispersion disk (5) is adjustablely disposed on the rotating shaft (4) along the axial direction of the rotating shaft (4); The connecting component (6) is configured to detachably fix the dispersing disk (5) to different axial positions of the rotating shaft (4).

2. The battery slurry mixing device according to claim 1, characterized in that, The battery slurry mixing device also includes at least one mixing blade (7) disposed at the bottom of the hopper (2).

3. The battery slurry mixing device according to claim 1, characterized in that, The connecting assembly (6) includes a sleeve (61) slidably sleeved on the rotating shaft (4), at least two of the dispersing disks (5) are sequentially arranged on the sleeve (61) along the axial direction of the sleeve (61) and connected to the rotating shaft (4) through the sleeve (61).

4. The battery slurry mixing device according to claim 3, characterized in that, The connection component (6) further includes: A slider (62) and a groove (63) capable of sliding cooperation, wherein the slider (62) is disposed on one of the rotating shaft (4) and the sleeve shaft (61), and the groove (63) is disposed on the other of the rotating shaft (4) and the sleeve shaft (61); Multiple fixing slots (64) are arranged along the length of the slide groove (63) and are all connected to the slide groove (63), and the slider (62) can be embedded in any of the fixing slots (64).

5. The battery slurry mixing device according to claim 4, characterized in that, The connecting component (6) further includes a plurality of limiting grooves (65), which are respectively disposed on the groove wall of each of the fixing grooves (64). When the slider (62) is embedded in the fixing groove (64), the slider (62) can engage with any of the limiting grooves (65).

6. The battery slurry mixing device according to claim 4, characterized in that, At least two sliders (62) are provided, and all the sliders (62) are distributed around the rotating shaft (4) or the sleeve shaft (61) in the circumferential direction. The number of the sliding grooves (63) corresponds to the number of sliders (62) and they are one-to-one.

7. A battery slurry mixing device according to any one of claims 1-6, characterized in that, The battery slurry mixing device also includes a drive assembly, and two mixing paddles (3) are provided. The drive assembly is configured to drive the two mixing paddles (3) to rotate together.

8. The battery slurry mixing device according to claim 7, characterized in that, The drive assembly and the two stirring paddles (3) form a dual planetary stirring structure.

9. The battery slurry mixing device according to claim 1, characterized in that, The shaft (4) is a solid rod.

10. A battery manufacturing apparatus, characterized in that, The device includes a coating apparatus and a battery slurry mixing apparatus as described in any one of claims 1-9, wherein the battery slurry mixing apparatus is used to uniformly mix materials to prepare a battery slurry, and the coating apparatus is used to uniformly coat the battery slurry onto an electrode current collector.

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