CN116966817A - A uniform feeding device and battery slurry production line - Google Patents

Abstract

The invention discloses a uniform blanking device and a battery slurry production line, and relates to the technical field of battery slurry, and the uniform blanking device comprises a bin, a material pipe and a driving mechanism, wherein the bin is provided with a containing cavity, a bridge breaking assembly is arranged in the bin and comprises a base, a driving plate and a pulling plate, the base is arranged in the containing cavity, the driving plate is arranged on the base, the pulling plate is arranged on one side of the driving plate, which faces to an outlet of the containing cavity, and the base can be driven by the driving mechanism to rotate around an axis of the base; the base is provided with a first unloading hole, the bottom wall of the storage bin is provided with a second unloading hole, the base can rotate to the position where the first unloading hole is communicated with the second unloading hole, and the material pipe is communicated with the second unloading hole. According to the invention, the poking plate is matched with the driving plate, so that bridging and bonding of slurry and powder can be well avoided by the bridge breaking assembly, the slurry and the powder can fall uniformly and quantitatively through the discharging hole by the driving plate, the uniformity of discharging is improved, and the discharging precision is higher.

Description

Uniform discharging device and battery slurry production line

Technical Field

The invention relates to the technical field of battery slurry, in particular to a uniform blanking device and a battery slurry production line.

Background

The production of the lithium battery comprises a pole piece manufacturing process, a battery assembling process, a liquid injection process, a pre-charging process, a formation process and an aging process. In the pole piece manufacturing process stage, the pole piece manufacturing method can be divided into five processes of slurry preparation, slurry coating, pole piece rolling, pole piece slitting and pole piece drying. In the stage of the battery assembly process, the battery can be divided into winding, shell entering and welding according to different specifications and models of the battery. The liquid injection stage comprises liquid injection, air exhaust, sealing, pre-filling, formation and aging. The pole piece manufacturing process is the core content of the whole lithium battery manufacturing, and relates to the electrochemical performance of the battery, wherein the quality of the sizing agent is particularly important.

When the battery slurry is prepared, the prior art needs to adopt an air hammer or a pneumatic vibrator to vibrate and cooperate with an air disc to generate air flow for discharging, and weighing and metering are performed through a metering screw, however, the discharging precision of the discharging mode is poor, and the prior art is difficult to meet the requirements on occasions with high discharging precision requirements.

Disclosure of Invention

The present invention aims to solve one of the technical problems in the related art to a certain extent. Therefore, the invention provides a uniform blanking device and a battery slurry production line, and has the advantage of high blanking precision.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a uniform blanking device, includes feed bin, material pipe and actuating mechanism, the feed bin is formed with and holds the chamber, be provided with broken bridge module in the feed bin, broken bridge module includes base, driver plate and plectrum, the base set up in hold the intracavity, the driver plate sets up on the base, the plectrum sets up the driver plate is in towards one side of holding the export in chamber, the base can be driven by actuating mechanism and rotate around self axis; the base is provided with a first unloading hole, the bottom wall of the storage bin is provided with a second unloading hole, the base can rotate to a position where the first unloading hole is communicated with the second unloading hole, and the material pipe is communicated with the second unloading hole.

The method has the following beneficial effects: utilize plectrum and driver plate cooperation, broken bridge subassembly can avoid bridging, the bonding of thick liquids and powder well, and the driver plate makes thick liquids and powder can be quantitatively through the even whereabouts of unloading hole for the degree of consistency of unloading promotes, and the unloading precision is higher.

Optionally, the uniform blanking device comprises four bridge breaking assemblies. The quantity of broken bridge components is relevant with broken bridge efficiency, and when the speed of feed bin is faster, broken bridge components's quantity is more can alleviate the burden of single broken bridge components, promotes the holistic reliability of equipment.

Optionally, the dial and the dial are formed as an integral structure. The plectrum and plectrum integration set up, can promote the stability of plectrum and driver plate, can also reduce installation cost for broken bridge module's synchronous operation is more simple and convenient.

Optionally, the bridge breaking assemblies are arranged in a central symmetry manner with respect to the center of the base.

Optionally, the uniform blanking device further comprises a metering screw rod, and the metering screw rod is provided with a through hole communicated with the material pipe.

Optionally, the metering screw comprises a screw body, a pressure mechanism, a screw driving mechanism and a blanking mechanism, wherein the pressure mechanism is communicated with the screw body and can enable the metering screw to have positive pressure relative to the material pipe; the screw body comprises a screw and a lining cylinder, and the screw is attached to the inner wall of the lining cylinder; the screw driving mechanism can drive the screw to rotate around the axis of the screw driving mechanism; the blanking mechanism is arranged at one end of the screw body, and the blanking mechanism can control the falling of slurry in the screw body.

Optionally, the pressure mechanism comprises a pneumatic butterfly valve, and the screw drive mechanism comprises a screw drive motor.

Optionally, the uniform blanking device further comprises a driving mechanism, wherein the driving mechanism is arranged below the bin and is used for driving the bin to rotate around the axis of the bin.

Optionally, the driving mechanism includes a dust cover, and the dust cover is disposed at a connection position between the driving mechanism and the bin. The dust cover is arranged, so that the connection part of the driving mechanism and the storage bin is not affected by slurry, and the reliability is higher.

In addition, the invention also provides a battery slurry production line, and the battery slurry device comprises the uniform blanking device. The battery slurry device provided by the invention is similar to the above-mentioned even blanking device in the beneficial effect reasoning process, and will not be described again here.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings. The best mode or means of the present invention will be described in detail with reference to the accompanying drawings, but is not limited to the technical scheme of the present invention. In addition, these features, elements, and components are shown in plural in each of the following and drawings, and are labeled with different symbols or numerals for convenience of description, but each denote a component of the same or similar construction or function.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a front view of a uniform blanking device in an embodiment of the present invention with side walls and bottom walls of a bin removed;

FIG. 2 is a cross-sectional view of a uniform blanking device in an embodiment of the present invention;

FIG. 3 is a top view of a uniform blanking device without a bin and a tube in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a structure of a uniform blanking device for removing the bottom wall and the side wall of a bin in an embodiment of the invention;

fig. 5 is a top view of a uniform blanking device in an embodiment of the present invention.

Wherein, 1. A stock bin; 11. a first discharge hole; 12. a pulling piece; 13. a dial; 14. a support flange; 15. a base; 2. a material pipe; 3. a metering screw; 31. a screw body; 32. a pressure mechanism; 33. a screw drive mechanism; 34. a blanking mechanism; 4. a driving mechanism.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples in the embodiments are intended to illustrate the present invention and are not to be construed as limiting the present invention.

Reference in the specification to "one embodiment" or "an example" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

Examples:

the embodiment provides a uniform blanking device, which is a part of a battery slurry production line. And a bag opening station is arranged at the upstream of the uniform blanking device. And a stirrer is arranged at the downstream of the uniform discharging device. The production of battery paste is a complex and delicate task. The battery paste of a lithium battery is one type of fluid, and the fluid can be generally classified into a newtonian fluid and a non-newtonian fluid. The non-Newtonian fluid can be further classified into a dilatant fluid, a chronotropic non-Newtonian fluid, a pseudoplastic fluid and a bingham fluid. Newtonian fluids refer to low viscosity fluids that deform easily upon application of a force, and the shear stress is proportional to the rate of deformation. The shear stress at any point is a linear function of the shear deformation rate. Non-newtonian fluids refer to fluids that do not satisfy newtonian viscosity laws of experiment, i.e., fluids whose shear stress and shear strain rate are not linear. Concentrated solutions and suspensions of high molecular weight polymers are typically non-newtonian fluids. The battery slurry is composed of a plurality of raw materials with different specific gravities and different granularities, and is formed by mixing and dispersing solid and liquid phases, and the formed slurry belongs to non-Newtonian fluid. The lithium battery slurry can be divided into positive electrode slurry and negative electrode slurry. The parameters affecting the properties of the slurry are viscosity. Viscosity is a measure of the viscosity of a fluid and is an indication of the fluid flow force versus its internal friction phenomena. The property of a liquid that generates internal friction between its molecules when flowing is called the viscosity of the liquid. The magnitude of viscosity, expressed as viscosity, is a resistance factor used to characterize the properties of a liquid. The viscosity is in turn divided into dynamic viscosity and conditional viscosity.

The slurry is a non-Newtonian fluid and is a solid-liquid mixed fluid, and in order to meet the requirements of the subsequent coating process, the slurry needs to have the following characteristics: firstly, the fluidity can be realized by stirring the slurry to naturally flow down, and the continuity is observed to be good, so that the fluidity is good, and the fluidity is related to the solid content and the viscosity of the slurry; secondly, leveling property of the slurry influences the evenness and uniformity of coating; thirdly, rheological property refers to deformation characteristics of slurry in flowing, and the quality of the slurry influences the quality of the pole piece. The slurry is typically prepared through the following stages: mixing the dry powder, and contacting the particles in a dot-by-dot manner, a dot-by-plane manner and a dot-by-dot manner; a semi-dry mud kneading stage, wherein after the dry powder is uniformly mixed, binder liquid or solvent is added, powder is wetted to form mud, the materials are sheared and rubbed by mechanical force through strong stirring of a stirrer, meanwhile, internal friction exists among particles, and under each acting force, the raw material particles tend to be highly dispersed, so that the particle size and viscosity of the finished slurry are greatly influenced; and in the diluting and dispersing stage, after kneading, slowly adding a solvent to adjust the viscosity and solid content of the slurry, wherein the dispersing and agglomerating coexist in the stage, and finally, the stability is achieved, and the dispersion of the materials in the stage is mainly influenced by mechanical force, frictional resistance between powder and liquid, high-speed dispersion shearing force and impact interaction force between the slurry and a container wall.

The slurry after slurry mixing needs to have better stability, which is an important index for ensuring the consistency of batteries in the battery production process. Along with the completion of slurry mixing, stirring is stopped, and slurry can be subjected to sedimentation, flocculation, agglomeration and the like, so that large particles are generated, and the subsequent coating and other processes can be greatly influenced. The main parameters for characterizing the stability of the slurry are flowability, viscosity, solid content, density and the like.

The battery paste needs to have a stable and proper viscosity, which has a critical influence on the electrode sheet coating process. The coating of the pole piece is not facilitated due to the fact that the viscosity is too high or too low, the slurry with high viscosity is not easy to precipitate, and the dispersibility is good. However, too high a viscosity is disadvantageous for leveling effects and for coating. When the viscosity is too low, although the fluidity of the slurry is good, drying is difficult, the drying efficiency of coating is reduced, and problems such as cracking of the coating, agglomeration of slurry particles, poor consistency of surface density and the like can also occur.

After the slurry is mixed, the particle size of the battery slurry needs to be measured, and a scraping method is generally adopted for the particle size measurement. Particle size is an important parameter characterizing the quality of the slurry, and the particle size has an important effect on the coating process, the rolling process and the battery performance, in theory, the smaller the slurry particle size, the better. When the particle diameter is too large, the stability of the slurry is affected, sedimentation occurs, the consistency of the slurry is poor, and the like. In the extrusion coating process, the conditions of blocking, pitting after the pole piece is dried and the like can occur, so that the quality problem of the pole piece is caused. In the subsequent rolling process, the poor coating position is easy to cause pole piece fracture and local microcrack due to uneven stress, and the cycle performance, the multiplying power performance and the safety performance of the battery are greatly damaged. The main materials such as anode active substances, adhesives, conductive agents and the like have different particle sizes and different densities, and various different contact modes such as mixing, extrusion, friction, agglomeration and the like can occur in the stirring process. In the stages of gradual mixing of raw materials, wetting by solvent, breaking of large materials and gradual stabilization, the conditions of uneven material mixing, poor dissolution of adhesive, serious agglomeration of fine particles, change of adhesive properties and the like can occur, and large particles can be generated. The solid content of the slurry is closely related to the stability of the slurry, and the higher the solid content of the slurry is, the higher the viscosity is, and vice versa in the same process and formula. Within a certain range, the higher the viscosity, the higher the slurry stability. The solids content has a certain influence on the improvement of stirring efficiency and coating efficiency. The higher the solid content, the shorter the slurry stirring time, the less solvent is consumed, the higher the coating drying efficiency and the time is saved. The high-solid-content slurry can reduce the thickness between the coatings and reduce the internal resistance of the battery. The density of the slurry is an important parameter for the consistency of the reaction slurry, and the dispersion effect of the slurry can be verified by testing the slurry densities at different positions.

From the above, the production of the battery slurry is very important for the proportion of each component, and the accuracy of the proportion has a great influence on the final performance of the battery slurry. In order to improve the material proportioning precision in the battery slurry. The embodiment provides a uniform blanking device. As shown in fig. 1 and 2, the uniform blanking device provided in this embodiment includes a bin 1, a material pipe 2, a metering screw 3, and a bin driving mechanism 4. The silo 1 has a receiving cavity for adding battery paste and powder. The "material" in the uniform discharging device in this embodiment refers to the powder material, and since the powder material is a solid material in the battery slurry preparation process, which is a part of the slurry, and the powder material has properties similar to those of the slurry, the slurry is still used in the subsequent discussion instead of the powder material. After the slurry enters the storage bin 1, the slurry enters the material pipe 2 through the discharging hole on the storage bin 1 and enters the metering screw 3 through the material pipe 2 under the action of gravity and the slurry around the slurry. The metering screw 3 conveys the slurry to a subsequent material application device. In this embodiment, the material handling device is a blender. Since the slurry needs to be circulated in the feeding bin 1 and the uniform discharging device by gravity, the feeding bin 1 needs to be disposed above the material pipe 2, and the material pipe 2 needs to be disposed above the metering screw 3.

After the slurry is thrown into the feed bin 1, the slurry enters the material pipe 2 through a discharge hole at the bottom of the feed bin 1. The material pipe 2 is a conveying mechanism for conveying slurry in the uniform blanking device. The metering screw 3 is a quantitative number device, which in the present embodiment includes a screw body 31, a pressure mechanism 32, a screw driving mechanism 33, and a blanking mechanism 34. Specifically, the pressure mechanism 32 includes a pneumatic butterfly valve, and the screw drive mechanism 33 includes a screw drive motor. The pneumatic butterfly valve and the screw driving motor are connected with the screw body 31 through a section of pipeline and a flange ring. The pressure mechanism 32 is used to maintain and control the air pressure in the metering screw 3. Mainly to keep the air pressure balance between the metering screw 3 and the stock bin. The screw driving mechanism 33 is used to drive the metering screw 3 to rotate or stop. The screw body 31 includes a screw and a bushing, and the screw and an inner wall of the bushing are closely fitted, so that one or more sealed spaces are formed. The blanking mechanism 34 includes a blanking valve. Along with the intermittent unidirectional rotation of the metering screw 3, the slurry in the sealed space can be driven to the position of the blanking valve. If the blanking valve is opened, the slurry can be discharged. If the blanking valve is closed, the slurry will stay at the blanking valve. It will be appreciated that the metering screw 3 has a through hole communicating with the feed pipe 2.

The metering of the slurry by the metering screw 3 is not by weighing or the like, but is achieved by means of a screw feeder, i.e. by means of the volume metered by means of the cavity seats of the screw channel of the screw body. In each sub-packaging cycle, the rotating speed of the screw is controlled, so that the physical quantity transmitted by the screw in each rotation can be controlled, and the purpose of metering is achieved. The metering screw is in the form of a mechanical type, an electromagnetic clutch control type and a stepping motor driving type. The present embodiment is not limited to the specific form of the metering screw.

Control of the metering screw 3 itself is easier to achieve, but accurate measurement of the material by the metering screw 3 is required on a material uniform basis. I.e. the amount of material entering the metering screw 3 should be controllable. However, since the slurry is not completely uniform, the amount of slurry metered by the metering screw 2 is also related to the discharge of the slurry. The blanking quantity of the sizing agent is related to the blanking speed and the blanking time. Specifically, the feeding quantity of the slurry is the product of the feeding speed and the time. The single blanking time can be accurately controlled by adjusting the rotation time of the metering screw 3. But the speed of the discharge may vary due to the viscosity of the slurry. For example, when the slurry is low in humidity, poor in viscosity and poor in fluidity, bridging problems such as mouseholes and sticking walls are liable to occur. The amount of blanking in the cross section is incomplete and cannot be measured at a simple constant speed. When the fluidity of the slurry is good, the metering out-of-tolerance is easy to generate, so that the blanking speed cannot be accurately measured.

Thus, two improvements are conceivable to improve the accuracy of the measurement of the blanking speed. The first solution is to increase the detection capability so that even if there are rat holes, bubbles in the slurry, accurate measurement is possible. However, this approach is difficult, costly, and unstable.

The second scheme is that uniformity of slurry in blanking is improved. Specifically, the slurry needs to be broken. The bridging phenomenon is that powder or slurry is accumulated in the bin 1, so that the section of the discharge opening of the bin 1, through which the slurry can flow, is reduced, arch plugs are caused, the discharge continuity of the bin 1 is affected, and the discharge is difficult and even is interrupted when serious. In order to overcome bridging, the mechanical structure of the bin 1 is designed correctly, and the inclination angle of the cone part of the bin 1 is increased so that the inclination angle is larger than the friction angle between the slurry and the inner wall of the bin. But increasing the inclination will increase the height of the silo 1 or decrease the capacity of the silo 1. The inventors have verified many times that when the inclination is between 55 and 65 degrees, a suitable silo capacity can be obtained and bridging is prevented to some extent. The smoothness of the inner wall of the storage bin 1 can be improved, and friction is reduced. The inner wall of the storage bin 1 can be polished, friction of the inner wall of the storage bin 1 is reduced, and bridging is reduced.

In addition, there is also a pneumatic bridge breaking method in which the balance of the arch plugs is broken by the impact of compressed air to break the bridge. Common devices are pneumatic nozzles, air bearing discs and air cannons. However, in the case of liquid slurries, the pneumatic bridge-breaking method may cause bubbles to enter the slurry, resulting in uneven blanking. In addition, there is also a vibration bridge-breaking method, and the friction coefficient between the slurries is reduced and the shear strength is lowered by vibration. Common devices are gas vibrators, air hammers. However, the gas vibrator and air hammer do not make the slurry fed into the pipe more uniform per unit time, and the problem of bubbles and mouseholes cannot be improved. And, hardening of the slurry with less humidity may also occur. In addition, there is a mechanical bridge breaking method, the basic principle of which is that the cohesive force of thick slurry is overcome by the forced movement of machinery at the bridging position of the slurry, and the balance of the arch plug is destroyed. The method is the bridge breaking method with the best bridge breaking effect in the prior bridge breaking methods. In this embodiment, a mechanical bridge breaking method is adopted.

As shown in fig. 2, 4 and 5, specifically, the present embodiment is provided with a bridge breaking assembly in the silo 1, and the bridge breaking assembly includes a base 15, a dial 13 and a dial piece 12. The base 15 is matched with the bottom wall of the bin 1 in size, the driving plate 13 extends upwards from the base 15, and the driving plate 12 is arranged on the driving plate 13. In the present embodiment, the dial 13 is integrally formed with the dial 12 for manufacturing and mounting. In other embodiments, the dial 13 and the paddle 12 may be mounted separately. The plectrum 12 is laminated with the inside wall of feed bin 1, and it can follow inside wall and remove. It will be appreciated that the paddles 12 may be located only nearer to the inner side wall of the magazine 1 than to fit it. The dial 13 extends obliquely upward, so that slurry is unlikely to stay on the dial, and is less impacted by the slurry when rotating compared with a vertical or horizontal dial, so that the stability of the dial 13 is better. The base 15 further has a first discharge hole 11 penetrating the base 15 in the thickness direction of the base 15. The bottom wall of the storage bin 1 is provided with a second discharging hole. The bridge breaker assembly is rotatable relative to the silo 1 such that slurry can fall from the silo into the pipe 2 only when the bridge breaker assembly is rotated to the point where the first discharge opening 11 communicates with the second discharge opening.

The bottom wall of the silo extends towards its radially outer edge and is connected to a support flange 14, which provides a sealing connection between the silo 1 and the pipe.

A driving mechanism 4 is arranged below the storage bin 1, and the driving mechanism 4 can drive the bridge breaking assembly to rotate around the axis of the bridge breaking assembly so as to perform material stirring and bridge breaking. At the junction of the drive mechanism 4 and the bridge breaking assembly, a dust cover 41 is also provided, which is determined by the particular working environment in the silo 1, in which silo 1 there is a large amount of dust or a large amount of liquid slurry. In order to prevent the drive mechanism 4 from being clogged, a dust cover 41 needs to be provided. The present embodiment is not limited to the specific form of the driving mechanism, and it may be a digitally controlled gear motor.

In this embodiment, broken bridge assembly is provided with four, and broken bridge assembly's quantity is correlated with broken bridge's efficiency, and when broken bridge assembly's speed was very fast, broken bridge assembly's quantity increased can alleviate the burden of single broken bridge assembly, promotes the holistic reliability of equipment.

In broken bridge subassembly, with plectrum 12 and 13 integrated designs of driver plate, can make thick liquids can be dialled into material pipe 2 by driver plate 13 after broken bridge, prevent to stay too long, cause the secondary bridging, be favorable to promoting efficiency. The driver plate 13 is arranged above the first discharging hole 11, and can provide buffering, so that slurry can not directly fall into the material pipe 2, and accordingly uncontrolled abrupt discharging can not occur during discharging, and the discharging uniformity is improved. The setting of broken bridge subassembly can solve the thick liquids bridging in feed bin 1, can't the problem of unloading, avoids carrying out artifical striking, dismantlement because of the bridging. The automation degree of the equipment can be improved, and the production efficiency of the machine is improved. And, can play the effect of dialling the thick liquids that looses, avoid thick liquids monoblock to drop, can comparatively fall into metering screw 3 uniformly, guarantee that thick liquids unloading is even for the measurement precision is higher.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that the present invention includes but is not limited to the accompanying drawings and the description of the above specific embodiment. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.

Claims (10)

1. A uniform feeding device, including a silo (1), a material tube (2) and a driving mechanism (4). The silo (1) is formed with a receiving cavity, and is characterized by: The silo (1) is provided with a bridge-breaking assembly. The bridge-breaking assembly includes a base (15), a dial (13) and a paddle (12). The base (15) is arranged in the accommodation cavity. , the dial (13) is provided on the base (15), the paddle (12) is provided on the side of the dial (13) facing the outlet of the accommodation cavity, the base (15 ) can be driven by the driving mechanism (4) to rotate around its own axis; A first discharge hole (11) is formed on the base (15), and a second discharge hole is formed on the bottom wall of the bin. The base (15) can be rotated to the first discharge hole. (11) The position connected to the second discharge hole, and the material pipe (2) is connected to the second discharge hole. 2. The uniform feeding device according to claim 1, characterized in that the uniform feeding device includes four bridge-breaking assemblies. 3. The uniform feeding device according to claim 1, characterized in that the paddle (12) and the dial (13) are formed into an integrated structure. 4. The uniform feeding device according to claim 1, characterized in that a plurality of the dials (13) are arranged centrally symmetrically with respect to the center of the base. 5. The uniform feeding device according to claim 1, characterized in that the uniform feeding device further includes a metering screw (3), and the metering screw (3) has a connecting rod connected with the material tube (2). through hole. 6. The uniform feeding device according to claim 5, characterized in that the metering screw (3) includes a screw body (31), a pressure mechanism (32), a screw driving mechanism (33) and a blanking mechanism (34). ), the pressure mechanism (32) is connected with the screw body (31), enabling the metering screw (3) to have a positive pressure relative to the material tube (2); the screw body (31) includes a screw and the liner, the screw and the inner wall of the liner fit together; the screw driving mechanism (33) can drive the screw to rotate around its own axis; the blanking mechanism (34) is provided on the screw body (31) At one end of the screw body (31), the dropping mechanism (34) can control the falling of the slurry in the screw body (31). 7. The uniform feeding device according to claim 6, characterized in that the pressure mechanism (32) includes a pneumatic butterfly valve, and the screw driving mechanism includes a screw driving motor. 8. The uniform feeding device according to claim 1, characterized in that the uniform feeding device further includes a driving mechanism (4), and the driving mechanism (4) is arranged below the silo (1) , the driving mechanism (4) is used to drive the silo to rotate around the axis of the silo (1). 9. The uniform feeding device according to claim 8, characterized in that the driving mechanism (4) includes a dust cover (41), and the dust cover (41) is arranged on the driving mechanism (4). The connection with the silo (1). 10. A battery slurry production line, including the uniform feeding device as claimed in any one of claims 1 to 9, further comprising a bag opening station located upstream of the uniform feeding device and a bag opening station downstream of the uniform feeding device. Blender.