CN215463957U

CN215463957U - Kneading device and battery paste manufacturing equipment

Info

Publication number: CN215463957U
Application number: CN202120545157.8U
Authority: CN
Inventors: 刘超; 邓忠德; 胡虞根; 吴志亮; 贺梦江; 张耀
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2022-01-11
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses a kneading device and a manufacturing device of battery slurry, wherein the kneading device comprises a kneading pipe sleeve, a first driving piece and at least one kneading piece, the kneading pipe sleeve is limited with a kneading channel, and the side wall of the kneading pipe sleeve is provided with a powder feeding port, a powder discharging port and at least one first solvent feeding port; the kneading piece is arranged in the kneading channel and comprises a head screw section, at least one kneading section and at least one dispersing section, the powder feeding port and the first solvent feeding port are positioned in the head screw section, and the head screw section is used for pushing the powder and the powder wetted by the solvent to move towards the discharging port; the kneading section and the dispersing section are sequentially arranged between the head screw section and the powder discharge port in a staggered manner, the kneading section is used for breaking and kneading the materials, and the dispersing section is used for shearing the kneaded materials; the first driving piece is connected with the kneading piece and used for driving the kneading piece to rotate. The utility model provides a knead device and battery thick liquids's preparation equipment kneads the piece and includes head screw section, kneads section and dispersion section, so, satisfied the continuous transport of battery thick liquids promptly, compromise kneading effect and dispersion effect of battery thick liquids again, promote when being favorable to stirring efficiency and thick liquids solid content.

Description

Kneading device and battery paste manufacturing equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a kneading device and a battery slurry manufacturing device.

Background

Batteries are used as energy supply devices commonly adopted in the field of various electronic products, and the development and the demand of the batteries in the fields of electric vehicles, energy storage and the like are rapidly increased. In the process of manufacturing the battery, battery processing procedures such as slurry stirring and coating are needed, and the existing slurry stirring equipment cannot give consideration to both the processing efficiency and the solid content of the battery slurry.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, the kneading device provided by the application can be used for quickly wetting, kneading and dispersing the battery powder, and the processing efficiency and the solid content of the battery slurry are ensured.

The application also discloses a manufacturing device of the battery slurry with the kneading device.

A kneading device according to an embodiment of the present application includes a kneading pipe sleeve, a first driving member, and at least one kneading element: the kneading pipe sleeve is limited with a kneading channel, and the side wall of the kneading pipe sleeve is provided with a powder feeding port, a powder discharging port and at least one first solvent feeding port; at least one kneading element is arranged in the kneading channel, and the axial direction of the kneading channel is parallel to the axial direction of the kneading element; the kneading piece comprises a head screw section, at least one kneading section and at least one dispersing section along the length direction of the kneading piece, the powder feeding port and at least one first solvent feeding port are positioned in the head screw section, the head screw section is used for pushing powder, a solvent and the powder wetted by the solvent to move towards the discharging port, the kneading section and the dispersing section are sequentially staggered between the head screw section and the discharging port, the kneading section is used for crushing and kneading the material, and the dispersing section is used for shearing the kneaded material; the first driving piece is connected with the kneading piece and used for driving the kneading piece to rotate.

The kneading device according to the embodiment of the present application has at least the following advantageous effects: in the process that the solvent and the battery powder pass through the head screw section, the kneading section and the dispersing section, the head screw section can enable the solvent to quickly wet the battery powder; the kneading section can break and knead the wetted battery powder to ensure the solid content of the subsequent battery slurry; the dispersion section can provide larger shearing force for the kneaded battery slurry which is in a semi-flow state or a full-flow state, so that the battery slurry is better sheared and dispersed, the solid content and the dispersion consistency of the battery slurry are further improved, and the viscosity of the battery slurry is reduced. In addition, the kneading member adopts the above structure, that is, the kneading member comprises the head screw section, the kneading section and the dispersing section, so that the continuous conveying of the battery slurry is satisfied, the kneading effect and the dispersing effect of the battery slurry are taken into consideration, and the stirring efficiency and the solid content of the slurry are promoted.

According to some embodiments of the present application, the initial position of the leading screw section is provided with the first solvent feed port; or the initial positions of the head screw section and the kneading section are both provided with the first solvent feeding port; or the initial positions of the head screw section, the kneading section and the dispersing section are all provided with the first solvent feeding port.

According to some embodiments of the present application, the kneading element further comprises at least one tail screw section connected between the kneading section and the dispersing section for urging the battery slurry toward the discharge opening.

According to some embodiments of the present application, the kneading block has m blocks, the dispersing block has n blocks, or, m n + 1;

the tail screw section is provided with m sections, and the m sections of the tail screw section are respectively positioned on one side of each kneading section, which is close to the discharge port; or the tail screw section is provided with n sections, and the n sections are respectively positioned at one side of each section of the dispersing section, which is close to the discharge port.

According to some embodiments of the present application, the head screw section includes a first driving shaft and helical blades disposed on a peripheral surface of the first driving shaft, the kneading section includes a second driving shaft and kneading blocks disposed on a peripheral surface of the second driving shaft, the dispersing section includes a third driving shaft and a first dispersing disc disposed on a peripheral surface of the third driving shaft, the first driving shaft, the second driving shaft and the third driving shaft are integrally connected and coaxially disposed, and the first driving member is used for driving the first driving shaft, the second driving shaft and the third driving shaft to rotate.

According to some embodiments of the present application, the kneading block comprises one kneading disc; or the kneading block comprises a plurality of kneading disks, the kneading disks are stacked, and an included angle exists between every two adjacent kneading disks; wherein the kneading disc is a triangular kneading disc with curved sides or an elliptical kneading disc.

According to some embodiments of the application, the first dispersion disc is a toothed disc having at least one, the spacing between different toothed discs is 1mm to 200mm, and the angle between the teeth of the toothed disc and the third drive shaft is 0 ° to 90 °.

The manufacturing equipment of the battery slurry according to the embodiment of the application comprises the kneading device, the continuous dispersing device and the circulation transfer device, wherein the kneading device comprises: the kneading device is used for kneading and dispersing the materials to initially form battery slurry; the continuous dispersing device comprises a dispersing tank, a dispersing piece and a second driving piece, wherein the dispersing tank is communicated with a discharge port of the kneading device so that the battery slurry in the kneading device is conveyed to the dispersing tank, the dispersing piece is arranged in the dispersing tank, and the second driving piece is connected with the dispersing piece and is used for driving the dispersing piece to rotate in the dispersing tank so that the dispersing piece can shear and disperse the kneaded battery slurry; the circulating transfer device comprises a transfer tank, a dispersing paddle, a second dispersing disc and a power assembly, the transfer tank is communicated with the dispersing tank, the dispersing paddle and the dispersing disc are respectively and independently arranged in the transfer tank, the power assembly is used for driving the dispersing paddle to rotate around a first rotating central shaft so that the dispersing paddle can stir the battery slurry, and the power assembly is used for driving the second dispersing disc to rotate around a second rotating central shaft so that the second dispersing disc can disperse and shear the battery slurry; the second rotating central shafts are arranged in parallel at one side of the first rotating central shaft, and the transfer tank is provided with a second solvent feeding port.

The manufacturing equipment of the battery slurry has at least the following beneficial effects: the second driving piece drives the dispersing piece to rotate in the dispersing tank, and the rotating dispersing piece breaks the battery slurry into groups and cuts the battery slurry, so that the battery slurry is further prepared. The dispersed battery slurry is conveyed to a transfer tank, the rotating dispersion paddle is used for axially and radially stirring the battery slurry, and the battery slurry spirally rotates; at the same time, the second dispersion disc is just inside the rotational trajectory of the battery paste, so that the rotating second dispersion disc just shears the spirally rotating battery paste. In conclusion, the dispersion paddle and the second dispersion disc work in a matched mode, so that the battery slurry is stirred and sheared at the same time, and the solid content of the battery slurry and the dispersion consistency of the battery slurry are guaranteed.

According to some embodiments of the present application, a gap between a diameter of the dispersion member and an inner wall of the dispersion tank is 0.5mm to 1000 mm; the dispersing piece and/or the second dispersing plate are vane type dispersing plates or turbine type dispersing plates, and the linear speed of the outer edge of the dispersing piece and/or the second dispersing plate is 2-50 m/s.

According to some embodiments of the present application, the dispersion tank and the transit tank each have a feed inlet and a discharge outlet;

the manufacturing equipment of the battery slurry further comprises a circulating conveying device, the circulating conveying device comprises a pump, a first pipeline and a second pipeline, the first pipeline is connected between the discharge port of the dispersing tank and the feed port of the transfer tank, the second pipeline is connected between the discharge port of the transfer tank and the feed port of the dispersing tank, and the pump is used for driving the battery slurry to circulate between the dispersing tank and the transfer tank; alternatively, the first and second electrodes may be,

the dispersion tank and the transfer tank are both provided with a feed inlet and a discharge outlet, and the kneading pipe sleeve is provided with a return port corresponding to the head screw section;

the manufacturing equipment of the battery slurry further comprises a circulating conveying device, wherein the circulating conveying device comprises a pump, a three-way valve, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline, and the three-way valve is provided with a first port, a second port and a third port; the third pipeline is connected between the discharge hole of the dispersion tank and the feed inlet of the transfer tank, the fourth pipeline is connected between the discharge hole of the transfer tank and the first port, the fifth pipeline is connected between the second port and the feed inlet of the dispersion tank, and the sixth pipeline is connected between the third port and the material return port; the second port and the third port may be selectively closed, and the pump may be configured to drive the battery slurry to circulate between the circulation relay device and the continuous dispersion device, or the pump may be configured to drive the battery slurry to circulate between the circulation relay device, the kneading device, and the continuous dispersion device in this order.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic structural diagram of an overall apparatus for manufacturing a battery paste according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a kneading element according to an embodiment of the present application;

FIG. 3 is another schematic structural view of a kneading element according to an embodiment of the present application;

FIG. 4 is another schematic structural view of a kneading element according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a curved triangular kneading plate of an embodiment of the present application;

FIG. 6 is another angular schematic view of the curved triangular kneading disk of FIG. 5;

FIG. 7 is a schematic view showing the structure of an elliptical kneading disc of an embodiment of the present application;

FIG. 8 is another schematic angular configuration of the elliptical kneading disk of FIG. 7;

fig. 9 is a schematic structural view of a dispersion tray according to an embodiment of the present application;

FIG. 10 is a schematic view of an alternate angular configuration of the dispersion disc of FIG. 9;

FIG. 11 is a schematic structural view of a dispersion member according to an embodiment of the present application;

fig. 12 is a schematic structural view of another dispersing member according to an embodiment of the present application;

FIG. 13 is a schematic structural view of yet another dispersion member in accordance with embodiments of the present application;

fig. 14 is a schematic structural view of a circulation relay apparatus according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of another battery paste manufacturing apparatus according to an embodiment of the present application.

Reference numerals:

the kneading pipe sleeve 100, the kneading channel 110, the powder material inlet 120, the material outlet 130, the first solvent inlet 140, the powder material bin 150 and the material returning port 160;

kneading element 200, leading screw section 210, first drive shaft 211, helical blades 212, kneading section 220, second drive shaft 221, kneading block 222, dispersing section 230, third drive shaft 231, first dispersing disk 232, trailing screw section 240;

a first driving member 300;

a continuous dispersion apparatus 400, a dispersion tank 410, a dispersion member 420, a second driving member 430;

the circulation transfer device 500, the transfer tank 510, the second solvent feed opening 511, the dispersion paddle 520, the first rotation center shaft 521, the dispersion disc 530, and the second rotation center shaft 531; a power assembly 540;

the circulation delivery device 600, the first pipe 610, the second pipe 620, the third pipe 630, the fourth pipe 640, the fifth pipe 650, the sixth pipe 660, the three-way valve 670, the first port 671, the second port 672, the third port 673, and the pump 680.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The existing slurry stirring production line mainly comprises a double-planet stirring production line, an online continuous mixing and dispersing production line or a double-helix dispersing production line and the like, wherein a double-planet stirring device is adopted to directly mix all the components of the slurry, probability type dispersion of the slurry is carried out for a long time through a second dispersing part and a twist paddle in the double-planet stirring device, once the dispersion time is reduced, the quality of the slurry can not meet the performance requirement of manufacturing a battery, therefore, in order to produce the slurry meeting the battery manufacturing performance requirement, a large amount of time is required to be consumed for stirring and dispersing the slurry, and the processing efficiency of the slurry is low.

The online continuous mixing, dispersing and stirring production line and the double-helix dispersing production line break up powder in the components of the slurry, use the solvent to moisten the powder, and mix the solvent and the powder and place the mixture into the continuous mixing, dispersing and stirring device or the double-helix dispersing device to disperse, thereby realizing the effect of quickly dispersing the slurry, but the viscosity of the slurry generated by processing is high and the temperature rise cannot be controlled, in order to reduce the viscosity and the temperature of the slurry, more solvent needs to be added, so that the solid content of the slurry is low, and further the production cost of the battery is high.

According to the present application, a kneading device is disclosed, referring to fig. 1 and 2, comprising a kneading pipe sleeve 100, a kneading element 200 and a first driving element 300, wherein the kneading pipe sleeve 100 defines a kneading channel 110, and the side wall of the kneading pipe sleeve 100 is provided with a powder feeding port 120, a discharging port 130 and at least one first solvent feeding port 140; the kneading element 200 is arranged in the kneading channel 110, the axial direction of the kneading channel 110 is parallel to the axial direction of the kneading element 200, the kneading element 200 comprises a head screw section 210, at least one kneading section 220 and at least one dispersing section 230 along the axial direction, the powder feeding port 120 and the first solvent feeding port 140 are both arranged on the head screw section 210, the head screw section 210 is used for pushing the material to move towards the discharging port, and the material at this time comprises powder and powder wetted by the solvent; the kneading section 220 and the dispersing section 230 are sequentially arranged between the head screw section 210 and the discharge port 130 in a staggered manner, the kneading section 220 is used for breaking and kneading the materials, and the dispersing section 230 is used for shearing the kneaded materials; the first driving member 300 is connected to the kneading member 200 for driving the kneading member 200 to rotate.

In the process of manufacturing the battery slurry, the kneading device in the scheme of the application kneads materials, and the kneading device can provide large shearing force, viscous force, friction force and the like, so that the battery powder can be quickly wetted and broken under the action of the kneading device, and the solid content in the subsequent battery slurry is ensured.

Specifically, the battery powder is conveyed from the powder feed inlet 120 to the inner kneading channel 110 and is located at the position of the head screw section 210, the kneading element 200 continuously rotates in the kneading channel 110 under the action of the first driving element 300, and in the rotation process of the kneading element 200, the battery powder moves towards the discharge outlet 130 under the action of the head screw section 210; meanwhile, in the process that the battery powder flows to the discharge port 130, the solvent flows into the kneading channel 110 from the first solvent feed port 140, and the solvent is mixed with the battery powder, so that the wetting of the battery powder is realized; further, in the process that the solvent and the battery powder pass through the head screw section 210, the kneading section 220 and the dispersing section 230, the head screw section 210, the kneading section 220 and the dispersing section 230 enable the solvent to rapidly wet the battery powder, and rapidly break and shear the wetted powder, thereby preparing the primary battery slurry.

In addition, the kneading section 220 can break and knead the wetted battery powder to ensure the solid content of the subsequent battery slurry; the dispersing section 230 can provide a large shearing force for the kneaded, semi-flowing or full-flowing battery slurry, so that the battery slurry is stirred and sheared well, the dispersion consistency of the battery slurry is improved, the solid content of the battery slurry is improved, and the viscosity of the battery slurry is reduced.

In addition, the kneading element 200 adopts the above structure, that is, the kneading element 200 comprises the head screw section 210, the kneading section 220 and the dispersing section 230, so that the continuous conveying of the battery slurry is satisfied, the kneading effect and the dispersing effect of the battery slurry are considered, and the stirring efficiency and the solid content of the battery slurry are further improved.

It should be noted that, a plurality of, that is, two or more than two kneading elements 200 may be adopted, and a plurality of kneading elements 200 are arranged in the kneading channel 110 in parallel, for example, in the description of fig. 2, two kneading elements 200 are adopted, and the two kneading elements 200 cooperate to work, so as to improve the wetting and breaking efficiency of the battery powder, the kneading and dispersing efficiency of the battery slurry, and ensure the uniformity of the dispersion of the battery slurry and the solid content of the battery slurry.

In addition, referring to fig. 2, a plurality of kneading sections 220 can be used, a plurality of dispersing sections 230 can be used, one kneading section 220 and one dispersing section 230 are sequentially arranged in a staggered manner along the axial direction of the kneading member 200, so that the battery powder is repeatedly kneaded and dispersed at intervals from the powder inlet 120 to the outlet 130, the kneading section 220 and the dispersing section 230 are matched to work, and the solid content of the battery slurry and the uniformity of the dispersion of the battery slurry are further ensured.

In some embodiments, referring to fig. 3, the kneading member 200 further comprises an end screw section 240, the end screw section 210 is identical to the end screw section 240, and the end screw section 240 is connected between the kneading section 220 and the dispersing section 230 for pushing the material to move toward the discharge port, so that the kneaded battery slurry or the dispersed battery slurry can be rapidly transported to the next process, thereby improving the working efficiency of the kneading apparatus.

Specifically, the kneading section 220 has m sections, the dispersing section 230 has n sections, m is n, or m is n +1, wherein the tail screw section 240 also has n sections, and the n sections of tail screw sections 240 are respectively located at one side of each dispersing section 230 near the discharge port 130, so that the battery slurry after the dispersion is conveyed to the kneading section 220 under the action of the tail screw section 240, and the kneading section 220 continuously breaks the cluster and kneads the battery slurry, or the battery slurry is conveyed to the discharge port 130 under the action of the tail screw section 240, so that the battery slurry is discharged from the kneading channel 110.

Alternatively, referring to fig. 4, the kneading section 220 has m sections, and the dispersing section 230 has n sections, where m is n, or m is n +1, where the tail screw section 240 also has m sections, and the m sections of the tail screw sections 240 are respectively located at one side of each kneading section 220 near the discharge port 130, so that the cell slurry after the kneading is conveyed to the dispersing section 230 for the dispersion of the cell slurry under the action of the tail screw sections 240.

In some embodiments, referring to fig. 1 and 2, the leading screw section 210 includes a first driving shaft 211 and spiral blades 212, the first driving shaft 211 being disposed within the kneading passage 110 in the axial direction of the kneading shroud 100, the spiral blades 212 being fixedly coupled to the circumferential surface of the first driving shaft 211 in the axial direction of the first driving shaft 211. The first driving member 300 is a motor, and a driving shaft of the motor is connected with the first driving shaft 211 so as to drive the first driving shaft 211 to rotate, the first driving shaft 211 drives the helical blade 212 to synchronously rotate, and the helical blade 212 drives the battery powder to move along the axial direction of the first driving shaft 211 so as to convey the battery powder to the kneading section 220; the kneading section 220 comprises a second driving shaft 221 and a kneading block 222, the second driving shaft 221 is integrally connected to one end of the first driving shaft 211, the first driving shaft 211 and the second driving shaft 221 are coaxially arranged, and the kneading block 222 is fixedly connected to the peripheral surface of the first driving shaft 211, so that the first driving shaft 211 and the second driving shaft 221 synchronously rotate, the second driving shaft 221 drives the kneading block 222 to rotate, the kneading block 222 enables battery powder to be quickly wetted, and the wetted battery powder is quickly broken into lumps and kneaded to obtain semi-flow or full-flow battery slurry, and the solid content of the battery slurry is ensured; similarly, the dispersing section 230 includes a third driving shaft 231 and a first dispersing disc 232, the third driving shaft 231 is integrally connected to one end of the second driving shaft 221, which is far away from the first driving shaft 211, the second driving shaft 221 and the third driving shaft 231 are coaxially arranged, and the first dispersing disc 232 is fixedly connected to the peripheral surface of the third driving shaft 231, so that the second driving shaft 221 drives the third driving shaft 231 to rotate, the third driving shaft 231 drives the first dispersing disc 232 to rotate, and the first dispersing disc 232 disperses the kneaded, semi-flowing or full-flowing battery slurry.

In some embodiments, the kneading blocks 222 comprise at least one kneading disk, which is a triangular kneading disk with curved sides (see fig. 5 and 6) or an elliptical kneading disk (see fig. 7 and 8), and different kneading disks are stacked with an included angle between two adjacent kneading disks. When the kneading blocks 222 work specifically, the second driving shafts 221 drive the kneading blocks 222 to rotate synchronously, the kneading pieces 200 are provided with two kneading pieces, and the kneading blocks 222 on the two second driving shafts 221 are meshed with each other, so that the battery slurry is broken and kneaded; and, axial drag forces are generated between the intermeshing kneading blocks 222, causing the battery paste to be axially stretched. It should be noted that the engaged kneading blocks 222 have a rolling-like effect on the battery paste, and can rapidly break the battery paste, thereby providing a better kneading effect.

Furthermore, the angle between the kneading discs is 10-75 degrees, and the thickness of the kneading discs is 100-1000 mm, so that the manufacturing cost of the equipment is ensured, and the working efficiency and the working effect of the equipment are also ensured.

In some embodiments, referring to fig. 9 and 10, the first dispersion plate 232 is a toothed plate having at least one, a spacing between different toothed plates is 1mm to 200mm, and an angle between teeth of the toothed plate and the third driving shaft 231 is 0 ° to 90 °, so that the toothed plate can preferably disperse the battery slurry; and according to the dispersion effect, cost, productivity and the like of the battery slurry, the height of the teeth is between 100 and 500mm, and the diameter of the tooth-shaped disc is between 500mm and 2000mm, so that the manufacturing cost of the equipment is ensured, and the working efficiency and the working effect of the equipment are also ensured.

In some embodiments, the first solvent feed port 140 has one, and the first solvent feed port 140 is provided on one side of the head screw section 210, such that the head screw section 210 transports the solvent from the first solvent feed port 140 into the kneading channel 110 during the transport of the battery powder and is located inside the head screw section 210, such that the head screw section 210 causes the solvent to wet the battery powder, thereby obtaining a preliminary battery slurry; and, kneading section 220 and dispersing section 230 further wet the solvent to the battery powder; in addition, the kneading block 222 can break up and knead the wetted battery powder after the battery powder is wetted, and the dispersing section 230 disperses the kneaded, semi-flowing or full-flowing battery slurry.

In order to achieve the gradual wetting of the powder and the reduction of the agglomeration size of the powder, in some embodiments, the first solvent feeding port 140 has a plurality of ports, and the solvent is gradually added into the battery powder from the plurality of first solvent feeding ports 140 during the process of the battery powder from the powder feeding port 120 to the discharging port 130, instead of adding a large amount of solvent from one first solvent feeding port 140, so that the agglomeration size of the battery is reduced, and the agglomeration and kneading effects of the kneading blocks 222 and the dispersing effect of the first dispersion plate 232 are improved.

Regarding the arrangement of the plurality of first solvent feed inlets 140, the first solvent feed inlets 140 may be disposed at a certain interval according to the dispersion effect of the battery slurry, and the interval between two first solvent feed inlets 140 may be between 500mm and 2000, so that the solvent is uniformly and gradually added to the battery powder, thereby preventing the large-sized agglomeration during the transportation of the battery powder.

In a specific embodiment, the first solvent feed port 140 has at least two or more, wherein at least one first solvent feed port 140 is located at the start of the leading screw section 210 to facilitate the transportation of the powder, and at least one first solvent feed port 140 is located at the start of the kneading section 220 to reduce the resistance to the rotation of the kneading blocks 222 and to reduce the wear of the kneading blocks 222. In another specific embodiment, the first solvent feed port 140 has at least three or more, wherein at least one first solvent feed port 140 is located at the start of the leading screw section 210 to facilitate the transportation of the powder, at least one first solvent feed port 140 is located at the start of the kneading section 220 to reduce the resistance to the rotation of the kneading block 222 and the wear of the kneading block 222, and at least one first solvent feed port 140 is located at the start of the dispersing section 230 to reduce the resistance to the rotation of the first dispersion plate 232 and the temperature increase.

Further, the solvent feed amount with respect to each solvent feed port may be a ratio between the first solvent feed port 140 (the first solvent feed port 140 near the frit feed port 120) and the other first solvent feed ports 140 (the first solvent feed ports 140 far from the frit feed port 120), and the ratio is selected to be appropriate in accordance with the dispersion effect of the first dispersion plate 232, and is selected to be approximately between 0.1 and 2, and is mainly selected to be 1, that is, the solvent feed amount of each first solvent feed port 140 is uniform.

In some embodiments, the kneading apparatus further includes a powder bin 150, the powder bin 150 is vertically disposed right above the kneading pipe sleeve 100, and a lower port of the powder bin 150 communicates with the powder feed port 120, so that an operator can feed a large amount of battery powder into the powder bin 150 from the top of the powder bin 150, and the battery powder gradually and continuously flows into the kneading pipe sleeve 100 from the lower port of the powder bin 150, thereby achieving continuous feeding of the kneading pipe sleeve 100.

According to the application, the equipment for manufacturing the battery slurry comprises the kneading device, a continuous dispersion device 400 and a circulating transfer device 500, wherein the kneading device, the continuous dispersion device 400 and the circulating transfer device 500 are sequentially communicated, so that the kneading device quickly wets, breaks and disperses the battery powder to form preliminary battery slurry; the primary battery slurry is conveyed to a continuous dispersion device 400, and the continuous dispersion device 400 further breaks up and shears the battery slurry to ensure the dispersion consistency of the battery slurry; the dispersed battery slurry is conveyed to the circulation transfer device 500, and the circulation transfer device 500 stirs and shears the battery slurry, so that the circulation transfer device 500 enables the battery slurry to enter the dispersion consistency in the transfer tank 510 and ensures the solid content of the slurry.

Specifically, the continuous dispersion apparatus 400 includes a dispersion tank 410, a dispersion member 420, and a second driving member 430, and the dispersion tank 410 is communicated with the discharge port 130 of the kneading apparatus, and thus the kneading apparatus is used to supply the kneaded battery slurry to the dispersion tank 410. Dispersion piece 420 sets up in dispersion tank 410, and second driving piece 430 fixed mounting is in the top of dispersion tank 410, and the drive shaft of second driving piece 430 and the axis of rotation fixed connection of dispersion piece 420, so, second driving piece 430 drive dispersion piece 420 rotates in dispersion tank 410, and pivoted dispersion piece 420 breaks group, cuts battery thick liquids to further preparation battery thick liquids.

It should be noted that the second driving member 430 is a motor.

Further, referring to fig. 11 to 13, the dispersing member 420 is also a dispersing plate, the dispersing plate is a blade type dispersing plate (refer to fig. 11) or a turbine type dispersing plate (refer to fig. 12 and 13), and the linear velocity of the dispersing plate is between 2m/s and 50 m/s; meanwhile, the continuous dispersion device 400 is a small-capacity online dispersion device, the volume of the dispersion tank 410 is between 1 liter and 100 liters, and the gap between the outer edge of the dispersion plate and the inner wall of the dispersion tank 410 is 0.5mm to 1000 mm. Thus, in the process that the dispersing member 420 rotates in the dispersing tank 410, the battery slurry can be sheared and dispersed in the dispersing tank 410 strongly, uniformly and without dead angles, and the dispersing effect is good.

It should be noted that, as shown in fig. 12, the turbine dispersion impeller may include one turbine dispersion impeller, or, as shown in fig. 13, the turbine dispersion impeller includes a plurality of turbine dispersion impellers. When the turbine type dispersion impeller includes a plurality of turbine type dispersion sub-impellers, as shown in fig. 13, the turbine type dispersion impeller is also called a turbine type multi-layer dispersion impeller, the plurality of turbine type dispersion sub-impellers are coaxially disposed, and the diameter of the plurality of turbine type dispersion sub-impellers gradually decreases along the flow direction of the slurry.

The circulation transfer device 500 includes a transfer tank 510, a dispersing paddle 520, a second dispersing plate 530, and a power assembly 540, and the transfer tank 510 is communicated with the dispersing tank 410 such that the dispersing tank 410 transfers the agglomerated and sheared battery slurry to the transfer tank 510. The dispersing paddles 520 and the second dispersing disc 530 are respectively and independently arranged on the inner side of the transfer tank 510 and are vertically arranged, the power assembly 540 is fixedly arranged at the top of the transfer tank 510, the power assembly 540 is connected with a first rotating central shaft 521 of the dispersing paddles 520, so that the power assembly 540 drives the dispersing paddles 520 to rotate around the first rotating central shaft 521, the first rotating central shaft 521 drives the dispersing paddles 520 to rotate, the rotating dispersing paddles 520 are used for stirring the battery slurry, and the first rotating central shaft 521 is overlapped with the central shaft of the transfer tank 510; similarly, the power assembly 540 is further connected to the second rotation center shaft 531 of the second dispersion plate 530, so that the power assembly 540 drives the second dispersion plate 530 to rotate around the second rotation center shaft 531, the second rotation center shaft 531 drives the second dispersion plate 530 to rotate around the second rotation center shaft 531, the rotating second dispersion plate 530 breaks and cuts the battery slurry, and the second rotation center shaft 531 is arranged on one side of the first rotation center shaft 521 in parallel.

In addition, a second solvent feed opening 511 is provided at an upper portion of a sidewall of the relay tank 510, a solvent is fed into the relay tank 510 from the second solvent feed opening 511, and the relay tank 510 feeds the solvent into the dispersion tank 410 so that a sufficient amount of the solvent is contained in the kneaded battery paste to facilitate dispersion of the battery paste by the dispersion member 420.

Specifically, the dispersed battery slurry is conveyed to a transfer tank 510, the rotating dispersing paddles 520 axially and radially stir the battery slurry, and the battery slurry spirally rotates; at the same time, the second dispersion disc 530 is just inside the rotational trajectory of the battery paste, and thus, the rotating second dispersion disc 530 just shears the spirally rotating battery paste. To sum up, the dispersing paddle 520 and the second dispersing plate 530 work in cooperation, so that the battery paste is simultaneously stirred and sheared, and the solid content of the battery paste and the dispersion consistency of the battery paste are ensured.

In addition, the dispersing paddles 520 achieve high-speed rotation of the battery paste, and the battery paste can rapidly pass through the second dispersing plate 530, thereby improving the efficiency of dispersing the battery paste by the second dispersing plate 530.

In some embodiments, depending on the dispersing paddle 520, a helical spin of the battery slurry is formed on the outside or inside of the dispersing paddle 520 during the rotation of the dispersing paddle 520. In one embodiment, referring to fig. 14, the gap between the outer side wall of the dispersing paddle 520 and the inner side wall of the dispersion tank 410 is small, and the battery slurry moves inside the dispersing paddle 520, and at this time, the second dispersion plate 530 is located inside the dispersing paddle 520, so that the battery slurry can be sheared. In another specific embodiment, referring to fig. 1, the outer side wall of the dispersing paddle 520 has a sufficiently large gap with the side wall of the dispersion tank 410, and the battery slurry moves outside the dispersing paddle 520, and at this time, the second dispersing disk 530 is located outside the dispersing paddle 520, so that the battery slurry can be sheared.

Further, the power assembly 540 may employ a motor, a driving shaft of the motor is connected with a gear assembly (not shown), one gear of the gear assembly is connected with the first rotating central shaft 521, and one gear of the gear assembly is connected with the second rotating central shaft 531, so that the motor drives both the first rotating central shaft 521 and the second rotating central shaft 531, and the motor drives the dispersing blades 520 and the second dispersing disk 530 to rotate.

Alternatively, the power assembly 540 may employ a plurality of motors, such as three motors, wherein the drive shaft of one motor is connected to the first rotating center shaft 521, such that the motor drives the dispersing blades 520 to rotate; two other motors are respectively connected to the two second rotation central shafts 531, and the two motors respectively drive the two second rotation central shafts 531 to rotate, thereby driving the corresponding second dispersion discs 530 to rotate.

In some embodiments, the capacity of the transfer tank 510 is designed according to the capacity, and the size of the capacity commonly available on the market is selected: 650L to 2000L. In addition, the second dispersion plate 530 is a blade type dispersion plate or a turbine type dispersion plate, and the linear velocity of the outer edge of the second dispersion plate 530 is 2m/s to 50m/s, so that the battery slurry in the transfer tank 510 is preferably dispersed.

In some embodiments, referring to fig. 1, the apparatus for manufacturing battery paste further includes a circulation conveying device 600, the circulation conveying device 600 includes a pump 680, a first pipe 610 and a second pipe 620, and the dispersion tank 410 and the transit tank 510 each have a feed inlet and a discharge outlet; specifically, the first pipe 610 is connected to the discharge port of the dispersion tank 410 and the feed port of the relay tank 510, and a pump 680 is connected to the first pipe 610, so that the battery slurry in the dispersion tank 410 is transferred to the relay tank 510 through the first pipe 610 under the action of the pump 680, and the dispersion paddle 520 and the second dispersion plate 530 in the relay tank 510 stir and disperse the battery slurry. The second pipe 620 is connected between the discharge port of the transfer tank 510 and the feed port of the dispersion tank 410, and a pump 680 is connected to the second pipe 620, so that the battery slurry in the transfer tank 510 is transferred to the dispersion tank 410 through the second pipe 620 under the action of the pump 680, thereby realizing the circular dispersion of the battery slurry.

The manufacturing equipment of the battery slurry comprises a feeding stage and a circulating stage in the working process. In the feeding stage, the powder and part of the solvent are continuously fed into the kneading device, and are kneaded and dispersed by the kneading device to form a primary battery slurry, and the battery slurry is conveyed to the continuous dispersing device. Meanwhile, the other part of the solvent is continuously added into the circulating transfer device and is added into the continuous dispersion device through the circulating transfer device. The battery slurry after being primarily kneaded by the kneading device and the solvent added by the circulating transfer device are strongly dispersed in the continuous dispersing device, and then the battery slurry after being strongly dispersed enters the circulating transfer device and is further stirred and dispersed in the circulating transfer device; then, the battery slurry is circulated between the circulation relay apparatus 500 and the continuous dispersion apparatus, and the number of circulation is not limited until the end of charging. In a specific embodiment, the number of times the battery slurry is circulated between the continuous dispersion device and the circulation transfer device may be between 5 and 100 times in the charging stage, and further, the flow direction of the solvent charged into the continuous dispersion device through the circulation transfer device coincides with the flow direction of the battery slurry. In the circulation stage, the powder material inlet and the solvent inlet are both closed, and the battery slurry is circulated between the continuous dispersion device and the circulation transfer device 500 for 1-50 times. Therefore, the solid content of the battery slurry is ensured, and the energy consumption of battery slurry processing equipment is reduced; and the battery slurry adopts a circulating treatment mode, so that the overhigh temperature rise caused by long-time stirring of the slurry in a single device can be avoided, the solid content of the slurry can be improved, the processing efficiency of the slurry is improved, and the use amount of NMP (N-methyl pyrrolidone) in the production of the battery slurry and the energy consumption of coating equipment can be reduced due to the increase of the solid content of the slurry, so that the production cost of the battery can be reduced.

In another embodiment, referring to fig. 15, instead of the above-mentioned circulation conveying device 600, in some embodiments, the circulation conveying device 600 further includes a pump 680, a three-way valve 670, a third pipeline 630, a fourth pipeline 640, a fifth pipeline 650, and a sixth pipeline 660, the dispersion tank 410 and the transit tank 510 each have a feed inlet and a discharge outlet, and the kneading pipe sleeve 100 is provided with a return port 160 at a position corresponding to the head screw section 210. Specifically, a third pipe 630 is connected between the feed inlet of the transfer tank 510 and the discharge outlet of the dispersion tank 410, and a pump 680 is connected to the third pipe 630, so that the battery slurry in the dispersion tank 410 is conveyed to the transfer tank 510 through the third pipe 630, and the dispersion paddle 520 and the second dispersion plate 530 in the transfer tank 510 stir and disperse the battery slurry; the three-way valve 670 has a first port 671, a second port 672 and a third port 673, one end of the fourth pipe 640 communicates with the discharge port of the relay tank 510, the other end of the fourth pipe 640 communicates with the first port 671 of the three-way valve 670, the fifth pipe 650 is connected between the second port 672 of the three-way valve 670 and the feed port of the dispersion tank 410, a pump 680 is connected to the fifth pipe 650, the sixth pipe 660 is connected between the return port 160 and the third port 673 of the three-way valve 670, and a pump 680 is connected to the sixth pipe 660. Wherein the second port 672 and the third port 673 can be selectively closed, the pump 680 is used for driving the battery slurry to circulate between the circulation transfer device 500 and the continuous dispersion device, or the pump 680 is used for driving the battery slurry to circulate between the circulation transfer device 500, the kneading device and the continuous dispersion device in sequence.

Specifically, the manufacturing equipment of the battery slurry comprises a feeding stage and a circulating stage in the working process. In the charging stage, the powder and part of the solvent are continuously charged into the kneading device, and the kneading device performs preliminary wetting, breaking, kneading, dispersing and the like on the battery powder, so as to obtain preliminary battery slurry, and the preliminary battery slurry is conveyed to the dispersing tank 410; synchronously, the other part of the solvent is continuously added into the circulating transfer device, the second port 672 of the three-way valve 670 is in an open state, the third port 673 is in a closed state, the solvent in the transfer tank 510 sequentially passes through the fourth pipeline 640 and the fifth pipeline 650 under the action of the corresponding pump 680, so that the solvent in the transfer tank 510 is conveyed to the dispersion tank 410; at this time, the battery slurry kneaded by the kneading device is strongly dispersed in the continuous dispersion device together with the solvent, and then the strongly dispersed battery slurry enters the circulation transfer device and is further stirred and dispersed in the circulation transfer device; then, the battery slurry is circulated between the circulation relay apparatus 500 and the continuous dispersion apparatus, and the number of circulation is not limited until the end of charging. In addition, the flow direction of the solvent added to the continuous dispersion device through the circulation transfer device coincides with the flow direction of the battery slurry. In the circulation stage, the second port 672 of the three-way valve 670 is in a closed state, the third port 673 is in an open state, the powder material inlet and the solvent feed inlet are both closed, and the battery slurry is circulated for 1 to 50 times among the circulation transfer device, the kneading device and the continuous dispersion device in sequence. Thereby ensuring the dispersion consistency of the battery slurry and the solid content of the battery slurry.

It should be noted that, in the process of charging the battery powder, the battery slurry circulates between the dispersion tank 410 and the transfer tank 510 through the third pipeline 630, the fourth pipeline 640 and the fifth pipeline 650, so that the solid content of the battery slurry is ensured, and the energy consumption of the battery slurry processing equipment is reduced; and the battery slurry adopts a circulating treatment mode, so that the overhigh temperature rise caused by long-time stirring of the slurry in a single device can be avoided, the solid content of the slurry can be improved, the processing efficiency of the slurry is improved, and the use amount of NMP (N-methyl pyrrolidone) in the production of the battery slurry and the energy consumption of coating equipment can be reduced due to the increase of the solid content of the slurry, so that the production cost of the battery can be reduced.

After the charging of the battery powder is completed, the battery powder enters a circulation stage, the second port 672 of the three-way valve 670 is closed, the third port 673 of the three-way valve 670 is opened, the battery slurry in the transfer tank 510 is conveyed into the kneading pipe sleeve 100 through the fourth pipeline 640 and the sixth pipeline 660, the kneading member 200 rapidly breaks and disperses the battery slurry, and then the kneaded battery slurry is conveyed into the dispersion tank 410 to disperse the battery slurry, so that the battery slurry circulates among the kneading device, the continuous dispersion device and the circulation transfer device 500.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims

1. A kneading apparatus, characterized by comprising:

the kneading pipe sleeve is limited with a kneading channel, and the side wall of the kneading pipe sleeve is provided with a powder feeding port, a powder discharging port and at least one first solvent feeding port;

at least one kneading element arranged in the kneading channel, wherein the axial direction of the kneading channel is parallel to the axial direction of the kneading element; the kneading piece comprises a head screw section, at least one kneading section and at least one dispersing section along the length direction of the kneading piece, the powder feeding port and the first solvent feeding port are positioned in the head screw section, the head screw section is used for pushing the powder and the powder wetted by the solvent to move towards the discharging port, the kneading section and the dispersing section are sequentially staggered between the head screw section and the discharging port, the kneading section is used for crushing and kneading the material, and the dispersing section is used for shearing the kneaded material; and

the first driving piece is connected with the kneading piece and used for driving the kneading piece to rotate.

2. The kneading apparatus according to claim 1, wherein the starting position of the leading screw section is provided with the first solvent feed port; or the initial positions of the head screw section and the kneading section are both provided with the first solvent feeding port; or the initial positions of the head screw section, the kneading section and the dispersing section are all provided with the first solvent feeding port.

3. The kneading apparatus according to claim 1, wherein the kneading element further comprises at least one tail screw section connected between the kneading section and the dispersing section for moving the cell slurry toward the discharge port.

4. A kneading device according to claim 3, characterized in that the kneading block has m blocks, and the dispersing block has n blocks, where m is n, or m is n + 1;

5. The kneading apparatus according to claim 1, wherein the leading screw section comprises a first drive shaft and helical blades provided on a peripheral surface of the first drive shaft, the kneading section comprises a second drive shaft and kneading blocks provided on a peripheral surface of the second drive shaft, the dispersing section comprises a third drive shaft and a first dispersing disk provided on a peripheral surface of the third drive shaft, the first, second and third drive shafts are integrally connected and coaxially provided, and the first driving member is configured to drive the first, second and third drive shafts to rotate.

6. Kneading apparatus according to claim 5, wherein the kneading block comprises one kneading disk; or the kneading block comprises a plurality of kneading disks, the kneading disks are stacked, and an included angle exists between every two adjacent kneading disks;

wherein the kneading disc is a triangular kneading disc with curved sides or an elliptical kneading disc.

7. A kneading apparatus according to claim 5, wherein the first dispersion disc is a toothed disc having at least one, the interval between different toothed discs is 1mm to 200mm, and the angle between the teeth of the toothed disc and the third drive shaft is 0 ° to 90 °.

8. The preparation equipment of battery thick liquids, its characterized in that includes:

the kneading apparatus according to any one of claims 1 to 7, which is used for kneading and dispersing materials to preliminarily form a battery paste;

the continuous dispersing device comprises a dispersing tank, a dispersing piece and a second driving piece, wherein the dispersing tank is communicated with a discharge port of the kneading device so as to convey the battery slurry in the kneading device to the dispersing tank, the dispersing piece is arranged in the dispersing tank, and the second driving piece is connected with the dispersing piece and is used for driving the dispersing piece to rotate in the dispersing tank so as to enable the dispersing piece to shear and disperse the kneaded battery slurry; and

the circulating transfer device comprises a transfer tank, a dispersing paddle, a second dispersing disc and a power assembly, wherein the transfer tank is communicated with the dispersing tank, the dispersing paddle and the dispersing disc are respectively and independently arranged in the transfer tank, the power assembly is used for driving the dispersing paddle to rotate around a first rotating central shaft so that the dispersing paddle can stir the battery slurry, and the power assembly is also used for driving the second dispersing disc to rotate around a second rotating central shaft so that the second dispersing disc can disperse and shear the battery slurry; the second rotating central shafts are arranged in parallel at one side of the first rotating central shaft, and the transfer tank is provided with a second solvent feeding port.

9. The apparatus for manufacturing battery paste according to claim 8, wherein a gap between an outer edge of the dispersion member and an inner wall of the dispersion tank is 0.5mm to 1000 mm; the dispersing piece and/or the second dispersing plate are vane type dispersing plates or turbine type dispersing plates, and the linear speed of the outer edge of the dispersing piece and/or the second dispersing plate is 2-50 m/s.

10. The apparatus for producing battery paste according to claim 8 or 9,

the dispersion tank and the transfer tank are both provided with a feed inlet and a discharge outlet; the manufacturing equipment of the battery slurry further comprises a circulating conveying device, the circulating conveying device comprises a pump, a first pipeline and a second pipeline, the first pipeline is connected between the discharge port of the dispersing tank and the feed port of the transfer tank, the second pipeline is connected between the discharge port of the transfer tank and the feed port of the dispersing tank, and the pump is used for driving the battery slurry to circulate between the dispersing tank and the transfer tank;

alternatively, the first and second electrodes may be,

the dispersion tank and the transfer tank are both provided with a feed inlet and a discharge outlet, and the kneading pipe sleeve is provided with a return port corresponding to the head screw section; the manufacturing equipment of the battery slurry further comprises a circulating conveying device, wherein the circulating conveying device comprises a pump, a three-way valve, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline, and the three-way valve is provided with a first port, a second port and a third port; the third pipeline is connected between a discharge hole of the dispersion tank and a feed inlet of the transfer tank, the fourth pipeline is connected between a discharge hole of the transfer tank and a first port of the three-way valve, the fifth pipeline is connected between a second port of the three-way valve and a feed inlet of the dispersion tank, and the sixth pipeline is connected between a third port of the three-way valve and the material return hole; the second port and the third port can be selectively closed, and when the third port is closed, the pump is used for driving the battery slurry to circulate between the circulation transfer device and the continuous dispersion device; when the second port is closed, the pump is used for driving the battery slurry to circulate among the circulation transfer device, the kneading device and the continuous dispersion device in sequence.