Anti-agglomeration dispersing stirring device for high-nickel ternary slurry

Abstract

The utility model relates to a stirring device, and provides a high-nickel ternary slurry anti-agglomeration dispersing stirring device which comprises a rack, a tank body, a cover plate, a feeding hole, a discharging pipe, a valve body and the like, a control panel is arranged on one side of the front portion of the rack, a tank body is hinged to the upper portion of the rack, a cover plate is installed on the top of the tank body and provided with a feeding port, the lower portion of the tank body is connected and communicated with a discharging pipe, and a valve body is arranged on a pipeline of the discharging pipe. According to the stirring device, materials in different areas in the tank body are stirred and mixed through the two stirring paddles which are arranged on the stirring piece and rotate synchronously in the opposite directions, meanwhile, the materials generate composite flow in the radial direction and the axial direction by combining periodic swinging of the tank body, the shearing effect and turbulent disturbance are enhanced, high-nickel ternary slurry is effectively prevented from being agglomerated in the stirring process, and the stirring efficiency is improved. The dispersion uniformity and the mixing efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of stirring devices, especially a kind of high-nickel ternary slurry anti-agglomeration dispersion stirring device. BACKGROUND

[0002] With the rapid development of new energy industry, lithium ion battery has been widely used in electric vehicles, energy storage equipment and other fields due to its high energy density, excellent cycle performance and other characteristics. High-nickel ternary material (such as NCM811, NCM90100, etc.) has become the core positive electrode material for improving the energy density of lithium ion battery due to its higher specific capacity, and the preparation quality of high-nickel ternary slurry directly determines the electrochemical performance and safety performance of the battery. In the slurry preparation process, high-nickel ternary positive electrode powder, binder, conductive agent and solvent components need to be fully mixed and dispersed to ensure uniform distribution of each component and avoid problems such as poor slurry uniformity and electrode sheet coating defects caused by powder agglomeration. Therefore, stirring and dispersion are the key processes for preparing high-nickel ternary slurry.

[0003] In the prior art, the stirring process of high-nickel ternary slurry usually includes: first, the solvent and the binder are put into the stirring tank to form a uniform glue solution through pre-dispersion; then, high-nickel ternary powder and conductive agent are added in batches, the stirring shaft drives the stirring paddle to rotate, and the shear force and impact force are used to make the powder particles separate from the agglomerates and merge into the glue solution; finally, after a period of heat preservation stirring, the preparation of the slurry is completed. The core advantage of the existing stirring device is simple structure and convenient operation, which can meet the basic needs of large-scale production, and the equipment manufacturing cost and maintenance cost are relatively low, suitable for different production scales and widely used in the lithium ion battery industry.

[0004] However, the existing stirring device has significant structural and process defects in practical application, which is difficult to adapt to the characteristics of high-nickel ternary materials: from the structure, the stirring paddle is mostly a single form of blade, and is fixed at a specific position of the stirring shaft, resulting in obvious stirring dead angles in the stirring tank, especially the materials in the tank wall and tank bottom area are difficult to be effectively stirred, and long-term static or weak shear state makes it difficult to fully disperse the agglomerated particles; at the same time, the shear force of the stirring paddle is concentrated in the local area, and the overall shear strength distribution is uneven, and for high-nickel ternary powder which has high surface energy and is easy to agglomerate, it is difficult to form a continuous and uniform dispersion force. From the process, the mixing of powder and glue in the existing stirring process mainly relies on the passive dispersion of mechanical stirring, and lacks auxiliary structures for active dispersion. When the powder is added in batches, "clumping" phenomenon may occur on the surface of the glue, and these clumps are difficult to be quickly broken by the stirring paddle, thereby causing a large number of undispersed agglomerates in the slurry. The above defects directly cause poor slurry uniformity and uneven particle dispersion, which not only reduces the charge-discharge capacity and cycle stability of the lithium ion battery, but also may cause uneven thickness of the pole piece due to particle agglomeration in the pole piece coating process, increasing the risk of internal short circuit of the battery, and seriously affecting the product quality and safety of the battery. Practical new type content

[0005] In order to overcome the defects in the prior art, the purpose of the present application is to provide a high-nickel ternary slurry anti-agglomeration dispersion stirring device.

[0006] The technical scheme of the present application is: a high-nickel ternary slurry anti-agglomeration dispersion stirring device, comprising a rack, a tank, a cover plate, a feed inlet, a discharge pipe, a valve body, a guide seat, a connecting arm, a connecting block, a connecting plate and a transmission part, the front side of the rack is provided with a control panel, the upper part of the rack is hingedly connected with the tank, the top of the tank is provided with the cover plate, the cover plate is provided with the feed inlet, the lower part of the tank is connected and communicated with the discharge pipe, the pipeline of the discharge pipe is provided with the valve body, the cover plate is provided with the stirring part, the material in the tank is stirred by the stirring part, the lower part of the rack is transversely provided with the guide seat, the connecting arm is slidably arranged in the guide seat, the upper end of the connecting arm is hingedly connected with the connecting block, the lower part of the tank is vertically provided with the connecting plate near the guide seat, the connecting block is slidably connected with the connecting plate, the guide seat is provided with the transmission part, the transmission part is composed of a lead screw and a transmission motor connected with the lead screw, the transmission lead screw is rotatably connected with the lower part of the connecting arm, the lead screw is driven to rotate by the transmission motor, thereby driving the connecting arm to slide left and right along the guide seat, and the connecting block drives the lower part of the tank to swing left and right.

[0007] Optionally, the stirring piece comprises a shell, a driving motor, a bevel gear, a stirring shaft one, a stirring paddle one, a stirring shaft two and a stirring paddle two, the shell is fixed on the top of the cover plate, the driving motor is arranged on one side of the shell, the output shaft of the driving motor extends into the shell, the stirring shaft one is vertically and rotatably arranged at the center of the top of the shell, the lower part of the stirring shaft one extends through the cover plate from the shell, the lower part of the stirring shaft extends into the lower part of the tank, the stirring shaft two is rotatably arranged at the lower part of the shell, the stirring shaft two is sleeved outside the stirring shaft one, the lower part of the stirring shaft two extends into the upper part of the tank from the cover plate, the lower part of the stirring shaft one and the lower part of the stirring shaft two are respectively provided with the stirring paddle one and the stirring paddle two, the output shaft of the driving motor and the upper parts of the stirring shaft one and the stirring shaft two are provided with the bevel gears, the bevel gears on the stirring shaft one and the stirring shaft two are arranged in an upper and lower opposite mode, the bevel gears on the output shaft of the driving motor are respectively engaged with the bevel gears on the stirring shaft one and the stirring shaft two, through the operation of the driving motor, the bevel gears on the output shaft of the driving motor synchronously drive the bevel gears on the stirring shaft one and the stirring shaft two to rotate, and then the stirring shaft one and the stirring shaft two are synchronously and reversely rotated.

[0008] Optionally, the stirring paddle two rotates around the outside of the stirring shaft one, and a gap is left between the stirring paddle two and the inner wall of the tank.

[0009] Optionally, the tank body adopts a double-layer structure comprising an inner tank and an outer tank, an annular space is left between the inner tank and the outer tank, two medium connectors are arranged on the outer wall of the tank body, and the two medium connectors are respectively communicated with the annular space and used for guiding the heating or cooling medium to be introduced or discharged.

[0010] Optionally, the tank body is coated with a heat preservation layer.

[0011] Optionally, the cover plate is provided with two end heads, one of which is used for connecting the cleaning liquid, and the other of which is used for connecting the compressed gas.

[0012] Beneficial effects: 1. The stirring paddle two on the stirring piece is reversely and synchronously rotated, the materials in different areas of the tank are stirred and mixed, the materials are subjected to compound flow in the radial direction and the axial direction through the periodic swinging of the tank, the shearing action and turbulent disturbance are enhanced, the agglomeration of the high-nickel ternary slurry in the stirring process is effectively prevented, and the dispersion uniformity and mixing efficiency are improved.

[0013] 2. The tank body is provided with a cavity inside and a double-layer structure, and the heating or cooling medium is guided to flow in the cavity through the medium connector, so that the temperature of the slurry in the inner tank is adjusted and controlled, the temperature requirements of the high-nickel ternary slurry in different stirring stages are adapted, and the performance of the slurry is prevented from being damaged or the agglomeration being intensified due to the improper temperature.

[0014] 3. The utility model discloses a through setting two end heads respectively introduce cleaning liquid and clean gas source to the jar body, through the cleaning liquid access one end head and pass into the jar body, can wash the jar body inside and the stirring part, reduce the pollution of residual slurry to the subsequent batch, when discharging, then access another end head and pass into the jar body to the clean gas source, through the auxiliary pressure of gas, cooperate the valve body and the discharge pipe of opening, promote the slurry to discharge smoothly, reduce the residual amount of slurry in the jar body, improve the discharge efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0016] Figure 2 It is the three-dimensional structure schematic diagram of the jar body swing state of the utility model.

[0017] Figure 3 It is the partial sectional view of the jar body of the utility model and the like.

[0018] Figure 4 It is the three-dimensional structure schematic diagram of the stirring part of the utility model.

[0019] The meaning of reference signs in the drawing: 1: rack, 2: jar body, 3: cover plate, 31: feed inlet, 4: shell, 41: driving motor, 42: bevel gear, 43: stirring shaft one, 431: stirring paddle one, 44: stirring shaft two, 441: stirring paddle two, 5: discharge pipe, 51: valve body, 6: guide seat, 61: connecting arm, 62: connecting block, 63: connecting plate, 64: transmission part, 7: medium connector, 8: end head, 200: inner jar. DETAILED DESCRIPTION

[0020] Although the utility model can be described in relation to a particular application or industry, those skilled in the art will recognize a broader applicability of the utility model. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, and the like are used to describe the drawings and are not meant to limit the scope of the utility model as defined by the appended claims. Any numerical designations such as: first or second are merely illustrative and are not intended to limit the scope of the utility model in any way.

[0021] A high-nickel ternary slurry anti-agglomeration dispersion stirring device, comprising a jar body, a cover plate, a shell, a driving motor, a bevel gear, a stirring shaft one, a stirring paddle one, a stirring shaft two, a stirring paddle two, a discharge pipe, a valve body, a guide seat, a connecting arm, a connecting block, a connecting plate, a transmission part, a medium connector and an end head. Figures 1-4As shown, including organic frame 1, tank 2, cover plate 3, feed port 31, discharge pipe 5, valve body 51, guide seat 6, connecting arm 61, connecting block 62, connecting plate 63 and transmission member 64, the front side of the frame 1 is provided with a control panel, which is electrically connected with the power components in the device through a line, and the operator can flexibly adjust the working state of the equipment through the control panel, the upper part of the frame 1 is hingedly connected with the tank 2 through a hinged seat, and the hinge point is located on the upper part of the tank 2, the hinge ear seat on the tank is adapted to the hinge seat on the corresponding position of the upper part of the frame 1, the tank 2 can stably swing around the hinge point, the cover plate 3 is detachably installed on the top of the tank 2 through bolts, a sealing gasket is arranged between the cover plate 3 and the tank opening edge of the tank 2, a feed port 31 is formed in the middle of the cover plate 3, and a sealable sealing cover should be provided at the feed port 31, which is convenient for material adding and can be closed during stirring to maintain the sealing of the tank; a discharge port is integrally formed on one side of the lower part of the tank 2, the discharge pipe 5 is fixedly connected to the discharge port through a flange, the internal space of the two is communicated, the valve body 51 is arranged on the pipeline of the discharge pipe 5 in series, the valve body 51 is a manual or electric control valve, and the control switch thereof extends to one side of the frame 1 for convenient operation, the opening and closing of the valve body 51 can realize the quantitative discharge or cut-off of the slurry, so that the discharge process is controllable, the stirring member is fixedly installed on the cover plate 3, the material in the tank 2 is forcibly stirred and dispersed by the stirring member, the guide seat 6 is horizontally fixed on one side of the lower part of the frame 1 through bolts, a horizontal guide groove is formed in the guide seat 6, the connecting arm 61 is embedded in the guide groove and can slide left and right along the guide groove, the cooperation surface of the guide groove and the connecting arm 61 is treated with smoothness, so as to reduce the sliding friction and ensure smooth movement.The upper end of the connecting arm 61 is hingedly connected with the connecting block 62 through a pin shaft, so that the connecting block 62 can be flexibly rotated around the pin shaft. The lower part of the tank body 2 close to the guide seat 6 is fixedly provided with a connecting plate 63 through welding in a vertical manner. The connecting plate 63 is provided with a vertical sliding slot. The connecting block 62 is provided with a sliding block on one side, which is embedded into the vertical sliding slot and can slide up and down in the sliding slot. When the connecting arm 61 slides left and right, the connecting block 62 converts the horizontal displacement into the swinging power of the lower part of the tank body 2 through the cooperation of the sliding block and the vertical sliding slot. The guide seat 6 is fixedly provided with a transmission member 64. The transmission member 64 is composed of a lead screw and a transmission motor connected with the lead screw. The lead screw is rotatably installed at both ends of the guide slot of the guide seat 6 through bearing seats. The transmission motor is fixedly installed at one end of the guide seat 6 through a motor base. The output shaft of the transmission motor is coaxially and fixedly connected with one end of the lead screw through a shaft coupling. The transmission lead screw is screwingly connected with the threaded hole of the lower part of the connecting arm 61. The transmission motor is started through the control panel. The transmission motor drives the lead screw to rotate in the forward and reverse directions, and then drives the connecting arm 61 to stably slide left and right along the guide slot of the guide seat 6 through the threaded transmission. The connecting arm 61 drives the lower part of the tank body 2 to swing left and right around the upper hinged connecting point through the sliding cooperation of the upper hinged connecting block 62 and the connecting plate 63. The stress direction and flow trajectory of the internal material are changed through the swinging of the tank body. The static state of the material on the tank wall and the tank bottom is broken through the cooperation of the stirring member.

[0022] wherein, for example, Figures 1-4As shown, the stirring piece includes a shell 4, a driving motor 41, a bevel gear 42, a stirring shaft one 43, a stirring paddle one 431, a stirring shaft two 44 and a stirring paddle two 441, the top of the cover plate 3 is fixed with the shell 4 by bolts, the shell 4 is a sealed structure for protecting the internal transmission components from contamination; the driving motor 41 is fixed on the upper part of one side of the shell 4 through a motor support, the output shaft of the driving motor 41 extends into the shell 4 through the bearing hole of the side wall of the shell 4, the stirring shaft one 43 is vertically and rotatably installed at the center of the top of the shell 4 through a bearing, the lower part of the stirring shaft one 43 extends downward from the shell 4 through the shaft hole corresponding provided at the center of the cover plate 3 and into the lower part of the tank body 2, the stirring shaft two 44 is rotatably installed at the lower part of the shell 4 through an annular bearing, the stirring shaft two 44 is coaxially sleeved outside the stirring shaft one 43, the lower part of the stirring shaft two 44 extends downward through the annular hole corresponding provided in the cover plate 3 and into the upper part of the tank body 2, the annular hole is also provided with a sealing structure, and the stirring shaft two 44 is rotatably connected with the cover plate, the lower parts of the stirring shaft one 43 and the stirring shaft two 44 are respectively fixed with the stirring paddle one 431 and the stirring paddle two 441 through key connections, the output shaft of the driving motor 41 and the upper parts of the stirring shaft one 43 and the stirring shaft two 44 are all fixed with the bevel gear 42 through key connections, the bevel gears 42 on the stirring shaft one 43 and the stirring shaft two 44 are oppositely arranged, and the bevel gears 42 of the three are all located on the same transmission plane inside the shell 4, the bevel gears 42 on the output shaft of the driving motor 41 are respectively engaged with the bevel gears 42 on the stirring shaft one 43 and the stirring shaft two 44, the driving motor 41 is started through the control panel, when the driving motor 41 operates, the bevel gears 42 on the output shaft of the driving motor 41 synchronously drive the bevel gears 42 on the stirring shaft one 43 and the stirring shaft two 44 to rotate reversely, thereby driving the stirring shaft one 43 and the stirring shaft two 44 to rotate synchronously and reversely, so that the stirring paddle one 431 and the stirring paddle two 441 form reverse shearing motion, greatly improving the shearing and dispersing capacity of the materials, and effectively breaking up the agglomerated particles.

[0023] As shown in Figure 3 and Figure 4 , the stirring paddle two 441 rotates around the outside of the stirring shaft one 43 in an annular distribution, the edge of the paddle blade of the stirring paddle one 431 is designed in an arc shape, and the edge is provided in a sawtooth shape, there is a reasonable gap between the stirring paddle two 441 and the inner wall of the tank body 2, which can not only avoid damage caused by friction between the paddle blade and the tank wall, but also form a strong shearing flow field, when the stirring paddle two 441 rotates at high speed, the materials at the gap are subjected to strong shearing force, at the same time, the counter-rotating stirring paddle one 431 and the stirring paddle two 441 form a convection disturbance, further enhancing the shearing effect and the material disturbance effect, preventing the particles from re-agglomerating.

[0024] As shown in Figure 3As shown, the tank body 2 adopts a double-layer structure, including an inner tank 200 for containing the slurry to be stirred, and an outer tank with an annular space between the inner tank 200 and the outer tank to form a jacket layer, two medium connectors 7 are respectively welded and fixed to the upper and lower parts of the outer wall of the tank body 2, and the two medium connectors 7 are respectively communicated with the upper and lower parts of the annular space, the medium connector 7 at the upper part is used for introducing heating or cooling medium, and the medium connector 7 at the lower part is used for discharging the heating or cooling medium, by introducing steam, hot water or cooling water and the like into the jacket layer, and by adjusting the temperature of the medium through an external temperature adjusting component, the temperature of the slurry in the tank body 2 can be adjusted, the optimal temperature environment of the slurry during stirring is maintained, and the change of the viscosity of the slurry caused by excessively high or low temperature is avoided to affect the dispersion effect, and meanwhile, the outer surface of the tank body 2 is covered with a heat preservation layer made of heat insulation material and fixed to the outer side of the tank body 2 through a bandage, which can reduce the temperature loss of the medium in the jacket layer, improve the temperature adjustment efficiency, and ensure the stability of the temperature of the slurry.

[0025] As shown in the drawings, Figures 1-3 The device further includes end heads 8, two end heads 8 are symmetrically arranged on the cover plate 3, both of the two end heads 8 are communicated with the channel in the cover plate 3, and the lower end of the channel extends into the inside of the tank body 2, one of the two end heads 8 is used for connecting a cleaning liquid, the cleaning liquid can be conveyed into the tank body 2 through the end head 8 and the internal channel, and cooperates with the stirring piece to clean the inside of the tank body 2 after stirring is completed, so that the residual slurry does not affect the next use, and the other end head 8 is used for connecting a clean compressed gas, during the discharging process, the clean compressed gas is introduced into the tank body 2 to apply auxiliary pressure, so that the slurry is quickly and completely discharged from the discharge pipe 5 under the action of pressure, the residual slurry in the tank bottom or the discharge pipe is reduced to block, and the discharging efficiency and the cleanliness of the tank body are improved.

[0026] The above only describes the embodiments of the present application and is not used to limit the present application. Any equivalent replacement made within the principles of the present application shall be included in the protection scope of the present application. The contents not described in detail in the present application are the existing technology known by the technical personnel in the field.

Claims

1. A high-nickel ternary slurry anti-agglomeration and dispersion stirring device, comprising a frame (1) and a tank (2), wherein a control panel is provided on one side of the front of the frame (1), and the tank (2) is hinged to the upper part of the frame (1). Its features are: It also includes a cover plate (3), a feed inlet (31), a discharge pipe (5), a valve body (51), a guide seat (6), a connecting arm (61), a connecting block (62), a connecting plate (63), and a transmission component (64). The top of the tank (2) is equipped with a cover plate (3), which has a feed inlet (31). The lower part of the tank is connected to and connected to a discharge pipe (5). A valve body (51) is installed on the discharge pipe (5). An agitator is installed on the cover plate (3) to agitate the material in the tank (2). A guide seat (6) is provided laterally on one side of the lower part of the frame (1). The guide seat (6) slides left and right inside the frame. The movable type is provided with a connecting arm (61), and a connecting block (62) is hinged to the upper end of the connecting arm (61). A connecting plate (63) is vertically provided on the lower part of the tank body (2) near the guide seat (6). The connecting block (62) is slidably connected to the connecting plate (63). A transmission component (64) is provided on the guide seat (6). The transmission component (64) consists of a lead screw and a transmission motor connected to the lead screw. The transmission lead screw is screwed to the lower part of the connecting arm (61). The transmission motor drives the lead screw to rotate, thereby driving the connecting arm (61) to slide left and right along the guide seat (6). The lower part of the tank body (2) swings left and right through the connecting block (62).

2. The anti-agglomeration and dispersion stirring device for high-nickel ternary slurry according to claim 1, characterized in that: The stirring components include a housing (4), a drive motor (41), a bevel gear (42), a stirring shaft (43), a stirring paddle (431), a stirring shaft (44), and a stirring paddle (441). The housing (4) is fixedly mounted on the top of the cover plate (3). The drive motor (41) is mounted on one side of the housing (4). The output shaft of the drive motor (41) extends into the housing (4). The stirring shaft (43) is vertically and rotatably mounted at the center of the top of the housing (4). The lower part of the stirring shaft (43) passes through the cover plate (3) from inside the housing (4). The lower part of the stirring shaft extends into the lower part of the tank (2). The stirring shaft (44) is rotatably mounted on the lower part of the housing (4). The stirring shaft (44) is sleeved on the outside of the stirring shaft (43). The lower part of the stirring shaft (44) extends downward from inside the cover plate (3) into the upper part of the tank (2). The lower part of the first stirring shaft (43) and the lower part of the second stirring shaft (44) are respectively provided with a stirring paddle (431) and a stirring paddle (441). The output shaft of the drive motor (41) and the upper part of the first stirring shaft (43) and the second stirring shaft (44) are provided with bevel gears (42). The bevel gears (42) on the first stirring shaft (43) and the second stirring shaft (44) are arranged in opposite directions. The bevel gears (42) on the output shaft of the drive motor (41) mesh with the bevel gears (42) on the first stirring shaft (43) and the second stirring shaft (44) respectively. When the drive motor (41) is running, the bevel gears (42) on its output shaft synchronously drive the bevel gears (42) on the first stirring shaft (43) and the second stirring shaft (44) to rotate, thereby driving the first stirring shaft (43) and the second stirring shaft (44) to rotate synchronously and in opposite directions.

3. The anti-agglomeration and dispersion stirring device for high-nickel ternary slurry according to claim 2, characterized in that: The second stirring paddle (441) rotates around the outside of the first stirring shaft (43), and there is a gap between the second stirring paddle (441) and the inner wall of the tank (2).

4. The anti-agglomeration and dispersion stirring device for high-nickel ternary slurry according to claim 3, characterized in that: It also includes a medium connector (7). The tank body (2) adopts a double-layer structure, including an inner tank (200) and an outer tank. There is an annular gap between the inner tank (200) and the outer tank. Two medium connectors (7) are provided on the outer wall of the tank body (2). The two medium connectors (7) are respectively connected to the annular gap for introducing or exporting heating or cooling media.

5. The anti-agglomeration and dispersion stirring device for high-nickel ternary slurry according to claim 4, characterized in that: The tank (2) is covered with an insulation layer.

6. The anti-agglomeration and dispersion stirring device for high-nickel ternary slurry according to claim 5, characterized in that: It also includes an end (8), and the cover plate (3) is provided with two end (8), one of which is used to connect to the cleaning fluid and the other end (8) is used to connect to the compressed gas.

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