CN116637519A

CN116637519A - Kneader and slurry preparation method

Info

Publication number: CN116637519A
Application number: CN202310462645.6A
Authority: CN
Inventors: 李统柱; 杜保东; 金旭东; 赵凤霞; 张旺
Original assignee: Shenzhen Shangshui Intelligent Co ltd
Current assignee: Shenzhen Shangshui Intelligent Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-08-25
Anticipated expiration: 2043-04-20
Also published as: CN116637519B

Abstract

The application provides a kneader and a slurry preparation method. The kneading cylinder comprises a bottom wall, a top wall and a peripheral side wall connected between the bottom wall and the top wall, the bottom wall and the top wall are oppositely arranged, the peripheral side wall, the bottom wall and the top wall enclose to form an accommodating space, the accommodating space is used for accommodating materials to be stirred, the first spray head component is used for atomizing a first solvent and spraying towards the bottom wall, the liquid spraying speed of the second spray head component is greater than that of the first spray head component, and the second spray head component is used for spraying a second solvent to the top wall and the peripheral side wall so as to remove the materials to be stirred adhered to the top wall and the bottom wall. The first solvent is evenly added to all positions of the materials to be stirred, so that the mixing effect of the first solvent and the materials to be stirred is improved, the second nozzle component sprays the second solvent, and meanwhile the materials to be stirred adhered to the inner wall of the kneading cylinder are flushed to an effective stirring area of the kneader, so that the kneading effect of the materials to be stirred is improved.

Description

Kneader and slurry preparation method

Technical Field

The application relates to the technical field of kneading, in particular to a kneader and a slurry preparation method.

Background

In the kneading technical field, the kneading efficiency of the kneader is low.

Disclosure of Invention

The application aims to provide a kneader and a slurry preparation method, which are used for solving the technical problem of low kneading efficiency of the kneader.

In a first aspect, the present application provides a kneader comprising:

the kneading cylinder comprises a bottom wall, a top wall and a peripheral side wall connected between the bottom wall and the top wall, the bottom wall and the top wall are oppositely arranged, the peripheral side wall, the bottom wall and the top wall are enclosed to form an accommodating space, and the accommodating space is used for accommodating materials to be stirred;

the first spray head assembly is arranged on the top wall and is used for atomizing a first solvent and spraying the first solvent towards the bottom wall;

the second spray head assembly is arranged on the top wall, the spray speed of the second spray head assembly is larger than that of the first spray head assembly, and the second spray head assembly is used for spraying a second solvent to the top wall and the peripheral side wall so as to remove the materials to be stirred adhered to the top wall and the bottom wall.

In the kneader provided by the application, the peripheral side wall, the bottom wall and the top wall of the kneading cylinder are surrounded to form a containing space for containing materials to be stirred, the first spray head component is used for atomizing the first solvent and spraying the first solvent towards the bottom wall, the second spray head component is used for spraying the second solvent to the top wall and the peripheral side wall so as to remove the materials to be stirred adhered to the top wall and the bottom wall, and the spraying speed of the second spray head component is higher than that of the first spray head component. The first spray head component atomizes and sprays the first solvent to the position of the material to be stirred for stirring, so that the first solvent is effectively and uniformly added to all positions of the material to be stirred, and the mixing effect of the first solvent and the material to be stirred is improved; the second nozzle component sprays the second solvent and simultaneously washes the material to be stirred adhered to the inner wall of the kneading cylinder to an effective stirring area of the kneader, so that the material to be stirred in the kneading cylinder is stirred more fully, and the kneading effect of the material to be stirred is improved.

The second spray head assembly comprises a first pressurizing pump and at least one rotary spray head, the first pressurizing pump is used for conveying the second solvent to the rotary spray head, the rotary spray head is arranged in the accommodating space, and the rotary spray head is used for rotating and spraying the second solvent towards the peripheral side wall and/or the top wall of the kneading cylinder.

Wherein, a first through hole is arranged on the top wall;

the second nozzle assembly further comprises a first liquid inlet pipeline, one part of the first liquid inlet pipeline is arranged outside the top wall, and the other part of the first liquid inlet pipeline extends towards the accommodating space of the kneading cylinder through the first through hole on the top wall and is communicated with the rotary nozzle.

The first spray head assembly comprises a second pressurizing pump and at least one atomization spray head, the second pressurizing pump is used for conveying the first solvent to the atomization spray head, the atomization spray head is arranged in the accommodating space, and the atomization spray head is used for spraying the first solvent towards the bottom wall of the kneading cylinder;

the top wall is provided with a second through hole, the first spray head assembly further comprises a second liquid inlet pipeline, one part of the second liquid inlet pipeline is arranged outside the top wall, and the other part of the second liquid inlet pipeline extends towards the accommodating space of the kneading cylinder through the second through hole on the top wall and is communicated with the atomizing spray head.

Wherein the kneader further comprises:

the first stirring assembly is arranged in the accommodating space and comprises a rotating shaft, the rotating shaft is arranged along the central shaft of the kneading cylinder, and the first stirring assembly is used for rotating around the central shaft of the kneading cylinder and at least providing stirring centrifugal force for the materials to be stirred; a kind of electronic device with high-pressure air-conditioning system

The second stirring assembly is arranged in the accommodating space and comprises two or more stirring pieces and at least one supporting frame, the stirring pieces are adjacent to the peripheral side wall and are arranged at intervals along the circumferential direction of the peripheral side wall, every two adjacent stirring pieces are connected through the supporting frame, and the supporting frame is used for providing supporting force for the stirring pieces in the rotating process; the second stirring assembly is used for rotating around the central shaft of the kneading cylinder and providing stirring centripetal force for at least the materials to be stirred.

Wherein the kneader further comprises:

the controller is electrically connected with the first stirring assembly and the second stirring assembly and is used for controlling the rotation direction of the first stirring assembly and the rotation direction of the second stirring assembly;

the detector is electrically connected with the controller and is used for detecting the first rotation resistance born by the first stirring assembly and the second rotation resistance born by the second stirring assembly;

Wherein when the first rotation resistance is greater than or equal to a first preset resistance and/or the second rotation resistance is greater than or equal to a second preset resistance, the detector controls the first stirring assembly and the second stirring assembly to rotate in the same direction; and when the first rotation resistance is smaller than the first preset resistance and/or the second rotation resistance is smaller than the second preset resistance, the detector controls the first stirring assembly and the second stirring assembly to reversely rotate.

In a second aspect, the present application provides a slurry preparation method, prepared by the kneader, comprising:

adding an active material, a conductive agent and a binder to the kneading barrel and mixing to form a first premix;

adding a first solvent in atomized form to the kneading drums through the first nozzle assembly;

kneading the first solvent and the first premix to form a second premix;

spraying a second solvent to the inner wall of the kneading barrel through the second nozzle assembly to remove the second premix adhering to the inner wall of the kneading barrel;

kneading the second solvent and the second premix to form a preset slurry.

Wherein said adding a first solvent in atomized form to said kneading cylinder by a first nozzle assembly comprises;

and conveying the first solvent to an atomizing nozzle through a second booster pump, so that the atomizing nozzle sprays the first solvent towards the bottom wall of the kneading cylinder, and the spraying area of the atomizing nozzle at least covers part of the bottom wall of the kneading cylinder.

Wherein said injecting a second solvent through a second nozzle assembly onto an inner wall of said kneading barrel, purging said second premix adhering to the inner wall of said kneading barrel, comprising;

delivering the second solvent to a rotary nozzle by a first booster pump, and spraying the second solvent toward the peripheral side wall and/or the top wall of the kneading cylinder by the rotary nozzle;

the rotary spray head rotates under the control of rotary drive, so that the spraying area of the rotary spray head covers at least one circle of the peripheral side wall of the kneading cylinder.

Wherein said kneading said first solvent with said first premix to form a second premix comprises:

judging whether the viscosity of the mixture of the kneading cylinder is greater than or equal to a preset viscosity;

if yes, the first stirring component and the second stirring component of the kneading cylinder are controlled to rotate in the same direction, if not, the first stirring component and the second stirring component are controlled to rotate reversely, the first stirring component is close to the central shaft of the kneading cylinder, the second stirring component is close to the inner wall of the kneading cylinder, and the first stirring component and the second stirring component rotate around the central shaft of the kneading cylinder.

Wherein the judging whether the viscosity of the mixture of the kneading cylinder is greater than or equal to a preset viscosity comprises the following situations:

the first rotation resistance of the first stirring assembly is greater than or equal to a first preset resistance, and/or the second rotation resistance of the second stirring assembly is greater than or equal to a second preset resistance.

Wherein the adding and mixing of the active material, the conductive agent and the binder to the kneading barrel forms a first premix comprising:

the first stirring component and the second stirring component of the kneading cylinder are controlled to reversely rotate for stirring, wherein the stirring speed of the first stirring component is 5-10 m/s, and the stirring speed of the second stirring component is 0-2 m/s;

said kneading said first solvent with said first premix to form a second premix comprising:

the first stirring assembly and the second stirring assembly are controlled to rotate in the same direction or in opposite directions to stir, wherein the stirring speed of the first stirring assembly is 6-10 m/s, and the stirring speed of the second stirring assembly is 0-2 m/s;

the kneading of the second solvent and the second premix to form a preset slurry comprises:

And controlling the first stirring assembly and the second stirring assembly to reversely rotate for stirring, wherein the stirring speed of the first stirring assembly is 12-20 m/s, and the stirring speed of the second stirring assembly is 0-2 m/s.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a kneader according to an embodiment of the present application;

FIG. 2 is a schematic view showing a front structure of a kneader according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of the kneader provided in FIG. 2 taken along the direction A-A in an embodiment of the present application;

FIG. 4 is a schematic top view of a top wall according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a second head assembly portion of a kneader provided by an embodiment of this application;

FIG. 6 is a schematic cross-sectional view of a first head assembly portion of a kneader provided by an embodiment of this application;

FIG. 7 is a schematic view showing the structure of the upper side of the top wall of the kneader according to the embodiment of the present application;

FIG. 8 is a schematic view of a first stirring assembly and a second stirring assembly according to an embodiment of the present application;

FIG. 9 is a flow chart of a method for preparing slurry according to an embodiment of the present application;

fig. 10 is a flowchart included in a slurry preparation method S200 according to an embodiment of the present application;

fig. 11 is a flowchart included in a slurry preparation method S400 according to an embodiment of the present application;

fig. 12 is a flowchart one included in a slurry preparation method S300 according to an embodiment of the present application;

fig. 13 is a flowchart included in a slurry preparation method S100 according to an embodiment of the present application;

fig. 14 is a second flowchart included in a slurry preparation method S300 according to an embodiment of the present application;

fig. 15 is a flowchart included in a slurry preparation method S500 according to an embodiment of the present application.

Description of the reference numerals:

the mixing device comprises a kneader 100, a kneading cylinder 1, a bottom wall 11, a top wall 12, a first through hole 121, a second through hole 122, a peripheral side wall 13, a containing space 14, a first nozzle assembly 20, an atomizing nozzle 21, a second liquid inlet pipeline 22, a second nozzle assembly 30, a rotary nozzle 31, a first liquid inlet pipeline 32, a first stirring assembly 40, a second stirring assembly 50, a stirring piece 51 and a supporting frame 52.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without any inventive effort, are intended to be within the scope of the application.

Reference herein to "an embodiment" or "implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the present specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate an azimuth or a positional relationship, are used to describe positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus are not to be construed as limiting the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction of the described constituent elements. Therefore, the present invention is not limited to the words described in the specification, and may be appropriately replaced according to circumstances.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or an integral connection; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intermediate members, or may be in communication with the interior of two elements. The meaning of the above terms in the present disclosure can be understood by one of ordinary skill in the art as appropriate.

In the kneading technical field, the kneading efficiency of the kneader is low.

Referring to fig. 1 to 8, fig. 1 is a schematic perspective view of a kneader according to an embodiment of the present application, fig. 2 is a schematic front view of a kneader according to an embodiment of the present application, fig. 3 is a schematic cross-sectional view of a kneader according to an embodiment of the present application, fig. 4 is a schematic top view of a top wall according to an embodiment of the present application, fig. 5 is a schematic cross-sectional view of a second head assembly portion of a kneader according to an embodiment of the present application, fig. 6 is a schematic cross-sectional view of a first head assembly portion of a kneader according to an embodiment of the present application, fig. 7 is a schematic top wall of a kneader according to an embodiment of the present application, and fig. 8 is a schematic structure of a first stirring assembly and a second stirring assembly according to an embodiment of the present application.

The application provides a kneader 100 and a slurry preparation method, which aim to solve the technical problem of lower kneading efficiency of the kneader 100. Wherein the slurry in the slurry preparation method is prepared by the kneader 100.

The kneader 100 can be used for stirring the materials to be stirred, and improves the uniformity and kneading degree of the materials to be stirred. The kneader 100 according to the present embodiment may include various components, and the present embodiment is schematically described only with respect to the application of the kneader 100 to a battery paste. However, this does not represent that the kneader 100 of the present embodiment is necessarily applied to the battery paste. In other embodiments, the kneader 100 may be applied to other fields, such as fertilizer fields, construction fields, and the like. In addition, the slurry preparation method provided in the present embodiment is applied to the preparation of battery slurry for illustration, and in other embodiments, the slurry preparation method may be applied to the preparation of other types of slurry, which is not limited in the present application.

In this embodiment, the process of preparing the slurry is mainly divided into three stages, specifically: the raw materials are kneaded into required preset slurry after three stages of slurry preparation, namely a mixing stage, a kneading stage and a diluting stage. Further, the kneading stage and the diluting stage are all carried out in the kneader 100 of the present application.

Specifically, the kneader 100 includes a kneading barrel 1, a first head assembly 20, and a second head assembly 30. The kneading cylinder 1 comprises a bottom wall 11, a top wall 12 and a peripheral side wall 13 connected between the bottom wall 11 and the top wall 12, the bottom wall 11 is opposite to the top wall 12, the peripheral side wall 13, the bottom wall 11 and the top wall 12 enclose to form an accommodating space 14, and the accommodating space 14 is used for accommodating materials to be stirred.

The shape of the kneading barrel 1 includes, but is not limited to, a cylindrical shape, a rectangular parallelepiped shape, or other shapes, and the present application is exemplified by the shape of the kneading barrel 1 as a cylindrical shape, and is not to be construed as limiting the present application.

The kneading barrel 1 has a cylindrical shape, and the kneading barrel 1 includes a central axis which is the central axis of the cylinder (as shown in fig. 3, the dotted line portion α in fig. 3 is the central axis of the kneading barrel 1).

The first spray head assembly 20 is disposed on the top wall 12, and the first spray head assembly 20 is used for atomizing the first solvent and spraying toward the bottom wall 11.

Specifically, during the kneading stage of slurry preparation, the first spray head assembly 20 is used to atomize the first solvent and spray it toward the bottom wall 11 so that the first solvent is thoroughly mixed with the material to be stirred. The first solvent is added into the material to be stirred in an atomized mode for mixing, so that the uniformity of mixing of the first solvent and the material to be stirred can be effectively improved, and the mixing effect of the material to be stirred is improved. Moreover, the first nozzle assembly 20 is used for atomizing the first solvent and spraying the first solvent towards the bottom wall 11, so that the atomized first solvent can be prevented from being sprayed to the peripheral side wall 13 or the bottom wall 11 of the kneading cylinder 1, and cannot be effectively mixed with the materials to be stirred.

The second spray head assembly 30 is disposed on the top wall 12, the spray speed of the second spray head assembly 30 is greater than the spray speed of the first spray head assembly 20, and the second spray head assembly 30 is used for spraying a second solvent to the top wall 12 and the peripheral side wall 13 to remove the materials to be stirred adhered to the top wall 12 and the bottom wall 11.

Specifically, in the dilution stage of slurry preparation, the second nozzle assembly 30 is configured to pressurize and spray the second solvent onto the top wall 12 and the peripheral side wall 13, and the second solvent with a certain impact force can remove the materials to be stirred adhered to the top wall 12 and the bottom wall 11 and flush the materials to be stirred into the effective stirring area of the kneader 100. And the second solvent also flows to the region near the bottom wall 11 at the same time and is kneaded with the material to be kneaded.

It should be noted that the first solvent and the second solvent may be the same or different solvents, and the present application is not limited to this, and the first solvent and the second solvent are named differently for convenience of distinction.

In the kneader 100 provided by the application, the peripheral side wall 13 of the kneading cylinder 1, the bottom wall 11 and the top wall 12 are surrounded to form the containing space 14 for containing the materials to be stirred, the first spray head assembly 20 is used for atomizing the first solvent and spraying the first solvent towards the bottom wall 11, the second spray head assembly 30 is used for spraying the second solvent to the top wall 12 and the peripheral side wall 13 so as to remove the materials to be stirred adhered to the top wall 12 and the bottom wall 11, and the spray speed of the second spray head assembly 30 is greater than the spray speed of the first spray head assembly 20. The first spray head assembly 20 atomizes and sprays the first solvent to the position of the material to be stirred for stirring, so that the first solvent is effectively and uniformly added to all positions of the material to be stirred, and the mixing effect of the first solvent and the material to be stirred is improved; the second nozzle assembly 30 sprays the second solvent and simultaneously washes the material to be stirred adhered to the inner wall of the kneading cylinder 1 to the effective stirring area of the kneader 100, so that the material to be stirred in the kneading cylinder 1 is stirred more fully, and the kneading effect of the material to be stirred is improved.

The second nozzle assembly 30 includes a first pressurizing pump (not shown) for delivering the second solvent to the rotary nozzle 31, and at least one rotary nozzle 31 provided in the receiving space 14, the rotary nozzle 31 for rotating and spraying the second solvent toward the peripheral side wall 13 and/or the top wall 12 of the kneading cylinder 1.

Specifically, the first pressurizing pump is used to pressurize the second solvent and enable the second solvent to be ejected from the rotary head 31 at a preset liquid ejection speed. It should be noted that when the second solvent is sprayed toward the inner wall of the kneading cylinder 1 at the preset spray speed, the second solvent may flush the material to be stirred adhering to the inner wall of the kneading cylinder 1 to the effective stirring area of the kneader 100.

In one embodiment, the rotary jetting head 31 is for rotating and jetting the second solvent toward the peripheral side wall 13 of the kneading cylinder 1; in another embodiment, the rotary jet 31 is used to rotate and jet the second solvent toward the top wall 12 of the kneading cylinder 1; in still another embodiment, the rotary jet 31 is used to rotate and jet the second solvent toward the peripheral side wall 13 and the top wall 12 of the kneading cylinder 1, which is not limited in the present application.

Alternatively, in the present embodiment, the rotation angle of the rotary jet 31 is 360 ° so that the ejection area of the rotary jet 31 for ejecting the second solvent covers at least one circumference of the circumferential side wall 13 of the kneading barrel 1, in other words, the rotary jet 31 can eject the second solvent to the circumferential side wall 13 of the kneading barrel 1 without dead angle. Alternatively, in other embodiments, the rotation angle of the rotary sprayer 31 may be 30 °, or 60 °, or 120 °, or 180 °, or 250 °, or other degrees, which is not limited by the present application.

Alternatively, the arrangement and number of the rotary sprayers 31 are not limited, in this embodiment, the number of the rotary sprayers 31 is 4, and the rotary sprayers 31 are arrayed on the top wall 12, so that the second solvent sprayed by the rotary sprayers 31 can cover one circle of the side wall 13 of the kneading cylinder. In other embodiments, the number of the rotary sprayers 31 may be 2, or 3, or 5, or other numbers, and the plurality of rotary sprayers 31 may be arranged in a ring shape or other arrangement, which is not limited in the present application.

The top wall 12 is provided with a first through hole 121. The second nozzle assembly 30 further includes a first liquid inlet pipe 32, a portion of the first liquid inlet pipe 32 is disposed outside the top wall 12, and another portion of the first liquid inlet pipe 32 extends toward the accommodating space 14 of the kneading cylinder 1 through the first through hole 121 on the top wall 12 and is communicated with the rotary nozzle 31.

Most of the first liquid inlet pipeline 32 is arranged on one side of the top wall 12, which is away from the bottom wall 11, and is not arranged in the accommodating space 14 of the kneading cylinder 1, so that materials to be stirred cannot adhere to the first liquid inlet pipeline 32, and the utilization rate and stirring effect of the kneader 100 on the materials to be stirred are improved.

Specifically, the first liquid inlet pipe 32 includes a first communicating body portion and at least one first extending portion, the first body portion is disposed on a side of the top wall 12 away from the bottom wall 11, and the first extending portion extends into the first through hole 121 toward the bottom wall 11 and is communicated with the rotary sprayer 31.

The first nozzle assembly 20 includes a second pressurizing pump (not shown) for delivering the first solvent to the nozzle 21, and at least one atomizer 21, the atomizer 21 being disposed in the receiving space 14, the atomizer 21 being for spraying the first solvent toward the bottom wall 11 of the kneading cylinder 1.

Specifically, the second pressurizing pump is used to pressurize the first solvent and enable the first solvent to be ejected from the atomizing head 21. When the first solvent is sprayed from the atomizer 21 toward the bottom wall 11 of the kneading cylinder 1, the spraying area of the atomizer 21 may be 60% to 90% of the area of the bottom wall 11, alternatively, the spraying area of the atomizer 21 may be 60% or 65% or 70% or 71% or 82% or 90% or other percentage of the area of the bottom wall 11. When the spraying area of the atomizing nozzle 21 occupies 60% -90% of the area of the bottom wall 11, the first solvent sprayed by the atomizing nozzle 21 can be sprayed onto the material to be stirred, so that the mixing efficiency of the first solvent and the material to be stirred is improved.

The top wall 12 is provided with a second through hole 122, the first nozzle assembly 20 further comprises a second liquid inlet pipe 22, a part of the second liquid inlet pipe 22 is disposed outside the top wall 12, and another part of the second liquid inlet pipe 22 extends towards the accommodating space 14 of the kneading cylinder 1 through the second through hole 122 on the top wall 12 and is communicated with the atomizing nozzle 21.

Most of the second liquid inlet pipeline 22 is arranged on one side of the top wall 12, which is away from the bottom wall 11, and is not arranged in the accommodating space 14 of the kneading cylinder 1, so that the materials to be stirred cannot adhere to the second liquid inlet pipeline 22, and the utilization rate and stirring effect of the kneader 100 on the materials to be stirred are improved.

Specifically, the second liquid inlet pipe 22 includes a second communicating body portion and at least one second extending portion, the second body portion is disposed on a side of the top wall 12 away from the bottom wall 11, and the second extending portion extends into the second through hole 122 toward the bottom wall 11 and is communicated with the atomizer head 21.

Optionally, the arrangement manner and number of the atomizing nozzles 21 are not limited, in this embodiment, the number of the atomizing nozzles 21 is 4, and the atomizing nozzles 21 are arrayed on the top wall 12, so that the first solvent sprayed by the atomizing nozzles 21 can cover the material to be stirred as much as possible. In other embodiments, the number of the atomizing nozzles 21 may be 2, or 3, or 5, or other numbers, and the plurality of atomizing nozzles 21 may be arranged in a circular shape or other arrangements, which is not limited in the present application.

The kneader 100 further comprises a first stirring element 40 and a second stirring element 50.

The first stirring assembly 40 is disposed in the accommodating space 14, the first stirring assembly 40 includes a rotating shaft, the rotating shaft is disposed along the central axis of the kneading cylinder 1, and the first stirring assembly 40 is configured to rotate around the central axis of the kneading cylinder 1, and at least provides stirring centrifugal force for the material to be stirred.

The second stirring assembly 50 is disposed in the accommodating space 14, the second stirring assembly 50 includes two or more stirring members 51 and at least one supporting frame 52, the plurality of stirring members 51 are adjacent to the peripheral sidewall 13 and are disposed at intervals along the circumferential direction of the peripheral sidewall 13, each two adjacent stirring members 51 are connected by the supporting frame 52, and the supporting frame 52 is used for providing supporting force for the plurality of stirring members 51 in the rotating process; the second stirring assembly 50 is configured to rotate about the central axis of the kneading drum 1 to provide at least a stirring centripetal force to the material to be stirred.

The central axis of the kneading barrel 1 is a virtual body, specifically, a line connecting the center of the top wall 12 of the kneading barrel 1 and the center of the bottom wall 11 of the kneading barrel 1 (as shown in fig. 3, the dotted line portion α in fig. 3 is the central axis of the kneading barrel 1). The arrangement of the rotating shaft along the central axis of the kneading cylinder 1 means that the rotating shaft is arranged at the right center of the kneading cylinder 1.

In this embodiment, the second stirring assembly 50 connects at least two or more stirring members 51 into a whole through the supporting frame 52, so that the supporting frame 52 provides supporting force for the second stirring assembly 50 when rotating around the central axis of the kneading cylinder 1, so that the distance between the adjacent stirring members 51 is kept fixed, and further the at least two stirring members 51 keep their shapes during stirring, so that the overall structure of the second stirring assembly 50 is more stable, and the second stirring assembly 50 is beneficial to stirring materials to be stirred. In addition, since the second stirring member 50 is stable in the overall structure, it is possible to avoid damage to the wall of the kneading barrel 1 due to deformation occurring when stirring the material to be stirred having a large viscosity.

Alternatively, the circumferential outer contour of the support frame 52 is polygonal, annular, or the like.

Optionally, the second stirring assembly 50 includes a plurality of supporting frames 52, and the plurality of supporting frames 52 are arranged at intervals along the direction parallel to the central axis of the kneading cylinder 1, so that two adjacent stirring members 51 are connected through the plurality of supporting frames 52, and the stability of the overall structure of the second stirring assembly 50 is further improved.

In the present embodiment, the first stirring member 40 is disposed entirely along the central axis of the kneading cylinder 1, and the first stirring member 40 rotates around the central axis of the kneading cylinder 1 to provide at least stirring centrifugal force to the material to be stirred. At least two stirring members 51 in the second stirring assembly 50 are arranged at intervals along the circumferential direction of the circumferential side wall 13, so that the at least two stirring members 51 are annularly arranged on the outer circumferential side of the first stirring assembly 40, and the second stirring assembly 50 rotates around the central axis of the kneading cylinder 1 to at least provide stirring centripetal force for the materials to be stirred. Therefore, when the first stirring members 40 and the second stirring members 50 work together, the material to be stirred located near the central axis of the kneading cylinder 1 is moved toward the peripheral side wall 13 by the stirring centrifugal force provided by the first stirring members 40, and the material to be stirred located near the peripheral side wall 13 is moved toward the vicinity of the central axis of the kneading cylinder 1 by the stirring centrifugal force provided by the second stirring members 50, so that the material to be stirred forms turbulence between the first stirring members 40 and the second stirring members 50, and the stirring efficiency of the material to be stirred is improved, so that the material to be stirred is kneaded more sufficiently. Wherein the second stirring assembly 50 can enhance the turbulent effect by providing a stirring centripetal force by means of at least two stirring members 51 arranged along the peripheral side wall 13.

In addition, at least two stirring members 51 are proximate to the peripheral side wall 13, so that the at least two stirring members 51 are also capable of scraping off the material to be stirred adhering to the peripheral side wall 13 when the second stirring assembly 50 rotates about the central axis of the kneading cylinder 1, improving the stirring effect. Alternatively, the spacing between the stirring member 51 and the peripheral side wall 13 is 3mm to 10mm, for example, the spacing between the stirring member 51 and the peripheral side wall 13 may be, but is not limited to, 3mm, or 5mm, or 7mm, or 9mm, or 10mm, or other values between 3mm and 10 mm.

Alternatively, the rotation direction of the first stirring assembly 40 and the second stirring assembly 50 about the central axis of the kneading cylinder 1 is the same or different, specifically described later in detail. Wherein the first agitating assembly 40 is also referred to as a fast paddle and the second agitating assembly 50 is also referred to as a slow paddle. It should be noted that the rotation speed of the first stirring member 40 is not always higher than the rotation speed of the second stirring member 50 in the whole process of kneading the materials to be stirred by the kneader 100.

In summary, the second stirring assembly 50 in the kneader 100 provided by the present application connects at least two stirring members 51 together by the supporting frame 52, and the supporting frame 52 provides a supporting force for the second stirring assembly 50 when rotating around the central axis of the kneading cylinder 1, so that the distance between the adjacent stirring members 51 is kept fixed, thereby realizing that the at least two stirring members 51 keep their shape during stirring, making the overall structure of the second stirring assembly 50 more stable, and further improving the stirring quality of the second stirring assembly 50. In addition, the first stirring assembly 40 and the second stirring assembly 50 rotate cooperatively, the first stirring assembly 40 is used for centrifugally stirring the materials to be stirred, and the second stirring assembly 50 is used for centripetally stirring the materials to be stirred, so that turbulence is formed between the first stirring assembly 40 and the second stirring assembly 50, stirring efficiency is improved, and the materials to be stirred are kneaded more fully. Therefore, the kneader 100 provided by the present application is stable in kneading and good in kneading effect.

The kneader 100 further comprises a controller and a detector. The controller is electrically connected to the first stirring assembly 40 and the second stirring assembly 50, and is used for controlling the rotation direction of the first stirring assembly 40 and the rotation direction of the second stirring assembly 50. The detector is electrically connected to the controller and is configured to detect a first rotational resistance experienced by the first agitating assembly 40 and a second rotational resistance experienced by the second agitating assembly 50.

Wherein when the first rotational resistance is greater than or equal to a first preset resistance and/or the second rotational resistance is greater than or equal to a second preset resistance, the detector controls the first stirring assembly 40 and the second stirring assembly 50 to rotate in the same direction; when the first rotational resistance is less than the first preset resistance and/or the second rotational resistance is less than the second preset resistance, the detector controls the first stirring assembly 40 to rotate in a reverse direction to the second stirring assembly 50.

In this embodiment, the controller is configured to control the first stirring assembly 40 and the second stirring assembly 50 to rotate in the same direction or in opposite directions, so as to perform targeted stirring for the thick state of the material to be stirred, thereby improving the kneading effect and efficiency of the kneader 100.

The detector includes a first detector for detecting a rotational resistance received by the first agitating assembly 40 and transmitting the detected resistance information to the controller, and a second detector; the second detector is used for detecting the rotation resistance of the second stirring assembly 50 and transmitting the detected resistance information to the controller. The controller controls the rotation directions of the first stirring member 40 and the second stirring member 50 based on the information detected by the first detector and the second detector. Specifically, when the rotational resistance of the first stirring assembly 40 is greater than or equal to the first preset resistance and/or the rotational resistance of the second stirring assembly 50 is greater than or equal to the second preset resistance, the controller controls the first stirring assembly 40 and the second stirring assembly 50 to rotate in the same direction, so that the stirring resistance can be reduced, the torque of the motor can be reduced, the overload of the motor can be prevented, and the overall stability of the kneader 100 can be improved. When the rotation resistance of the first stirring assembly 40 is smaller than the first preset resistance and the rotation resistance of the second stirring assembly 50 is smaller than the second preset resistance, the controller controls the first stirring assembly 40 and the second stirring assembly 50 to reversely rotate, so that the rotation speed difference between the first stirring assembly 40 and the second stirring assembly 50 can be increased, turbulence is more obvious, the stirring effect of the materials to be stirred is improved, and the kneading effect of the materials to be stirred is further improved.

Kneader 100 further comprises a first motor for rotating first stirring element 40 and a second motor for rotating second stirring element 50.

Optionally, the first detector and the second detector are force sensors, and are configured to detect torque forces received by the first motor and the second motor, respectively, where the greater the torque forces received by the first motor and the second motor, the greater the rotational resistance received by the first stirring assembly 40 and the second stirring assembly 50. Alternatively, the first and second detectors are current sensors for detecting the load currents of the first and second motors, respectively, and the greater the load currents of the first and second motors, the greater the rotational resistance received by the first and second stirring members 40 and 50.

Alternatively, the rotational speeds of the first stirring assembly 40 and the second stirring assembly 50 are equal or unequal. Optionally, the rotational speed of the first agitating assembly 40 is 0-20m/s; the rotational speed of the second agitating assembly 50 is 0-2m/s. In other words, the first stirring assembly 40 may be understood as a high speed paddle and the second stirring assembly 50 may be understood as a low speed paddle.

Referring to fig. 9, fig. 9 is a flowchart of a slurry preparation method according to an embodiment of the application. The present application also provides a slurry preparation method including, but not limited to, steps S100, S200, S300, S400, and S500, the detailed description of which is as follows.

S100: the active material, the conductive agent and the binder are added to the kneading cylinder 1 and mixed to form a first premix.

The kneader 100 includes a first stirring assembly 40 and a second stirring assembly 50, and the first stirring assembly 40 and the second stirring assembly 50 are for rotating about a central axis and stirring kneaded active material, conductive agent and binder to form a first premix.

Specifically, the first stirring assembly 40 is disposed entirely along the central axis of the kneading cylinder 1, and the first stirring assembly 40 rotates around the central axis of the kneading cylinder 1 to provide at least stirring centrifugal force to the material to be stirred. At least two stirring members 51 in the second stirring assembly 50 are arranged at intervals along the circumferential direction of the circumferential side wall 13, so that the at least two stirring members 51 are annularly arranged on the outer circumferential side of the first stirring assembly 40, and the second stirring assembly 50 rotates around the central axis of the kneading cylinder 1 to at least provide stirring centripetal force for the materials to be stirred.

Wherein the active material, the conductive agent and the binder are mixed for a period of time ranging from 5 minutes to 10 minutes. Alternatively, the active, conductive agent, and adhesive mixing time period may be 5 minutes, or 6 minutes, or 7 minutes, or 8 minutes, or 9 minutes, or 10 minutes, or other times within the range of 5 minutes to 10 minutes. Alternatively, the mixing time of the active material, the conductive agent and the binder may be in other ranges, for example, 1 minute to 50 minutes, or 5 minutes to 30 minutes, or other ranges, which is not limited by the present application.

S200: the first solvent is fed into the kneading cylinder 1 in an atomized form through the first nozzle assembly 20.

Specifically, the first spray head assembly 20 is used to atomize the first solvent and spray it toward the bottom wall 11 so that the first solvent is thoroughly mixed with the material to be stirred.

S300: kneading the first solvent with the first premix to form a second premix.

The first stirring assembly 40 and the second stirring assembly 50 are configured to rotate about a central axis and stir-knead the first solvent with the first premix to form a second premix.

Wherein the kneading time period of the first solvent and the first premix ranges from 5 minutes to 20 minutes. Alternatively, the active, conductive agent, and adhesive mixing time period may be 5 minutes, or 7 minutes, or 9 minutes, or 12 minutes, or 18 minutes, or 20 minutes, or other times within the range of 5 minutes to 20 minutes. Alternatively, the kneading time period of the first solvent and the first premix may be in other ranges, for example, 1 minute to 50 minutes, or 5 minutes to 30 minutes, or other ranges, which is not limited in the present application.

S400: the second solvent is sprayed to the inner wall of the kneading barrel 1 through the second nozzle assembly 30, and the second premix adhering to the inner wall of the kneading barrel 1 is purged.

Specifically, the second nozzle assembly 30 is configured to pressurize and spray the second solvent onto the top wall 12 and the peripheral side wall 13, and the second solvent with a certain impact force can remove the materials to be stirred adhered to the top wall 12 and the bottom wall 11 and flush the materials to be stirred into the effective stirring area of the kneader 100. And the second solvent also flows to the region near the bottom wall 11 at the same time and is kneaded with the material to be kneaded.

S500: kneading the second solvent and the second premix to form a preset slurry.

The first stirring assembly 40 and the second stirring assembly 50 are used for rotating relative to the central shaft and stirring and kneading the second solvent and the second premix to form a preset slurry.

Wherein the kneading time period of the second solvent and the second premix ranges from 5 minutes to 20 minutes. Alternatively, the active, conductive agent, and adhesive mixing time period may be 5 minutes, or 7 minutes, or 9 minutes, or 12 minutes, or 18 minutes, or 20 minutes, or other times within the range of 5 minutes to 20 minutes. Alternatively, the kneading time period of the second solvent and the second premix may be in other ranges, for example, 1 minute to 50 minutes, or 5 minutes to 30 minutes, or other ranges, which is not limited in the present application.

Here, step S100 is in the mixing stage in the slurry preparation, step S200 and step S300 are in the kneading stage in the slurry preparation, and step S400 and step S500 are in the dilution stage in the slurry preparation. The above-mentioned materials to be stirred include, but are not limited to, a first premix, a second premix and a preset slurry, which are individually named for convenience of distinction and should not be construed as limiting the present application.

In this embodiment, the slurry prepared by the slurry preparation method is an electrode slurry, and optionally, the electrode slurry includes, but is not limited to, a positive electrode slurry or a negative electrode slurry. When the electrode slurry is a positive electrode slurry, the active material includes, but is not limited to, graphite, and the first solvent and the second solvent include, but are not limited to, N-methylpyrrolidone (NMP); when the electrode slurry is a negative electrode slurry, the active material includes, but is not limited to, lithium iron carbonate, and the first solvent and the second solvent include, but are not limited to, deionized water.

In the slurry preparation method provided by the application, the active substance, the conductive agent and the adhesive are added into the kneading cylinder 1 and mixed to form a first premix, a first solvent is added into the kneading cylinder 1 in an atomized form through the first nozzle assembly 20, the first solvent and the first premix are kneaded to form a second premix, the second solvent is sprayed to the inner wall of the kneading cylinder 1 through the second nozzle assembly 30, the second premix adhered to the inner wall of the kneading cylinder 1 is removed, and the second solvent and the second premix are kneaded to form a preset slurry. Spraying the first solvent to the position of the material to be stirred in an atomized mode for stirring, so that the first solvent is effectively and uniformly added to all positions of the material to be stirred, and the mixing effect of the first solvent and the material to be stirred is improved; the second solvent is sprayed toward the inner wall of the kneading cylinder 1 and washes the material to be stirred adhered to the inner wall of the kneading cylinder 1 to the effective stirring area of the kneader 100, so that the material to be stirred in the kneading cylinder 1 is stirred more sufficiently, and the kneading effect of the material to be stirred is improved.

Referring to fig. 10, fig. 10 is a flowchart included in a slurry preparation method S200 according to an embodiment of the application. The step S200 of adding the first solvent in atomized form to the kneading drums 1 by the first nozzle assembly 20 includes a step S210, which is described in detail below with respect to the step S210.

Step S210: the first solvent is delivered to the atomizing head 21 by a second pressurizing pump, and the atomizing head 21 is sprayed toward the bottom wall 11 of the kneading cylinder 1, so that the spraying area of the atomizing head 21 covers at least a part of the bottom wall 11 of the kneading cylinder 1.

Referring to fig. 11, fig. 11 is a flowchart included in a slurry preparation method S400 according to an embodiment of the application. The spraying of the second solvent to the inner wall of the kneading barrel 1 through the second nozzle assembly 30 as described in step S400, the removal of the second premix adhering to the inner wall of the kneading barrel 1, including step S410 and step S420, is described in detail below with respect to step S410 and step S420.

S410: the second solvent is delivered to the rotary jet 31 by a first pressurizing pump, and the rotary jet 31 is directed toward the peripheral side wall 13 and/or the top wall 12 of the kneading cylinder 1.

S420: the rotary jet 31 is rotated under the control of the rotary drive such that the ejection area of the rotary jet 31 covers at least one revolution of the circumferential side wall 13 of the kneading cylinder 1.

It should be noted that, step S410 and step S420 are not time-sequential, and should not be construed as limiting the present application.

Referring to fig. 12, fig. 12 is a flowchart one included in a slurry preparation method S300 according to an embodiment of the application. The kneading of the first solvent and the first premix in step S300 forms a second premix, including step S310, as described in detail below with respect to step S310.

S310: judging whether the viscosity of the mixture of the kneading cylinder 1 is greater than or equal to a preset viscosity.

If yes, the first stirring assembly 40 and the second stirring assembly 50 of the kneading cylinder 1 are controlled to rotate in the same direction, if not, the first stirring assembly 40 and the second stirring assembly 50 are controlled to rotate reversely, the first stirring assembly 40 is close to the central shaft of the kneading cylinder 1, the second stirring assembly 50 is close to the inner wall of the kneading cylinder 1, and the first stirring assembly 40 and the second stirring assembly 50 rotate around the central shaft of the kneading cylinder 1.

The mixture of the kneading drums 1 includes, but is not limited to, a mixture of a first solvent, a first mixture, or other raw materials.

In this embodiment, the preset viscosity may be in the range of 500pa·s to 1000pa·s, alternatively, the preset viscosity may be 500pa·s, or 550pa·s, or 600pa·s, or 710pa·s, or 820pa·s, or 990pa·s, or 1000pa·s, or other values within 500pa·s to 1000pa·s. The range of the preset viscosity may be adjusted according to the material to be stirred, and may be 100pa·s to 500pa·s, or 1000pa·s to 5000pa·s, or other ranges, or the present application is not limited thereto.

Specifically, in the present embodiment, the preparation slurry kneading stage is roughly divided into a first sub-stage, a second sub-stage, and a third sub-stage in time sequence. Wherein, in the first sub-stage, the viscosity of the mixture (to-be-stirred material) in the kneading cylinder 1 is smaller than the preset viscosity, and the first stirring assembly 40 and the second stirring assembly 50 are reversely rotated; in the second sub-stage, the viscosity of the mixture (to-be-stirred material) in the kneading cylinder 1 is greater than the preset viscosity, and the first stirring assembly 40 and the second stirring assembly 50 rotate in the same direction; in the third sub-stage, the viscosity of the mixture (the material to be stirred) in the kneading cylinder 1 is greater than the preset viscosity, and the first stirring member 40 and the second stirring member 50 are rotated in the opposite directions.

The step S310 of determining whether the viscosity of the mixture in the kneading barrel is greater than or equal to a preset viscosity includes the following cases: the first rotational resistance of the first stirring assembly 40 is greater than or equal to a first predetermined resistance and/or the second rotational resistance of the second stirring assembly 50 is greater than or equal to a second predetermined resistance.

Specifically, when the rotational resistance of the first stirring assembly 40 is greater than or equal to the first preset resistance and/or the rotational resistance of the second stirring assembly 50 is greater than or equal to the second preset resistance, the controller controls the first stirring assembly 40 and the second stirring assembly 50 to rotate in the same direction, so that the stirring resistance can be reduced, the torque of the motor can be reduced, the overload of the motor can be prevented, and the overall stability of the kneader 100 can be improved. When the rotation resistance of the first stirring assembly 40 is smaller than the first preset resistance and the rotation resistance of the second stirring assembly 50 is smaller than the second preset resistance, the controller controls the first stirring assembly 40 and the second stirring assembly 50 to reversely rotate, so that the rotation speed difference between the first stirring assembly 40 and the second stirring assembly 50 can be increased, turbulence is more obvious, the stirring effect of the materials to be stirred is improved, and the kneading effect of the materials to be stirred is further improved.

Referring to fig. 13, fig. 13 is a flowchart included in a slurry preparation method S100 according to an embodiment of the application. The step S100 of adding the active material, the conductive agent and the binder to the kneading cylinder 1 and mixing them to form a first premix includes a step S101, and a detailed description about the step S101 is as follows.

S101: the first stirring assembly 40 and the second stirring assembly 50 of the kneading cylinder 1 are controlled to reversely rotate for stirring, wherein the stirring speed of the first stirring assembly 40 is 5 m/s-10 m/s, and the stirring speed of the second stirring assembly 50 is 0 m/s-2 m/s.

Specifically, in the present embodiment, if the stirring speed of the first stirring member 40 is less than 5m/s, the mixing effect of the active material, the conductive agent and the binder may be poor; if the stirring speed of the first stirring assembly 40 is greater than 10m/s, the temperature of the stirred materials is too high due to heating, which is not favorable for the kneader 100 to uniformly mix the stirred materials.

Alternatively, the speed of the first agitating assembly 40 may be 5m/s, or 6m/s, or 7m/s, or 8m/s, or 9m/s, or 10m/s, or other values within the range of 5m/s to 10 m/s. The speed of the second agitating assembly 50 may be 0.1m/s, or 0.5m/s, or 1m/s, or 1.3m/s, or 1.7m/s, or 2m/s, or other values within the range of 0m/s to 2m/s.

Referring to fig. 14, fig. 14 is a second flowchart included in a slurry preparation method S300 according to an embodiment of the application. Kneading the first solvent and the first premix as described in step S300 to form a second premix includes step S301, and the detailed description of step S301 is as follows.

S301: the first stirring assembly 40 and the second stirring assembly 50 are controlled to rotate in the same direction or in opposite directions to stir, wherein the stirring speed of the first stirring assembly 40 is 6 m/s-10 m/s, and the stirring speed of the second stirring assembly 50 is 0 m/s-2 m/s.

Specifically, in the present embodiment, if the stirring speed of the first stirring member 40 is less than 6m/s, the kneading effect of the first solvent and the first premix may be poor; if the stirring speed of the first stirring member 40 is greater than 10m/s, the temperature of the stirred material may be excessively high due to heat generation, which is disadvantageous for kneading the material to be stirred by the kneader 100.

Alternatively, the speed of the first agitating assembly 40 may be 6m/s, or 7m/s, or 8m/s, or 9m/s, or 10m/s, or other values within the range of 5m/s to 10 m/s.

Referring to fig. 15, fig. 15 is a flowchart included in a slurry preparation method S500 according to an embodiment of the application. The kneading of the second solvent and the second premix in step S500 forms a preset slurry, including step S501, and the detailed description of step S501 is as follows.

S501: and controlling the first stirring assembly 40 and the second stirring assembly 50 to reversely rotate for stirring, wherein the stirring speed of the first stirring assembly 40 is 12-20 m/s, and the stirring speed of the second stirring assembly 50 is 0-2 m/s.

Specifically, in the present embodiment, if the stirring speed of the first stirring member 40 is less than 12m/s, the kneading dilution effect of the second solvent and the second premix may be poor; if the stirring speed of the first stirring member 40 is greater than 20m/s, the stirring material may be splashed, and the kneading efficiency of the kneader 100 may be lowered, which is disadvantageous for kneading the material to be stirred by the kneader 100.

Alternatively, the speed of the first agitating assembly 40 may be 12m/s, or 13m/s, or 15m/s, or 16m/s, or 20m/s, or other values within the range of 12m/s to 20 m/s.

The stirring speed of the first stirring assembly 40 may be changed according to the viscosity of the material to be stirred. In other words, the greater the viscosity of the mix, the greater the agitation speed of the first agitating assembly 40, and the lesser the viscosity of the mix, the lesser the agitation speed of the first agitating assembly 40. The stirring speed of the first stirring member 40 is adjusted according to the change in viscosity of the material to be stirred to improve the kneading efficiency of the kneader 100.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the application, and such changes and modifications are intended to be included within the scope of the application.

Claims

1. A kneader, characterized by comprising:

the first spray head assembly is arranged on the top wall and is used for atomizing a first solvent and spraying the first solvent towards the bottom wall; and

2. The kneader according to claim 1, characterized in that the second head assembly comprises a first pressurizing pump for delivering the second solvent to the rotary head provided in the housing space and at least one rotary head for rotating and ejecting the second solvent toward the peripheral side wall and/or the top wall of the kneading cylinder.

3. Kneader according to claim 2, characterised in that the top wall is provided with a first through hole;

4. The kneader of claim 1, characterised in that the first nozzle assembly comprises a second booster pump for delivering the first solvent to the atomizer nozzle, which is provided in the receiving space, and at least one atomizer nozzle for spraying the first solvent toward the bottom wall of the kneader cylinder;

5. The kneader according to claim 1, characterized in that the kneader further comprises:

6. The kneader according to claim 5, characterized in that the kneader further comprises:

7. A method for preparing a slurry by the kneader according to any one of claims 1 to 6, characterized by comprising:

kneading the first solvent and the first premix to form a second premix;

Kneading the second solvent and the second premix to form a preset slurry.

8. The method of preparing a slurry according to claim 7, wherein the adding the first solvent in atomized form to the kneading cylinder through the first nozzle assembly comprises;

9. The method of preparing slurry according to claim 7, wherein the injecting the second solvent through the second nozzle assembly to the inner wall of the kneading cylinder, removing the second premix adhering to the inner wall of the kneading cylinder, comprises;

10. The slurry preparation method according to claim 7, wherein the kneading the first solvent and the first premix to form a second premix comprises:

11. The method according to claim 10, wherein the judging whether the viscosity of the mixture of the kneading drums is greater than or equal to a preset viscosity comprises the following cases:

12. The method of preparing a slurry according to claim 7, wherein the adding and mixing the active material, the conductive agent and the binder into the kneading cylinder to form a first premix comprises: