WO2022166470A1 - 一种电池料浆搅拌用三桨式混合搅拌设备 - Google Patents

一种电池料浆搅拌用三桨式混合搅拌设备 Download PDF

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Publication number
WO2022166470A1
WO2022166470A1 PCT/CN2021/141819 CN2021141819W WO2022166470A1 WO 2022166470 A1 WO2022166470 A1 WO 2022166470A1 CN 2021141819 W CN2021141819 W CN 2021141819W WO 2022166470 A1 WO2022166470 A1 WO 2022166470A1
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WIPO (PCT)
Prior art keywords
stirring
shaft
paddle
straight line
dispersing
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PCT/CN2021/141819
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English (en)
French (fr)
Inventor
罗伟彬
梁伟暖
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佛山市宏瑞德新能源精密设备有限公司
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Publication of WO2022166470A1 publication Critical patent/WO2022166470A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
    • B01F27/922—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws with two or more helices, e.g. with intermeshing helices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/93—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B01F27/953—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis using only helical stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/12—Maintenance of mixers using mechanical means
    • B01F35/123—Maintenance of mixers using mechanical means using scrapers for cleaning mixers

Definitions

  • the invention relates to a stirring device, more particularly, to a three-paddle type mixing and stirring device for battery slurry stirring.
  • the battery slurry is the most critical factor affecting the quality of the battery in the whole process of battery pole piece preparation.
  • the battery slurry is formed by uniformly dispersing the active material, binder and conductive agent in a solvent by stirring, and belongs to a typical high-viscosity solid-liquid two-phase suspension system. If the battery slurry is unevenly dispersed, there will be serious agglomeration, and the electrochemical performance of the battery will be affected. A more complex SEI film may be produced at the site, the reversible capacity will be reduced, and there may be local overcharge and overdischarge, or lithium metal may be precipitated, resulting in a potential safety hazard.
  • the binder is unevenly distributed, the bonding force between particles, between particles and the current collector will be too large or too small, and the internal resistance of the electrode in the small part will be large, and even material will be dropped, which will ultimately affect the performance of the entire battery capacity.
  • the applicant has developed a stirring device with high linear speed and good stirring effect.
  • Its stirring structure has been disclosed in the Chinese invention patent application document with the patent number of 201810016259.3.
  • the specific structure includes a planetary motion gear set, a stirring paddle and a stirring
  • the stirring shaft is connected with the planetary motion gear set, and rotates around the center of the planetary motion gear set and rotates with its own central axis, the stirring shaft is provided with more than two, and the lower ends of each stirring shaft are respectively connected with stirring paddles ;
  • the center point of the line connecting the centers of the two stirring shafts is staggered from the center of the planetary motion gear group; when there are more than three stirring shafts, the centers of the stirring shafts are surrounded by a plane.
  • the center point is offset from the center of the planetary motion gear set.
  • the purpose of the present invention is to provide a three-paddle type mixing and stirring equipment for battery slurry stirring with reasonable structure and good stirring effect.
  • a three-paddle type mixing and stirring device for battery slurry stirring comprising a transmission component and a stirring component connected in linkage, the transmission component drives the stirring component to realize revolution and rotation, and the stirring component includes a first stirring shaft with a first stirring paddle ,
  • the second stirring shaft with the second stirring paddle, the third stirring shaft with the third stirring paddle, the first stirring paddle, the second stirring paddle, and the third stirring paddle are all helical structures and their top to bottom
  • the helix angle is 90°
  • the center of the motion trajectory of the first stirring paddle and the revolution center of the stirring assembly form a first straight line
  • the center of the motion trajectory of the second stirring paddle and the revolution center of the stirring assembly form a second straight line
  • the first straight line is formed.
  • the center of the motion trajectory of the three stirring paddles and the revolution center of the stirring assembly form a third straight line, the angle formed by the first straight line and the second straight line is 88°-98°, and the angle formed by the second straight line and the third straight line is 88°-98°.
  • the angle is 88°-98°.
  • multi-directional shearing surfaces from top to bottom are continuously formed according to the direction of the rotation track of the stirring paddles. More shearing surfaces have stronger shearing effect and improve stirring efficiency; there are always mutually shearing parts between the first stirring paddle and the second stirring paddle, the second stirring paddle and the third stirring paddle,
  • the battery slurry located at the mutual shearing position is subjected to stronger and multi-directional mechanical shearing force, which can further disintegrate and homogenize the fine powder or solid particle agglomerates in the solution to obtain sufficiently fine particles.
  • the solid particles are uniformly distributed in the solution to achieve the effect of micro and ultra-fine dispersion, which can significantly improve the comprehensive performance of the slurry.
  • the final battery slurry has better particle size, fineness and viscosity, which greatly improves the battery material.
  • the quality of the pulp; the structure of the entire stirring assembly is more compact and reasonable, so that the entire equipment can have a more reasonable volume; in addition, because the transmission assembly drives the stirring assembly to achieve revolution and rotation, the first stirring paddle, the second stirring During the stirring process of the paddles, on the one hand, they are subjected to the transmission force from the transmission components.
  • the first stirring paddle, the second stirring paddle and the third stirring paddle will switch back and forth between the two shearing states, and the third One state is that the three are tangent in two, and the second state is that the first stirring paddle and the second stirring paddle, the second stirring paddle and the third stirring paddle are in a tangential state, and the first stirring paddle and the third stirring paddle are in a tangential state.
  • the movement mode of the stirring paddle can generate the maximum shearing force and the largest movement shearing space, the stirring effect is the best, and the quality of the battery slurry obtained by stirring is the best;
  • the setting of the scraper can realize stirring When the paddle stirs the battery slurry at the bottom of the barrel, it increases the turning force on the material at the bottom of the barrel to make the battery slurry mix more evenly.
  • the included angle formed by the first straight line and the second straight line and the included angle formed by the second straight line and the third straight line are the same.
  • the structure of the entire stirring assembly is more compact and reasonable, so that the entire equipment can have a more reasonable volume;
  • the three stirring paddles will also generate boosting force to each other, increase the shearing force, and improve the stirring effect.
  • the present invention further provides that the included angle formed by the first straight line and the second straight line is 90°-95°, and the included angle formed by the second straight line and the third straight line is 90°-95°.
  • the applicant has found through many tests that when the angle formed by the first straight line and the second straight line and the angle formed by the second straight line and the third straight line are both 90°-95°
  • the first stirring paddle, the second stirring paddle and the third stirring paddle will switch back and forth between two shearing states.
  • the stirring paddle, the second stirring paddle and the third stirring paddle are in a tangential state, and the first stirring paddle does not interfere with the third stirring paddle; this kind of movement mode of the stirring paddle can generate the maximum shear force and the maximum motion shear. Cut the space, the stirring effect is the best, and the quality of the battery slurry obtained by stirring is the best.
  • the transmission assembly includes a mounting base, a stirring drive motor and a central shaft connected in linkage, the mounting base is axially fixed and circumferentially rotatable on the frame, the central shaft, the first stirring shaft, The second stirring shaft and the third stirring shaft are fixedly connected with the installation base, the surface of the central shaft is fixedly sleeved with a driving gear, the driving gear is meshed with three driven gears, and the three driven gears are respectively linked to the first stirring shaft and the third stirring shaft.
  • the second stirring shaft and the third stirring shaft includes a mounting base, a stirring drive motor and a central shaft connected in linkage, the mounting base is axially fixed and circumferentially rotatable on the frame, the central shaft, the first stirring shaft, The second stirring shaft and the third stirring shaft are fixedly connected with the installation base, the surface of the central shaft is fixedly sleeved with a driving gear, the driving gear is meshed with three driven gears, and the three driven gears are respectively linked to the first stirring shaft and the
  • the transmission component drives the stirring component to achieve revolution and rotation
  • the structure is simple and the layout is compact
  • the stirring track of the stirring component covers more space in the material barrel
  • the stirring is more uniform
  • the quality of the battery slurry obtained is better.
  • the present invention further provides that the stirring assembly further comprises a dispersing shaft and a dispersing disc mounted on the surface of the dispersing shaft, the dispersing shaft is located between the first dispersing shaft and the second stirring shaft, and the dispersing shaft is located between the first dispersing shaft and the second stirring shaft.
  • the second dispersing shaft between the three stirring shafts, the third dispersing shaft located between the second stirring shaft and the third stirring shaft, the diameter of the dispersing disc on the surface of the third dispersing shaft is larger than the diameter of the dispersing disc of the first dispersing shaft, the second dispersing shaft The diameter of the dispersion disc of the dispersion shaft.
  • the larger diameter of the dispersing disc brings higher linear speed and stronger shear force obtained by running at higher linear speed. Under the action of strong mechanical shear force, the fine powder in the solution can be removed.
  • the agglomerates or solid particle agglomerates are further dispersed and homogenized to obtain sufficiently fine solid particles, which are uniformly distributed in the solution to achieve microscopic and ultra-fine dispersion, which can significantly improve the comprehensive performance of the slurry.
  • the final battery slurry It has better particle size, fineness and viscosity, and greatly improves the quality of battery slurry; but in order to increase the linear speed, the diameter of the dispersion disc cannot be blindly increased, because this will affect the load capacity of the dispersion shaft and also affect the drive.
  • the bearing capacity and power requirements of the motor; the setting method of the present invention reasonably increases the linear speed of the stirring device, but does not negatively affect other components, and maximizes the stirring effect of the battery slurry.
  • the present invention further provides that a scraper is provided at the bottom of at least one of the first stirring paddle, the second stirring paddle and the third stirring paddle.
  • At least two scrapers are provided, which are respectively located on both sides of the bottom of the same stirring paddle.
  • the setting of the shovel and scraper can realize that when the stirring paddle stirs the battery slurry at the bottom of the barrel, the material at the bottom of the barrel can be turned over more evenly, so that the battery slurry can be mixed more uniformly.
  • FIG. 1 is a schematic diagram of the overall structure of a three-paddle type mixing and stirring equipment for battery slurry stirring;
  • Fig. 2 is the A-A sectional view of Fig. 1, and the transmission assembly is in the original position;
  • Fig. 3 is the enlarged view of B part of Fig. 2;
  • FIG. 4 is a sectional view taken along the line A-A of FIG. 1 , and the transmission assembly is in a state of being rotated to 90°;
  • Fig. 5 is the C part enlarged view of Fig. 4;
  • FIG. 6 is a partial structural schematic diagram of a three-paddle type mixing and stirring equipment for battery slurry stirring
  • FIG. 7 is a schematic diagram of the motion trajectory of the first stirring paddle, the second stirring paddle and the third stirring paddle when the first stirring shaft, the second stirring shaft and the third stirring shaft are distributed at 120°;
  • FIG. 8 is a schematic diagram of the motion trajectory of the first stirring paddle, the second stirring paddle and the third stirring paddle when the first stirring shaft, the second stirring shaft and the third stirring shaft are distributed at 93°;
  • FIG. 9 is a state diagram of the first stirring paddle, the second stirring paddle, and the third stirring paddle shearing each other at the top;
  • Figure 10 is a state diagram of the first stirring paddle, the second stirring paddle, and the third stirring paddle shearing each other in the middle;
  • Figure 11 is a state diagram of the first stirring paddle, the second stirring paddle, and the third stirring paddle shearing each other at the bottom;
  • Figure 12 is a state diagram of the first stirring paddle, the second stirring paddle, and the third stirring paddle in the middle of the outer edge;
  • Figure 13 is a schematic structural diagram of a stirring paddle.
  • a three-paddle type mixing and stirring equipment for battery slurry stirring includes a frame 1, a transmission assembly 4, a stirring assembly 2, and a bucket 3.
  • the transmission assembly 4 is fixed on the frame 1 and can be To achieve circular rotation, the transmission component 4 drives the stirring component 2 to achieve revolution and rotation.
  • the stirring assembly 2 can be placed in the material barrel 3 to agitate the battery slurry, or can be separated from the material barrel 3 after the stirring is completed.
  • the stirring assembly 2 can be extended into or out of the bucket 3 through the up and down movement of the stirring assembly 2, which will not be repeated here.
  • the transmission assembly 4 includes a mounting base 41, a stirring drive motor 42 and a central shaft 43 connected in linkage, and the mounting base 41 is axially fixed and circumferentially rotatable and is arranged on the frame 1,
  • the central shaft 43 is fixedly connected with the mounting base 41 , and the first stirring shaft 211 , the second stirring shaft 212 and the third stirring shaft 213 are all fixedly connected with the mounting base 41 through the fixing plate 25 ;
  • the driving gear 45, the driving gear 45 is meshed with three driven gears 46, and the three driven gears 46 are respectively linked to the first stirring shaft 211, the second stirring shaft 212, and the third stirring shaft 213;
  • the stirring shaft 212 and the third stirring shaft 213 are respectively fixedly connected to the first stirring paddle 221, the second stirring paddle 222 and the third stirring paddle 223, and the bottom of each stirring paddle is provided with a shovel scraper 220 (it should be noted here that, The scraper 220 may not be provided, or it may be provided at the bottom of the individual stirring paddle
  • the material at the bottom of the barrel can be turned over to make the battery slurry more mixed.
  • the bottoms of the three stirring paddles are provided with scrapers 220).
  • the working process is as follows: the stirring and driving motor 42 is started, and the central shaft 43 is driven to rotate through the transmission belt 441 and the transmission gear 442. Since the central shaft 43 and the installation base 41 are fixedly connected, the entire installation base 41 follows the central shaft 43 on the frame 1. Rotate, so that the three stirring shafts on the mounting base 41 revolve along with it; in addition, when the central shaft 43 rotates, the driving gear 45 on the central shaft 43 rotates along with it, and the three driven gears 46 are axially fixed and circumferentially rotatably fixed. On the installation base 41 , under the meshing transmission of the driving gear 45 , the three driven gears 46 rotate passively, thereby realizing the rotation of the three stirring shafts.
  • the transmission assembly 4 can also control the revolution and rotation of the three stirring shafts respectively through different motors.
  • the technical solution of this embodiment is preferred.
  • the motion trajectories of the three stirring paddles are a, b, and c, respectively.
  • the diameter of the dispersing shaft that can be placed between every two stirring shafts is affected by the motion trajectories of the three stirring paddles, and its diameter is limited, which directly affects the diameter of the dispersing disc, thus affecting the stirring process.
  • the linear velocity of the middle dispersion disc is affected by the motion trajectories of the three stirring paddles, and its diameter is limited, which directly affects the diameter of the dispersing disc, thus affecting the stirring process.
  • the diameter of the dispersion disc is directly increased in order to increase the linear speed, although the linear speed of the dispersion disc can be increased, it will affect the load capacity of the dispersion shaft, and at the same time, the load capacity and power requirements of the drive motor will be greatly improved. Speaking of, the economy is not high.
  • the center of the motion trajectory of the first stirring paddle 221 and the center of revolution of the stirring assembly 2 form a first straight line
  • the center of the motion trajectory of the second stirring paddle 222 and the revolution center of the stirring assembly 2 form a second straight line
  • the center of the motion trajectory of the paddle 223 and the center of revolution of the stirring assembly 2 form a third straight line
  • the angle formed by the first straight line and the second straight line is 88°
  • the angle formed by the second straight line and the third straight line is 88° °.
  • the battery slurry will be subjected to the stirring force formed by the stirring paddle itself, and the other is convenient
  • the shearing force formed between each stirring paddle will be received, and multiple forces will act on the battery slurry, which can further disperse and homogenize the fine powder or solid particle agglomerates in the solution to obtain sufficiently fine particles.
  • the solid particles are uniformly distributed in the solution to achieve the effect of micro and ultra-fine dispersion, which can significantly improve the comprehensive performance of the slurry.
  • the final battery slurry has better particle size, fineness and viscosity, which greatly improves the battery slurry. the quality of.
  • the stirring assembly 2 also includes a dispersing shaft and a dispersing disc mounted on the surface of the dispersing shaft.
  • the dispersing shaft is located between the first stirring shaft 211 and the second stirring shaft 212.
  • the first dispersing shaft 231 is located between the second stirring shaft 212 and the third
  • the second dispersing shaft 232 between the stirring shafts 213, the third dispersing shaft 233 between the second stirring shaft 212 and the third stirring shaft 213, the first dispersing shaft 231 is fixedly provided with the first dispersing plate 241, the second dispersing shaft 232 is fixedly provided with a second dispersion disc 242 , and the third dispersion shaft 233 is fixedly provided with a third dispersion disc 243 .
  • the included angle formed by the first straight line and the second straight line is 90°
  • the included angle formed by the second straight line and the third straight line is 90°
  • the included angle formed by the first straight line and the second straight line is 93°
  • the included angle formed by the second straight line and the third straight line is 93°
  • the three The motion trajectories of the stirring paddles are e, f, and g, respectively.
  • the first stirring paddle 221 , the second stirring paddle 222 and the third stirring paddle 223 will switch back and forth between two shearing states. It is that the first stirring paddle 221 and the second stirring paddle 222, the second stirring paddle 222 and the third stirring paddle 223 are in a tangential state, and the first stirring paddle 221 does not interfere with the third stirring paddle 223, as shown in Figure 9-12. shown.
  • the movement mode of the stirring paddle can continuously generate multi-directional shear force from top to bottom, clockwise/counterclockwise, revolution direction, and rotation direction, and can form the largest movement shear space, stirring The best effect is obtained by stirring the battery slurry with the best quality.
  • the included angle formed by the first straight line and the second straight line is 95°
  • the included angle formed by the second straight line and the third straight line is 95°
  • the included angle formed by the first straight line and the second straight line is 98°
  • the included angle formed by the second straight line and the third straight line is 98°
  • the included angle formed by the first straight line and the second straight line is 88°
  • the included angle formed by the second straight line and the third straight line is 98°
  • the included angle formed by the first straight line and the second straight line is 120°
  • the included angle formed by the second straight line and the third straight line is 120°
  • the shearing of the first stirring paddle 221, the second stirring paddle 222 and the third stirring paddle 223 during stirring does not mean that the stirring paddles are completely fitted together, but It means that there is a small gap between each stirring paddle (such as a gap distance of about 0.1mm-10cm), the gap can be passed through by the battery slurry, and the battery slurry will be subjected to top-to-bottom, clockwise/counterclockwise, The multi-directional shear force in the revolution direction and the rotation direction, and the battery slurry in the gap portion is completely subjected to the shear force.
  • the shear range of the battery slurry is in the order of A +++ > A ++ > A + >A; the uniformity of dispersion is in the order of A +++ > A ++ > A + >A; The order of fluidity is A +++ > A ++ > A + >A; that is, during the stirring process of the battery slurry, the larger the area of the sheared part and the greater the shearing force, the battery The higher the quality of the pulp.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

本发明旨在提供一种电池料浆搅拌用三桨式混合搅拌设备，包括机架、安装在机架上且相互联动连接的传动组件和搅拌组件，传动组件带动搅拌组件实现公转和自转，所述搅拌组件包括带有第一搅拌桨的第一搅拌轴、带有第二搅拌桨的第二搅拌轴、带有第三搅拌桨的第三搅拌轴，第一搅拌桨、第二搅拌桨、第三搅拌桨均为螺旋状结构且其顶部至底部的螺旋角度为90°，所述第一搅拌桨运动轨迹的中心与搅拌组件公转中心形成第一直线，所述第二搅拌桨运动轨迹的中心与搅拌组件公转中心形成第二直线，所述第三搅拌桨运动轨迹的中心与搅拌组件公转中心形成第三直线，所述第一直线与第二直线所形成的夹角为88°-98°，第二直线与第三直线所形成的夹角为88°-98。该一种电池料浆搅拌用三桨式混合搅拌设备具有结构合理、搅拌效果佳的优点。

Description

一种电池料浆搅拌用三桨式混合搅拌设备 技术领域
本发明涉及一种搅拌设备，更具体地说，涉及一种电池料浆搅拌用三桨式混合搅拌设备。
背景技术
电池浆料是整个电池极片制备过程中影响电池质量最关键的因素。电池浆料是由活性物质、粘结剂、导电剂通过搅拌均匀分散于溶剂中形成，属于典型的高粘稠的固液两相悬浮体系。电池浆料如果分散不均，有严重的团聚现象，电池的电化学性能受到影响，如若导电剂分布不均匀，电极在充放电过程中，各处电导率不同会发生不同的电化学反应，负极处可能产生较复杂的SEI膜，可逆容量减小，并伴有局部的过充过放现象或有可能会有锂金属析出，形成安全隐患。如果粘结剂分布不均，颗粒之间、颗粒与集流体之间粘结力出现过大过小的情况，过小部位电极内阻大，甚至会掉料，最终影响整个电池容量的发挥。
电池浆料分散是否均匀，取决于搅拌设备的搅拌分散效果如何。通常来讲，更高的线速度伴随着更高的剪切力，线速度对设备依赖性较高，目前市场上的搅拌设备通常在0-30m/s之间，以便于让客户有更多更好的选择。经过实验证明，如果搅拌设备的线速度如果超过30m/s，容易将电池浆料的粘结剂打坏；如果线速度低于15m/s，则难以对电池浆料起到良好的搅拌效果。
本申请人曾研制出一款线速度高、搅拌效果佳的搅拌设备，其搅拌结构已于专利号为201810016259.3的中国发明专利申请文件中公开，具体结构：包括行星运动齿轮组、搅拌桨和搅拌轴，搅拌轴与行星运动齿轮组传动连接、并绕行星运动齿轮组的中心旋转及以自身中心位轴心旋转，所述搅拌轴设有两根以上，各搅拌轴下端分别连接有搅拌桨；当搅拌轴设有两根时，两根搅拌轴的圆心之间连线的中心点与行星运动齿轮组的中心错开；当搅拌轴设有三根以上时，各搅拌轴的圆心围成平面的中心点与行星运动齿轮组的中心错开。
该设备研制出来并投入市场大量使用后，本申请人发现所述搅拌轴设有两根以上时，搅拌桨之间相互的排布设置位置的不一样，也会对搅拌效果产生不一样的影响。
发明内容
本发明的目的在于提供一种结构合理、搅拌效果佳的一种电池料浆搅拌用三桨式混合搅拌设备。
一种电池料浆搅拌用三桨式混合搅拌设备，包括联动连接的传动组件和搅拌组件，传动组件带动搅拌组件实现公转和自转，所述搅拌组件包括带有第一搅拌桨的第一搅拌轴、带有第二搅拌桨的第二搅拌轴、带有第三搅拌桨的第三搅拌轴，第一搅拌桨、第二搅拌桨、第三搅拌桨均为螺旋状结构且其顶部至底部的螺旋角度为90°，所述第一搅拌桨运动轨迹的中心与搅拌组件公转中心形成第一直线，所述第二搅拌桨运动轨迹的中心与搅拌组件公转中心形成第二直线，所述第三搅拌桨运动轨迹的中心与搅拌组件公转中心形成第三直线，所述第一直线与第二直线所形成的夹角为88°-98°，第二直线与第三直线所形成的夹角为88°-98°。
通过采用上述技术方案，三根搅拌桨在搅拌过程中，相对比传统的两根搅拌桨而言，不间断地形成有自上而下的、按搅拌桨旋转轨迹方向的多向剪切面，数量更多的剪切面，具有更强的剪切效果，提高搅拌效率；在第一搅拌桨与第二搅拌桨、第二搅拌桨与第三搅拌桨之间始终存在着相互剪切的部位，位于该相互剪切部位的电池料浆，受着更强烈的、多方向的向的机械剪切力，能够将溶液中的细微粉团或固体颗粒团聚体进一步打散和均质，得到足够细小的固体颗粒，并均匀分布于溶液中，达到微观超细分散的作用，客显著提高浆料综合性能，最终得到的电池料浆，具有更好的颗粒度、细度和粘度，大力提升电池料浆的质量；整个搅拌组件结构更加紧凑合理，从而使得整个设备可以具有更合理的体积；另外，由于传动组件带动搅拌组件实现公转和自转，则第一搅拌桨、第二搅拌桨、第三搅拌桨在搅拌过程中，一方面受到来自传动组件的传动力，另一方面，三根搅拌桨也会对彼此产生助推力，加大剪切力度，提升搅拌效果；当第一直线与第二直线所形成的夹角、第二直线与第三直线所形成的夹角均为90°时，第一搅拌桨、第二搅拌桨、第三搅拌桨会在两种剪切状态来回切换，第一种状态就是三者两两相切，第二种状态是第一搅拌桨与第二搅拌桨、第二搅拌桨与第三搅拌桨处于相切状态，第一搅拌桨与与第三搅拌桨不干涉；这种搅拌桨的运动方式，能够产生最大的剪切力、最大的运动剪切空间，搅拌效果最佳，搅拌得到的电池料浆质量最佳；铲刮件的设置，可以实现搅拌桨在 料桶底部搅拌电池料浆的时候，对桶底的料加大翻转力度，使电池料浆混合更加均匀。
本发明进一步设置为，所述第一直线与第二直线所形成的夹角和第二直线与第三直线所形成的夹角，二者角度相同。
通过采用上述技术方案，使得整个搅拌组件结构更加紧凑合理，从而使得整个设备可以具有更合理的体积；另外，由于传动组件带动搅拌组件实现公转和自转，则第一搅拌桨、第二搅拌桨、第三搅拌桨在搅拌过程中，一方面受到来自传动组件的传动力，另一方面，三根搅拌桨也会对彼此产生助推力，加大剪切力度，提升搅拌效果。
本发明进一步设置为，所述第一直线与第二直线所形成的夹角为90°-95°，第二直线与第三直线所形成的夹角为90°-95°。
通过采用上述技术方案，经过本申请人的多次试验发现，当第一直线与第二直线所形成的夹角、第二直线与第三直线所形成的夹角均为90°-95°时，第一搅拌桨、第二搅拌桨、第三搅拌桨会在两种剪切状态来回切换，第一种状态就是三者两两相切，第二种状态是第一搅拌桨与第二搅拌桨、第二搅拌桨与第三搅拌桨处于相切状态，第一搅拌桨与与第三搅拌桨不干涉；这种搅拌桨的运动方式，能够产生最大的剪切力、最大的运动剪切空间，搅拌效果最佳，搅拌得到的电池料浆质量最佳。
本发明进一步设置为，所述传动组件包括安装基座、联动连接的搅拌驱动电机与中心轴，安装基座轴向固定、周向旋转地设置于机架上，中心轴、第一搅拌轴、第二搅拌轴、第三搅拌轴均与安装基座固定连接，中心轴表面固定套接有主动齿轮，主动齿轮啮合有三个从动齿轮，三个从动齿轮分别联动连接第一搅拌轴、第二搅拌轴、第三搅拌轴。
通过采用上述技术方案，传动组件带动搅拌组件实现公转和自转，结构简单、布局紧凑，搅拌组件的搅拌轨迹在料桶内覆盖更多的空间，搅拌更加均匀，得到的电池料浆质量更佳。
本发明进一步设置为，所述搅拌组件还包括有分散轴和安装在分散轴表面的分散盘，分散轴位于第一搅拌轴第二搅拌轴之间的第一分散轴、位于第二搅拌轴第三搅拌轴之间的第二分散轴、位于第二搅拌轴第三搅拌轴之间的第三分散轴，第三分散轴表面的分散盘直径均大于第一分散轴的分散盘直径、第二分散轴的分散盘直径。
通过采用上述技术方案，更大的分散盘直径带来更高的线速度、更高线速度运转而得到的更强剪切力，在强烈机械剪切力作用下，能够将溶液中的细微粉团或固体颗粒团聚体进一步打散和均质，得到足够细小的固体颗粒，并均匀分布于溶液中，达到微观超细分散的作用，客显著提高浆料综合性能，最终得到的电池料浆，具有更好的颗粒度、细度和粘度，大力提升电池料浆的质量；但不能为了提高线速度，一味地增加分散盘的直径，因为这将会影响分散轴的负载能力，同时也影响驱动电机的承载能力和功率要求；本发明的设置方式，结构合理地提升了搅拌设备的线速度，但又不对其他部件产生负面影响，最大力度地改善电池料浆的搅拌效果。
本发明进一步设置为，所述第一搅拌桨、第二搅拌桨、第三搅拌桨至少其中一个的底部设有铲刮件。
本发明进一步设置为，所述铲刮件至少设有两个，分别位于同一个搅拌桨的底部的两侧。
通过采用上述技术方案，铲刮件的设置，可以实现搅拌桨在料桶底部搅拌电池料浆的时候，对桶底的料加大翻转力度，使电池料浆混合更加均匀。
附图说明
图1为一种电池料浆搅拌用三桨式混合搅拌设备的整体结构示意图；
图2为图1的A-A向剖视图，且传动组件处于原位状态；
图3为图2的B部放大图；
图4为图1的A-A向剖视图，且传动组件处于旋转到90°状态；
图5为图4的C部放大图；
图6为一种电池料浆搅拌用三桨式混合搅拌设备的部分结构示意图；
图7为第一搅拌轴、第二搅拌轴、第三搅拌轴按120°分布时，第一搅拌桨、第二搅拌桨、第三搅拌桨的运动轨迹示意图；
图8为第一搅拌轴、第二搅拌轴、第三搅拌轴按93°分布时，第一搅拌桨、第二搅拌桨、第三搅拌桨的运动轨迹示意图；
图9为第一搅拌桨、第二搅拌桨、第三搅拌桨于顶部相互剪切状态图；
图10为第一搅拌桨、第二搅拌桨、第三搅拌桨于中间部位相互剪切状态图；
图11为第一搅拌桨、第二搅拌桨、第三搅拌桨于底部相互剪切状态图；
图12为第一搅拌桨、第二搅拌桨、第三搅拌桨于外边中间剪切状态图；
图13为搅拌桨的结构示意图。
1.机架；2.搅拌组件；211.第一搅拌轴；212.第二搅拌轴；213.第三搅拌轴；220.铲刮件；221.第一搅拌桨；222.第二搅拌桨；223.第三搅拌桨；231.第一分散轴；232.第二分散轴；233.第三分散轴；241.第一分散盘；242.第二分散盘；243.第三分散盘；25.固定板；
3.料桶；4.传动组件；41.安装基座；42.搅拌驱动电机；43.中心轴；441.传动带；442传动齿轮；45.主动齿轮；46.从动齿轮。
具体实施例
实施例一
如图1所示，一种一种电池料浆搅拌用三桨式混合搅拌设备，包括机架1、传动组件4、搅拌组件2、料桶3，传动组件4固定在机架1上并可实现圆周转动，传动组件4带动搅拌组件2实现公转和自转。搅拌组件2可以置于料桶3内对电池浆料进行搅拌，也可以在搅拌完毕后脱离料桶3，具体可以通过料桶3的上下升降实现搅拌组件2伸入或脱离料桶3，也可以通过搅拌组件2的上下升降实现搅拌组件2伸入或脱离料桶3，这里不做赘述。
如图2-6所示，所述传动组件4包括安装基座41、联动连接的搅拌驱动电机42与中心轴43，安装基座41轴向固定、周向旋转地设置于机架1上，中心轴43与安装基座41固定连接，第一搅拌轴211、第二搅拌轴212、第三搅拌轴213均通过固定板25与安装基座41固定连接；与中心轴43表面固定套接有主动齿轮45，主动齿轮45啮合有三个从动齿轮46，三个从动齿轮46分别联动连接第一搅拌轴211、第二搅拌轴212、第三搅拌轴213；第一搅拌轴211、第二搅拌轴212、第三搅拌轴213分别固定连接第一搅拌桨221、第二搅拌桨222、第三搅拌桨223，每个搅拌桨的底部都带有铲刮件220(此处需说明是，铲刮件220可以不设置，也可以在个别搅拌桨的底部设置，为了可以实现搅拌桨在料桶底部搅拌电池料浆的时候，对桶底的料加大翻转力度，使电池料浆混合更加均匀，本实施优选3个搅拌桨底部都设置铲刮件220)。
工作过程为：搅拌驱动电机42启动，通过传动带441和传动齿轮442，带动中心轴43转动，由于中心轴43和安装基座41固定连接，整个安装基座41跟着中心轴43在机架1上转动，从而安装基座41上的三根搅拌轴跟着公转；另外，中心轴43在转动时，中心轴43上的主动齿轮45跟着旋转，三个从动齿 轮46轴向固定、周向旋转地固定在安装基座41上，在主动齿轮45啮合传动下，三个从动齿轮46被动旋转，从而实现三根搅拌轴自转。
这里需要说明的是，传动组件4也可以是通过不同的电机分别控制三根搅拌轴的公转和自转，这里为了使得整个设备体积足够小、结构足够紧凑、传动足够稳定，优选本实施例技术方案。
如图7所示，第一搅拌轴211、第二搅拌轴212、第三搅拌轴213呈120°分布时；同样的，第一搅拌桨221、第二搅拌桨222、第三搅拌桨223也是呈120°分布，三根搅拌桨的运动轨迹分别为a、b、c。此时，每两根搅拌轴之间，能放置的分散轴直径受三根搅拌桨的运动轨迹影响，其直径大小有限，从而也就直接影响了分散盘的直径大小，从而也就影响了搅拌过程中分散盘的线速度。
如果为了提高线速度，直接增加分散盘的直径，虽然能够增加分散盘的线速度，但这将会影响分散轴的负载能力，同时也好对驱动电机的承载能力和功率要求大大提升，总体来讲，经济性并不高。
同时，该状态下，三根搅拌桨的运动轨迹虽然有一定的重叠区域，但是三者在运动过程中不会出现相切或者干涉的情况，搅拌时虽然有更多的剪切面，但是剪切力不够大，对电池浆料的搅拌效果有限。
所述第一搅拌桨221运动轨迹的中心与搅拌组件2公转中心形成第一直线，所述第二搅拌桨222运动轨迹的中心与搅拌组件2公转中心形成第二直线，所述第三搅拌桨223运动轨迹的中心与搅拌组件2公转中心形成第三直线，所述第一直线与第二直线所形成的夹角为88°，第二直线与第三直线所形成的夹角为88°。
第一搅拌桨221、第二搅拌桨222、第三搅拌桨223在搅拌时，会有部分区域存在相互剪切的情况，电池浆料一方面会受到搅拌桨自身形成的搅拌力，另一方便会收到各个搅拌桨之间所形成的剪切力，多个力多重作用在电池浆料上，能够将溶液中的细微粉团或固体颗粒团聚体进一步打散和均质，得到足够细小的固体颗粒，并均匀分布于溶液中，达到微观超细分散的作用，客显著提高浆料综合性能，最终得到的电池料浆，具有更好的颗粒度、细度和粘度，大力提升电池料浆的质量。
所述搅拌组件2还包括有分散轴和安装在分散轴表面的分散盘，分散轴位于第一搅拌轴211第二搅拌轴212之间的第一分散轴231、位于第二搅拌轴212第三搅拌轴213之间的第二分散轴232、位于第二搅拌轴212第三搅拌轴213之 间的第三分散轴233，第一分散轴231固定设置有第一分散盘241，第二分散轴232固定设置有第二分散盘242，第三分散轴233固定设置有第三分散盘243。在第一搅拌桨221与第三搅拌桨223之间存在较大的搅拌空白区域，第三分散盘243的直径可以最大化大于第分散盘、第二分散盘242的直径，从而提升第三分散盘243的线速度，实现高速分散。
实施例二
与实施例一不同的是，所述第一直线与第二直线所形成的夹角为90°，第二直线与第三直线所形成的夹角为90°。
实施例三
与以上实施例不同的是，如图8所示，所述第一直线与第二直线所形成的夹角为93°，第二直线与第三直线所形成的夹角为93°，三根搅拌桨的运动轨迹分别为e、f、g。按本实施例结构设置，第一搅拌桨221、第二搅拌桨222、第三搅拌桨223会在两种剪切状态来回切换，第一种状态就是三者两两相切，第二种状态是第一搅拌桨221与第二搅拌桨222、第二搅拌桨222与第三搅拌桨223处于相切状态，第一搅拌桨221与与第三搅拌桨223不干涉，具体如图9-12所示。在此角度下，无论第一搅拌桨221、第二搅拌桨222、第三搅拌桨223处在何位置，第一搅拌桨221与第二搅拌桨222、第二搅拌桨222与第三搅拌桨223始终处于相切状态，电池浆料始终收到搅拌力和剪切力，最大化提升电池浆料的搅拌质量。这种搅拌桨的运动方式，能够不间断地产生由上至下的、顺时针/逆时针方向的、公转方向的、自转方向的多方向剪切力，能够形成最大的运动剪切空间，搅拌效果最佳，搅拌得到的电池料浆质量最佳。
实施例四
与以上实施例不同的是，所述第一直线与第二直线所形成的夹角为95°，第二直线与第三直线所形成的夹角为95°。
实施例五
与以上实施例不同的是，所述第一直线与第二直线所形成的夹角为98°，第二直线与第三直线所形成的夹角为98°。
实施例六
与以上实施例不同的是，所述第一直线与第二直线所形成的夹角为88°，第二直线与第三直线所形成的夹角为98°。
参照例
与以上实施例不同的是，所述第一直线与第二直线所形成的夹角为120°，第二直线与第三直线所形成的夹角为120°。
此处需重点说明的是，本申请文件所指第一搅拌桨221、第二搅拌桨222、第三搅拌桨223在搅拌时的剪切，并不是指各个搅拌桨完全贴合在一起，而是指各个搅拌桨之间存在少量间隙(如0.1mm-10cm左右的间隙距离)，该间隙可以供电池浆料穿过，电池浆料会受到上至下的、顺时针/逆时针方向的、公转方向的、自转方向的多方向剪切力，在该间隙部位的电池浆料，是完全受到了剪切力的。
由于电池浆料分为正极电池浆料、负极电池浆料、混合浆料等，不同厂家采用的电池浆料的配方会有所不同。本申请人实验了众多客户厂家的电池浆料，得到的搅拌效果均相似，即本申请文件记载的搅拌桨的结构设置方式，适用于各种配方的电池浆料；如论搅拌何种配方制作的电池浆料，相对比传统的单一搅拌桨、双搅拌桨结构的搅拌机、以及本申请人原来研发的三桨搅拌机而言，本申请文件记载的三桨式搅拌机，得到的电池浆料的质量会更佳。
本申请人经过多次实验，每次均是将等量的同种电池浆料放入实施例一至实施例六、以及参照例中的搅拌机，搅拌1小时，电池浆料受到的剪切范围以及搅拌完成后的性能情况，均为如下：
Figure PCTCN2021141819-appb-000001
电池浆料受到的剪切范围，按面积大小排序为A +++＞A ++＞A +＞A；分散均匀度按质量优质程度排序为A +++＞A ++＞A +＞A；流动性按优质程度排序为A +++＞A ++＞A +＞A；即电池料浆在搅拌过程中，收到的剪切部位面积越大、剪切力越大，得到的电池浆料的质量越高。
上述实施方式仅为本发明的优选实施方式，不能以此来限定本发明保护的范围，本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换均属于本发明所要求保护的范围。

Claims (7)

  1. 一种电池料浆搅拌用三桨式混合搅拌设备，包括机架、安装在机架上且相互联动连接的传动组件和搅拌组件，传动组件带动搅拌组件实现公转和自转，所述搅拌组件包括带有第一搅拌桨的第一搅拌轴、带有第二搅拌桨的第二搅拌轴、带有第三搅拌桨的第三搅拌轴，第一搅拌桨、第二搅拌桨、第三搅拌桨均为螺旋状结构且其顶部至底部的螺旋角度为90°，其特征在于：所述第一搅拌桨运动轨迹的中心与搅拌组件公转中心形成第一直线，所述第二搅拌桨运动轨迹的中心与搅拌组件公转中心形成第二直线，所述第三搅拌桨运动轨迹的中心与搅拌组件公转中心形成第三直线，所述第一直线与第二直线所形成的夹角为88°-98°，第二直线与第三直线所形成的夹角为88°-98°。
  2. 根据权利要求1所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述第一直线与第二直线所形成的夹角和第二直线与第三直线所形成的夹角，二者角度相同。
  3. 根据权利要求1或2所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述第一直线与第二直线所形成的夹角为90°-95°，第二直线与第三直线所形成的夹角为90°-95°。
  4. 根据权利要求1或2所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述传动组件包括安装基座、联动连接的搅拌驱动电机与中心轴，安装基座轴向固定、周向旋转地设置于机架上，中心轴、第一搅拌轴、第二搅拌轴、第三搅拌轴均与安装基座固定连接，中心轴表面固定套接有主动齿轮，主动齿轮啮合有三个从动齿轮，三个从动齿轮分别联动连接第一搅拌轴、第二搅拌轴、第三搅拌轴。
  5. 根据权利要求1或2所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述搅拌组件还包括有分散轴和安装在分散轴表面的分散盘，分散轴位于第一搅拌轴第二搅拌轴之间的第一分散轴、位于第二搅拌轴第三搅拌轴之间的第二分散轴、位于第二搅拌轴第三搅拌轴之间的第三分散轴，第三分散轴表面的分散盘直径均大于第一分散轴的分散盘直径、第二分散轴的分散盘直径。
  6. 根据权利要求1或2所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述第一搅拌桨、第二搅拌桨、第三搅拌桨至少一个的底部设有铲刮件。
  7. 根据权利要求6所述的电池料浆搅拌用三桨式混合搅拌设备，其特征在于：所述铲刮件至少设有两个，分别位于同一个搅拌桨的底部的两侧。
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