CN219355969U

CN219355969U - Stirring device for producing positive electrode slurry

Info

Publication number: CN219355969U
Application number: CN202320524942.4U
Authority: CN
Inventors: 胡卫国; 黄培英; 舒洋
Original assignee: Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Technology Ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-18
Anticipated expiration: 2033-03-17

Abstract

The utility model relates to the technical field of positive electrode slurry production equipment, and discloses a stirring device for producing positive electrode slurry. This agitating unit is used in production of anodal thick liquids, through the bottom rabbling mechanism that sets up, in the use, drive the sliding shaft through the biax motor that sets up and carry out reciprocating motion, make the sliding shaft drive stirring ring and carry out reciprocating motion to make stirring ring upwards carry the thick liquids of churn bottom deposit, and then avoid anodal thick liquids to deposit downwards, improve the mixing effect of thick liquids.

Description

Stirring device for producing positive electrode slurry

Technical Field

The utility model relates to the technical field of positive electrode slurry production equipment, in particular to a stirring device for producing positive electrode slurry.

Background

The positive electrode slurry is composed of multiple raw materials with different specific gravities and different granularities, and is formed by mixing and dispersing solid-liquid phases, and the slurry formed by the method belongs to non-Newtonian fluid. The preparation process of the positive electrode slurry is to mix and disperse various components in the slurry according to standard proportion to prepare the slurry so as to facilitate uniform coating and ensure the uniformity of the pole piece.

The utility model discloses a positive electrode slurry stirring device for battery production (with an authorized bulletin number of CN 215782846U), which belongs to the technical field of battery slurry and comprises a stirring barrel and a bottom fixing frame, wherein a barrel cover is arranged at the top of the stirring barrel, a first motor is arranged at the top of the barrel cover, a driving shaft is arranged at the output end of the first motor, a top fixing frame is arranged at the bottom of the driving shaft, a central tube is arranged in the middle of the bottom end of the top fixing frame, and the bottom of the central tube is provided with the bottom fixing frame; according to the utility model, the components such as the first shearing impeller, the second shearing impeller, the seepage holes and the buffer cavity are added in the traditional planetary stirring equipment, so that the slurry at the bottom of the twist stirring blade can be sheared and stirred, the phenomenon that the use of a battery is affected by uneven slurry stirring is avoided, and meanwhile, the connecting shaft, the large gear, the small gear and the third shearing impeller are arranged at the bottom of the stirring barrel, so that the slurry at the bottom of the stirring barrel can be stirred in real time, and the precipitation at the bottom of the barrel is avoided.

With respect to the above description, the inventors consider that there are the following problems;

in the use process, the first motor is used for driving the twist stirring blade and the shearing impeller to rotate, so that the positive electrode slurry in the stirring barrel is uniformly mixed, and the positive electrode slurry contains a conductive agent, a binder and the like.

Disclosure of Invention

The utility model aims to provide a stirring device for producing positive electrode slurry, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a stirring device is used in production of anodal thick liquids, includes the churn, the top of churn is provided with the top cap, the bottom fixed mounting of churn has the supporting legs, the top fixed mounting of top cap has the inlet pipe, the bottom fixed mounting of churn has row material pipe, the inside of churn is provided with stirring mixing mechanism, the bottom of churn is provided with bottom stirring mechanism.

The bottom stirring mechanism comprises a driving component and a stirring component, and the driving component is arranged at the bottom of the stirring component.

The stirring and mixing mechanism comprises a driving motor, the driving motor is fixedly arranged at the top of the top cover, a stirring shaft is fixedly arranged at the output end of the driving motor, stirring blades are fixedly arranged outside the stirring shaft, a scraping plate is fixedly arranged at one end of each stirring blade, which is far away from the stirring shaft, so that positive electrode slurry is convenient to mix and stir, and meanwhile, the positive electrode slurry is prevented from being bonded on the inner wall of the stirring barrel.

Preferably, the drive assembly includes the mounting bracket, mounting bracket fixed mounting is in the bottom of churn, the bottom fixed mounting of mounting bracket has the biax motor, the output fixed mounting of biax motor has the dwang, the bottom fixed mounting of churn has the backup pad, the outside fixed mounting of dwang has the cam, is convenient for make biax motor drive cam rotate.

Preferably, the two rotating rods are arranged, and one end of each rotating rod, far away from the double-shaft motor, is rotatably arranged on the inner side of the supporting plate, so that the rotating rods are convenient to support and rotate.

Preferably, the stirring assembly comprises a sliding shaft, the sliding shaft is slidably mounted at the bottom of the stirring barrel, a stirring ring is fixedly mounted at the top of the sliding shaft, an arc block is fixedly mounted at one end, far away from the stirring ring, of the sliding shaft, a reset spring is fixedly mounted between the top of the arc block and the bottom of the stirring barrel, and the arc block can conveniently drive the stirring ring to reciprocate through the sliding shaft, so that positive slurry is prevented from being deposited at the bottom of the stirring barrel.

Preferably, through holes are formed in the positions, corresponding to the positions of the bottom of the stirring cylinder and the sliding shaft, of the stirring cylinder, and the sliding shaft is slidably mounted in the through holes, so that the sliding shaft can slide back and forth at the bottom of the stirring cylinder conveniently.

Preferably, the bottom of the arc-shaped block is provided with a groove, and the cam is contacted with the groove at the bottom of the arc-shaped block, so that the cam can conveniently drive the arc-shaped block to reciprocate.

Preferably, the through hole is formed in the position, corresponding to the stirring shaft, of the top cover, and the stirring shaft penetrates through the through hole, so that the stirring shaft penetrates through the top cover to rotate.

Preferably, the scraping plates are four, and the four scraping plates are in contact with the inner wall of the stirring cylinder, so that the scraping plates can scrape the positive electrode slurry adhered on the inner wall of the stirring cylinder conveniently.

Compared with the prior art, the utility model provides the stirring device for producing the anode slurry, which has the following beneficial effects:

1. this agitating unit is used in production of anodal thick liquids, through the bottom rabbling mechanism that sets up, in the use, drive the sliding shaft through the biax motor that sets up and carry out reciprocating motion, make the sliding shaft drive stirring ring and carry out reciprocating motion to make stirring ring upwards carry the thick liquids of churn bottom deposit, and then avoid anodal thick liquids to deposit downwards, improve the mixing effect of thick liquids.

2. This agitating unit is used in production of anodal thick liquids, through the stirring mixing mechanism that sets up, in the use, drive the (mixing) shaft through driving motor and rotate, make the stirring leaf mix the anodal thick liquids of churn inside, make the stirring leaf drive simultaneously and scrape the flitch and rotate along the inner wall of churn, make and scrape the granule that the flitch will bond on the churn inner wall and strike off to avoid anodal thick liquids bonding on the inner wall of churn, improve the mixing stirring effect of anodal thick liquids.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the description below are only some embodiments of the present utility model, 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 view of the appearance structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the front structure of the present utility model;

FIG. 3 is a schematic view showing the appearance of the bottom stirring mechanism according to the present utility model;

FIG. 4 is a schematic view of the external structure of the stirring and mixing mechanism of the present utility model.

In the figure: 1. a stirring cylinder; 2. a top cover; 3. supporting feet; 4. a feed pipe; 5. a discharge pipe; 6. a stirring and mixing mechanism; 61. a driving motor; 62. a stirring shaft; 63. stirring the leaves; 64. a scraping plate; 7. a bottom agitation mechanism; 71. a drive assembly; 711. a mounting frame; 712. a biaxial motor; 713. a rotating lever; 714. a support plate; 715. a cam; 72. an agitation assembly; 721. a sliding shaft; 722. a stirring ring; 723. an arc-shaped block; 724. and a return spring.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiment one:

referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a stirring device is used in production of anodal thick liquids, includes churn 1, and the top of churn 1 is provided with top cap 2, and the bottom fixed mounting of churn 1 has supporting legs 3, and the top fixed mounting of top cap 2 has inlet pipe 4, and the bottom fixed mounting of churn 1 has row material pipe 5, and the inside of churn 1 is provided with stirring mixing mechanism 6, and the bottom of churn 1 is provided with bottom stirring mechanism 7.

The bottom agitation mechanism 7 includes a driving assembly 71 and an agitation assembly 72, and the driving assembly 71 is disposed at the bottom of the agitation assembly 72.

Further, the driving assembly 71 includes a mounting frame 711, the mounting frame 711 is fixedly mounted at the bottom of the mixing drum 1, the bottom of the mounting frame 711 is fixedly mounted with a double-shaft motor 712, the output end of the double-shaft motor 712 is fixedly mounted with a rotating rod 713, the bottom of the mixing drum 1 is fixedly mounted with a supporting plate 714, and the outer part of the rotating rod 713 is fixedly mounted with a cam 715, so that the double-shaft motor 712 can drive the cam 715 to rotate.

Further, two rotation rods 713 are provided, and one end of the rotation rod 713 away from the biaxial motor 712 is rotatably installed at the inner side of the support plate 714, so that the rotation rod 713 is supported for rotation.

Further, the stirring assembly 72 includes a sliding shaft 721, the sliding shaft 721 is slidably mounted at the bottom of the stirring barrel 1, a stirring ring 722 is fixedly mounted at the top of the sliding shaft 721, an arc block 723 is fixedly mounted at one end of the sliding shaft 721 away from the stirring ring 722, and a return spring 724 is fixedly mounted between the top of the arc block 723 and the bottom of the stirring barrel 1, so that the arc block 723 can drive the stirring ring 722 to reciprocate through the sliding shaft 721, and the positive electrode slurry is prevented from being deposited at the bottom of the stirring barrel 1.

Further, through holes are formed at the bottom of the mixing drum 1 at positions corresponding to the sliding shafts 721, and the sliding shafts 721 are slidably mounted in the through holes so that the sliding shafts 721 reciprocally slide at the bottom of the mixing drum 1.

Further, a groove is formed at the bottom of the arc-shaped block 723, and the cam 715 is in contact with the groove at the bottom of the arc-shaped block 723, so that the cam 715 drives the arc-shaped block 723 to reciprocate.

Embodiment two:

referring to fig. 4, and in combination with the first embodiment, further obtaining, the stirring and mixing mechanism 6 includes a driving motor 61, the driving motor 61 is fixedly installed at the top of the top cover 2, a stirring shaft 62 is fixedly installed at the output end of the driving motor 61, a stirring blade 63 is fixedly installed at the outer part of the stirring shaft 62, a scraping plate 64 is fixedly installed at one end of the stirring blade 63 away from the stirring shaft 62, so as to facilitate mixing and stirring of the positive electrode slurry, and meanwhile, the positive electrode slurry is prevented from being adhered on the inner wall of the stirring cylinder 1.

Further, through holes are formed in the positions, corresponding to the positions of the top cover 2 and the stirring shaft 62, of the stirring shaft 62, and the stirring shaft 62 penetrates through the through holes, so that the stirring shaft 62 can conveniently penetrate through the top cover 2 to rotate.

Further, four scraping plates 64 are provided, and the four scraping plates 64 are in contact with the inner wall of the stirring cylinder 1, so that the scraping plates 64 scrape off the positive electrode slurry adhered on the inner wall of the stirring cylinder 1.

In the actual operation process, when the device is used, positive electrode slurry is discharged into the stirring cylinder 1 through the feed pipe 4, the stirring shaft 62 is driven to rotate through the driving motor 61, the stirring shaft 62 drives the stirring blade 63 to rotate, the stirring blade 63 mixes and stirs the positive electrode slurry, and meanwhile, the stirring blade 63 drives the scraping plate 64 to rotate along the inner wall of the stirring cylinder 1, so that the scraping plate 64 scrapes the slurry adhered on the inner wall of the stirring cylinder 1;

the rotating rod 713 is driven to rotate by the double-shaft motor 712, the rotating rod 713 drives the cam 715 to rotate, the cam 715 drives the arc-shaped block 723 to slide in a reciprocating manner, the arc-shaped block 723 drives the stirring ring 722 to reciprocate by the sliding shaft 721, the stirring ring 722 stirs the slurry deposited at the bottom of the stirring cylinder 1 upwards, and therefore the deposition of the positive electrode slurry at the bottom of the stirring cylinder 1 is avoided.

The positive electrode slurry comprises a high-nickel ternary material, a positive electrode material, a binder, a conductive agent, an additive, a dispersing agent and other materials;

the molecular formula of the high-nickel ternary material is LiNixCoyMzO2, wherein x+y+z=1, x is greater than 0.6, M is selected from Mn or Al, and the content of residual alkali (LiOH) on the surface is 100-5000 ppm.

Wherein the positive electrode material comprises one or more of a low-nickel ternary material, a medium-nickel ternary material, lithium manganate and lithium cobaltate;

the binder comprises polyvinylidene fluoride;

the conductive agent comprises at least one of carbon black, ketjen black, conductive graphite, carbon nano tube and graphene;

the additive comprises at least one of boric acid, oxalic acid and citric acid.

The dispersant comprises N-methyl pyrrolidone;

the mass ratio of the high nickel ternary material, the positive electrode material, the binder and the conductive agent in the positive electrode slurry is (5.0-90): (5-90): 0.5-5.0;

the mass ratio of the high-nickel ternary material to the additive is 1: (0.005-0.03);

the solid content of the positive electrode slurry is 50-75%.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims

1. Stirring device for producing positive electrode slurry, comprising a stirring cylinder (1), and being characterized in that: the stirring device is characterized in that a top cover (2) is arranged at the top of the stirring barrel (1), supporting feet (3) are fixedly arranged at the bottom of the stirring barrel (1), a feeding pipe (4) is fixedly arranged at the top of the top cover (2), a discharging pipe (5) is fixedly arranged at the bottom of the stirring barrel (1), a stirring and mixing mechanism (6) is arranged in the stirring barrel (1), and a bottom stirring mechanism (7) is arranged at the bottom of the stirring barrel (1);

the bottom stirring mechanism (7) comprises a driving component (71) and a stirring component (72), wherein the driving component (71) is arranged at the bottom of the stirring component (72);

stirring mixing mechanism (6) are including driving motor (61), driving motor (61) fixed mounting is at the top of top cap (2), the output fixed mounting of driving motor (61) has (mixing) shaft (62), the outside fixed mounting of (mixing) shaft (62) has stirring leaf (63), the one end fixed mounting that stirring leaf (63) kept away from (mixing) shaft (62) has scraper (64).

2. The stirring device for producing positive electrode slurry according to claim 1, wherein: the driving assembly (71) comprises a mounting frame (711), the mounting frame (711) is fixedly arranged at the bottom of the stirring barrel (1), a double-shaft motor (712) is fixedly arranged at the bottom of the mounting frame (711), a rotating rod (713) is fixedly arranged at the output end of the double-shaft motor (712), a supporting plate (714) is fixedly arranged at the bottom of the stirring barrel (1), and a cam (715) is fixedly arranged outside the rotating rod (713).

3. The stirring device for producing positive electrode slurry according to claim 2, wherein: the rotating rods (713) are arranged in two, and one end, far away from the double-shaft motor (712), of each rotating rod (713) is rotatably arranged on the inner side of the supporting plate (714).

4. The stirring device for producing positive electrode slurry according to claim 2, wherein: the stirring assembly (72) comprises a sliding shaft (721), the sliding shaft (721) is slidably mounted at the bottom of the stirring barrel (1), a stirring ring (722) is fixedly mounted at the top of the sliding shaft (721), an arc-shaped block (723) is fixedly mounted at one end, far away from the stirring ring (722), of the sliding shaft (721), and a reset spring (724) is fixedly mounted between the top of the arc-shaped block (723) and the bottom of the stirring barrel (1).

5. The stirring device for producing positive electrode slurry according to claim 4, wherein: through holes are formed in the positions, corresponding to the sliding shafts (721), of the bottoms of the stirring cylinders (1), and the sliding shafts (721) are slidably installed in the through holes.

6. The stirring device for producing positive electrode slurry according to claim 4, wherein: the bottom of the arc-shaped block (723) is provided with a groove, and the cam (715) is contacted with the groove at the bottom of the arc-shaped block (723).

7. The stirring device for producing positive electrode slurry according to claim 1, wherein: through holes are formed in the positions, corresponding to the stirring shafts (62), of the top cover (2), and the stirring shafts (62) penetrate through the through holes.

8. The stirring device for producing positive electrode slurry according to claim 1, wherein: four scraping plates (64) are arranged, and the four scraping plates (64) are in contact with the inner wall of the stirring cylinder (1).