CN215996473U

CN215996473U - Mixing device and battery slurry manufacturing system

Info

Publication number: CN215996473U
Application number: CN202121338759.2U
Authority: CN
Inventors: 邓忠德; 柏瑾; 刘超; 吴志亮; 贺梦江
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-03-11
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a mixing device and a manufacturing system of battery slurry, wherein the mixing device comprises a mixing tank, an impeller, a baffle plate assembly, a dispersing tooth group and a first driving piece, and the mixing tank is limited with an accommodating cavity; the impeller is arranged in the accommodating cavity; the baffle plate assembly comprises a fixed baffle plate and a rotating baffle plate, and the fixed baffle plate and the rotating baffle plate are sequentially arranged in a staggered manner along the radial direction of the accommodating cavity, wherein the fixed baffle plate and the rotating baffle plate enable the accommodating cavity to form a mixing cavity and a dispersing gap from inside to outside; the dispersing tooth group comprises first dispersing teeth which are fixedly connected with the rotating baffle; and/or the dispersing tooth group comprises a plurality of second dispersing teeth which are fixedly connected with the fixed baffle; and the first driving part is connected with the impeller and used for driving the impeller to rotate, and the first driving part is connected with the rotating baffle and used for driving the rotating baffle to rotate. By adopting the scheme, the stirring of the battery slurry is ensured, and the dispersion of the battery slurry is also ensured.

Description

Mixing device and battery slurry manufacturing system

Technical Field

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

Background

Batteries are used as energy supply devices commonly adopted in the field of various electronic products, and the development and the demand of the batteries in the fields of electric vehicles, energy storage and the like are rapidly increased.

In the process of manufacturing the battery, battery processing procedures such as battery slurry stirring and coating are needed, and the existing battery slurry stirring equipment cannot simultaneously stir and disperse the battery materials.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a mixing device which can stir and disperse battery materials.

The utility model also provides a manufacturing system of the battery slurry with the mixing equipment.

A mixing apparatus according to an embodiment of the present invention includes:

a mixing tank defining an accommodating chamber;

the impeller is arranged in the accommodating cavity;

the baffle plate assembly comprises at least one annular fixed baffle plate and at least one annular rotating baffle plate, the fixed baffle plate and the rotating baffle plate are sequentially arranged in a staggered manner from inside to outside along the radial direction of the accommodating cavity, the central axes of the fixed baffle plate and the rotating baffle plate are overlapped with the central axis of the accommodating cavity, the fixed baffle plate and the rotating baffle plate enable the accommodating cavity to form a mixing cavity and a dispersing gap between the fixed baffle plate and the rotating baffle plate from inside to outside, the impeller is positioned in the mixing cavity, the side parts of the dispersing gap close to and far away from the impeller are provided with feeding ports, and the feeding ports are communicated with the dispersing gap and the mixing cavity, or the feeding ports are communicated with different dispersing gaps and are communicated with the dispersing gap and the mixing cavity;

the dispersing tooth group comprises a plurality of first dispersing teeth, and the first dispersing teeth are fixedly connected to the rotating baffle and used for shearing and dispersing the battery materials in the dispersing gaps; and/or the dispersing tooth group comprises a plurality of second dispersing teeth which are fixedly connected to the fixed baffle and used for shearing and dispersing the battery materials in the dispersing gaps; and a process for the preparation of a coating,

the first driving piece is connected with the impeller and used for driving the impeller to rotate, and the first driving piece is connected with the rotating baffle and used for driving the rotating baffle to rotate.

The mixing device provided by the embodiment of the utility model has at least the following beneficial effects: the battery material adds the hybrid chamber, and first driving piece drive impeller rotates, and the impeller stirs battery material and battery solvent to make preliminary battery thick liquids. In the process of stirring the battery slurry, the stirring paddle generates centrifugal force outwards on the battery slurry, and the battery slurry enters the dispersing gap from the feeding hole, namely between the rotating baffle and the fixed baffle. The first driving piece drives the rotating baffle to rotate, the gap between the rotating baffle and the fixed baffle is small, the rotating baffle drives the battery slurry to move circumferentially, at the moment, the first dispersing teeth disperse and shear the battery slurry in the dispersing gap, or the second dispersing teeth disperse and shear the battery slurry in the dispersing gap, or the first dispersing teeth and the second dispersing teeth disperse and shear the battery slurry in the dispersing gap, and the required battery slurry is further manufactured. It should be noted that a plurality of dispersion gaps can be continuously arranged along the radial direction of the accommodating cavity, adjacent dispersion gaps are communicated through the feeding port, and the battery slurry in the dispersion gaps is conveyed into the next dispersion gap from the feeding port under the action of centrifugal force and subsequent extrusion force of the battery slurry, so that the battery slurry is further dispersed. Therefore, the mixing device of the scheme of the application ensures the stirring of the battery slurry and effectively disperses the stirred battery slurry. After the dispersing teeth are arranged on the side faces of the baffles, when slurry is dispersed under the relative motion of the two baffles, the dispersing teeth on the baffles can play a role in cutting particle groups while keeping high shear strength, and strong impact and disturbance are caused to particle aggregates in suspension, so that the slurry is fully turbulent in the baffles, and the dispersing effect on nano-scale materials and high solid content formulas is improved.

According to some embodiments of the utility model, a projection of a number of the first dispersion teeth along an axial direction of the dispersion gap is in a closed circular ring shape; and/or the projections of the plurality of second dispersion teeth along the axial direction of the dispersion gap are in a closed circular ring shape.

According to some embodiments of the present invention, a first preset length is set along an axial direction of the rotating baffle, and any length position within the first preset length is provided with the first dispersion teeth; and/or a second preset length is set along the axial direction of the fixed baffle, and the second dispersion teeth are arranged at any length position in the second preset length.

According to some embodiments of the utility model, one of the feed ports communicates with one end of the dispersion gap and the other feed port communicates with the other end of the dispersion gap in the axial direction of the dispersion gap.

According to some embodiments of the present invention, the baffle plate assembly further comprises a bottom plate located in the accommodating chamber, and a central portion of the bottom plate is fixedly connected to a central shaft of the impeller;

one end of the fixed baffle is fixedly connected with the mixing tank, and the other end of the fixed baffle is separated from the bottom plate to form the feeding port; one end of the rotary baffle is fixedly connected with the bottom plate, and the other end of the fixed baffle is separated from the tank wall of the mixing tank to form the feeding port.

According to some embodiments of the utility model, a projection of the first dispersion tooth in the axial direction of the dispersion gap is trapezoidal or triangular or semicircular.

According to some embodiments of the utility model, the mixing tank comprises a lower bottom shell, an upper top shell and an annular side shell, the lower bottom shell is connected with one end of the annular side shell in a sealing manner, the upper top shell is connected with the other end of the annular side shell in a sealing manner, and the lower bottom shell, the upper top shell and the annular side shell form the accommodating cavity therebetween;

the mixing tank is provided with a discharge hole communicated with the discharge cavity, and a discharge cavity is formed between the outermost fixed baffle and the annular side shell or between the outermost rotary baffle and the annular side shell.

According to some embodiments of the utility model, the number of the fixed baffles is the same as the number of the rotating baffles, the rotating baffles are positioned outside the fixed baffles, and a discharge chamber is formed between the rotating baffles on the outermost layer and the annular side shell; the baffle plate assembly further comprises a discharging column located in the discharging cavity, the discharging column is fixedly connected to the outermost rotating baffle plate along the axial direction of the rotating baffle plate, and the discharging opening is formed in the annular side shell.

According to some embodiments of the present invention, the fixed baffle defines a cooling chamber therein, and a side wall of the fixed baffle is provided with a cooling medium inlet and a cooling medium outlet communicating with the cooling chamber.

The system for manufacturing the battery paste according to the embodiment of the utility model comprises: the stirring equipment is used for stirring the battery slurry and is provided with a solvent inlet; the above-described mixing apparatus; the feeding device is communicated with the mixing cavity and is used for providing battery powder for the mixing cavity; circulation conveyor, including first pipeline, second pipeline and circulating pump, first pipe connection in the blending tank with between the agitated vessel, be used for with the battery thick liquids that dispersion was accomplished in the agitated vessel carry to the agitated vessel, the second pipe connection in the agitated vessel with between the blending tank, be used for with the battery thick liquids that the stirring was accomplished in the agitated vessel carry to the blending tank, and be used for with solvent carries to in the agitated vessel the blending tank, the circulating pump is used for making the battery thick liquids be in the blending tank with circulate between the agitated vessel.

The system for manufacturing the battery slurry has the following beneficial effects: after the mixing equipment is used for dispersing the battery slurry, the dispersed battery slurry is conveyed to the stirring tank, the stirring paddle is used for further stirring the battery slurry in the stirring tank, the stirred battery slurry is conveyed to the mixing cavity in the mixing tank, and the battery slurry circulates among the mixing cavity, the dispersing gap and the stirring tank until the required battery slurry is obtained. By the mode, the problem that the temperature rise is too high due to long-time stirring of the battery slurry in a single device can be avoided.

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

Drawings

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

FIG. 1 is a schematic view showing an internal structure of a mixing tank in a mixing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a set of dispersion teeth in a mixing apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic view showing another internal structure of a mixing tank in the mixing apparatus according to the embodiment of the present invention;

FIG. 4 is a schematic view showing another internal structure of a mixing tank in the mixing apparatus according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of a rotating baffle in a mixing apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic view of a dispersing tooth set in a mixing apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic view of another arrangement of sets of dispersing teeth in a mixing apparatus according to an embodiment of the present invention.

FIG. 8 is a schematic view of another arrangement of sets of dispersing teeth in a mixing apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic view of the assembly between the baffle assembly and the impeller in the mixing apparatus according to the embodiment of the present invention;

FIG. 10 is a radial cross-sectional view of a stationary baffle in a mixing apparatus according to an embodiment of the present invention;

FIG. 11 is another radial cross-sectional view of a stationary baffle in a mixing apparatus according to an embodiment of the present invention;

FIG. 12 is a schematic view of the overall structure of a mixing apparatus according to an embodiment of the present invention;

fig. 13 shows a system for manufacturing a battery paste according to an embodiment of the present invention.

Reference numerals:

a mixing device 10;

the mixing tank 100, the lower bottom shell 110, the upper top shell 120, the annular side shell 130, the discharge opening 131, the accommodating cavity 140, the mixing cavity 141, the dispersion gap 142, the discharge cavity 143 and the feed opening 144;

the baffle assembly 200, the stationary baffle 210, the cooling cavity 211, the rotating baffle 220, the bottom plate 230, the discharge column 240;

a dispersion tooth group 300, a first dispersion tooth 310, a second dispersion tooth 320;

an impeller 400;

a first driving member 500;

a feeding device 600, a screw feeder 610, a feeding bin 620;

the stirring device 700, the stirring tank 710, the stirring paddle 720 and the second driving member 730;

circulation conveyor 800, first pipeline 810, second pipeline 820, circulating pump 830.

Detailed Description

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

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

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

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

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

According to the present invention, a mixing apparatus 10, referring to fig. 1 and 2, includes a mixing tank 100, an impeller 400, a baffle assembly 200, a set of dispersion teeth 300, and a first driving member 500, the mixing tank 100 defining a receiving cavity 140; the impeller 400 is disposed in the accommodating chamber 140; the baffle plate assembly 200 comprises at least one annular fixed baffle plate 210 and at least one annular rotating baffle plate 220, the fixed baffle plate 210 and the rotating baffle plate 220 are sequentially arranged in a staggered manner from inside to outside along the radial direction of the accommodating cavity 140, the central axes of the fixed baffle plate 210 and the rotating baffle plate 220 are both overlapped with the central axis of the accommodating cavity 140, wherein the fixed baffle plate 210 and the rotating baffle plate 220 enable the accommodating cavity 140 to form a mixing cavity 141 and a dispersing gap 142 between the fixed baffle plate 210 and the rotating baffle plate 220 from inside to outside, the impeller 400 is positioned in the mixing cavity 141, the side parts of the dispersing gap 142 close to and far away from the impeller 400 are both provided with a feeding port 144, and the feeding port 144 is communicated with the dispersing gap 142 and the mixing cavity 141, or the feeding port 144 is communicated with different dispersing gaps 142 and is communicated with the dispersing gap 142 and the mixing cavity 141; the dispersing tooth group 300 comprises a plurality of first dispersing teeth 310, and the plurality of first dispersing teeth 310 are fixedly connected to the rotating baffle 220 and used for shearing and dispersing the battery materials in the dispersing gap 142; and/or the dispersing tooth group 300 comprises a plurality of second dispersing teeth 320, and the plurality of second dispersing teeth 320 are fixedly connected to the fixed baffle 210 and used for shearing and dispersing the battery materials in the dispersing gap 142; and the first driving member 500 is connected with the impeller 400 and used for driving the impeller 400 to rotate, and the first driving member 500 is connected with the rotating baffle 220 and used for driving the rotating baffle 220 to rotate.

Specifically, the battery material is added into the mixing chamber 141, the first driving member 500 drives the impeller 400 to rotate, and the impeller 400 stirs the battery material and the battery solvent, so as to manufacture a preliminary battery material. During the process of stirring the battery materials, the impeller 400 generates centrifugal force to the battery materials, and the battery materials enter the dispersing gap 142 from the feeding port 144, i.e. between the rotating baffle 220 and the fixed baffle 210. First driving piece 500 drive rotates baffle 220 and rotates, fixed baffle 210 and rotation baffle 220 relative motion, and the clearance is less between rotation baffle 220 and the fixed baffle 210, the scope is roughly at 1mm ~ 20mm, rotation baffle 220 drives battery material circumferential motion, first dispersion tooth 310 disperses, cuts the battery material in dispersion clearance 142 this moment, or second dispersion tooth 320 disperses, cuts the battery material in dispersion clearance 142, or first dispersion tooth 310 disperses, cuts the battery material in dispersion clearance 142 simultaneously with second dispersion tooth 320, make preliminary battery thick liquids from this. It should be noted that a plurality of dispersion gaps 142 may be continuously disposed along the radial direction of the accommodating cavity 140, adjacent dispersion gaps 142 are communicated through a feeding port 144, and the battery slurry in the dispersion gap 142 is conveyed from the feeding port 144 to the next dispersion gap 142 under the action of centrifugal force and subsequent extrusion force of the battery slurry, so as to further disperse the battery slurry. It should be noted that the next dispersion gap 142 is located outside the previous dispersion gap 142. As can be seen from the above, the mixing device 10 of the present application not only ensures the stirring of the battery slurry, but also effectively disperses the stirred battery slurry.

It should be noted that the dispersing tooth set 200 can cut the particle group, and cause strong impact and disturbance to the particle group in the suspension, so that the battery slurry forms turbulence in the dispersing gap 142, which is beneficial to improving the dispersing effect on the nano-scale material and the high solid content formula.

It can be understood that the first dispersing teeth 310 are fixedly connected to the rotating baffle 220, and during the rotation of the rotating baffle 220, the rotating baffle 220 drives the first dispersing teeth 310 to rotate, and the first dispersing teeth 310 rotate in the dispersing gap 142, so that the material can be preferably sheared and dispersed.

Moreover, the fixed baffles 210 and the rotating baffles 220 are sequentially arranged in a staggered manner along the radial direction of the accommodating cavity 140, as shown in the figure, the baffle positioned outside the impeller 400 is the fixed baffle 210, the impeller 400 and the fixed baffle 210 move relatively, and the battery slurry can flow from the fixed baffle 210 to the dispersing gap 142 under the action of centrifugal force. It should be noted that, referring to fig. 3 and 4, the number of the fixed baffles 210 is the same as the number of the rotating baffles 220, and the outermost baffle in the baffle assembly 200 is the rotating baffle 220; or, referring to fig. 1, the number of the fixed barrier 210 is one more than the number of the rotating barrier 220, and the outermost barrier in the barrier assembly 200 is the fixed barrier 210. It should be noted that the number of the fixed shutters 210 is one less than the number of the rotating shutters 220. In order to facilitate the material to be thrown out of the mixing tank 100 under the centrifugal force of the impeller 400, a fixed baffle 210 is disposed outside the impeller instead of the rotating baffle 220. If the number of the fixed baffles 210 is one less than the number of the rotating baffles 220, since the fixed baffles 210 are located outside the impeller 400 and the rotating baffles 220 are located outside the fixed baffles 210, if the number of the fixed baffles 210 is one less than the number of the rotating baffles 220, there will be two adjacent rotating baffles 220, and thus, the dispersing gap 142 will be formed between the two rotating baffles 220, the two rotating baffles 220 rotate synchronously, and the dispersing tooth group 200 cannot effectively disperse the battery paste.

In addition, the number of the impellers 400 is not limited, and one or more impellers 400 may be used, and if one impeller 400 is used, the central axis of the impeller 400 coincides with the central axis of the accommodating cavity 140.

Referring to fig. 1, the dispersion gaps 142 are provided with feed ports 144 at the sides close to and far from the impeller 400, and it can be seen that each dispersion gap 142 is provided with two feed ports 144, wherein one feed port 144 is used for feeding the battery slurry to the dispersion gap 142, the other feed port 144 is used for discharging the dispersed battery slurry, and the feed port 144 between two adjacent dispersion gaps 142 is used for feeding the battery slurry from one dispersion gap 142 to the other dispersion gap 142. Further, when two feeding ports 144 of one dispersion gap 142 are designed, one feeding port 144 is communicated with one end of the dispersion gap 142, and the other feeding port 144 is communicated with the other end of the dispersion gap 142 along the axial direction of the dispersion gap 142; so, the battery thick liquids in dispersion clearance 142 flow to the other end from the one end in dispersion clearance 142, and the motion path of battery thick liquids is longer, and dispersion tooth group 300 can fully disperse the battery thick liquids, guarantees that the battery thick liquids is dispersed by the probability greatly.

The feeding ports 144 are disposed at two ends of the dispersing gap 142, the feeding ports 144 are through holes (not shown) formed in the sidewalls of the fixed baffle 210 and the rotating baffle 220, the positions of the through holes are not limited, and the battery slurry moves from the through holes to the outside under the action of centrifugal force.

Further, referring to fig. 2 and 5, the plurality of first dispersing teeth 310 are fixedly connected to the inner wall of the rotating baffle 220 at intervals, and a projection of the plurality of first dispersing teeth 310 along the axial direction of the dispersing gap 142 is a closed circular ring shape, it should be noted that the axial direction of the dispersing gap 142 coincides with the axial direction of the impeller 400, so that when the battery slurry moves along the axial direction of the dispersing gap 142, the first dispersing teeth 310 can preferably block the axial movement of the battery slurry, so that the first dispersing teeth 310 can sufficiently shear and disperse the battery slurry; similarly, the plurality of second dispersing teeth 320 are fixedly connected to the inner wall of the fixing baffle 210 at intervals, and the projection of the plurality of second dispersing teeth 320 along the axial direction of the dispersing gap 142 is in a closed circular ring shape, so that when the battery slurry moves along the axial direction of the dispersing gap 142, the second dispersing teeth 320 can block the axial movement of the battery slurry better, and the second dispersing teeth 320 can fully shear and disperse the battery slurry.

Furthermore, a first preset length is set along the axial direction of the rotating baffle 220, that is, within the height interval of the rotating baffle 220, the size of the first preset length is consistent with the height of the rotating baffle 220, and any height position of the first preset length is provided with the first dispersing teeth 310, so that when the battery slurry passes through the interval of the first preset length along the dispersing gap 142, the first dispersing teeth 310 can disperse the battery slurry of any height; similarly, the axial direction along fixed stop 210 is set with the second length of predetermineeing, in the high interval along fixed stop 210 promptly, the size of the second length of predetermineeing is unanimous with fixed stop 210's height, and the arbitrary high position of the second length of predetermineeing all is provided with second dispersion tooth 320, so, when battery thick liquids along dispersion clearance 142 through the interval of the second length of predetermineeing, second dispersion tooth 320 can disperse the battery thick liquids of arbitrary height.

In some embodiments, referring to fig. 5 to 8, a projection of the first dispersing tooth 310 along the axial direction of the dispersing gap 142 is trapezoidal or triangular or semicircular, the first dispersing tooth 310 adopts the above structure, and the size of the first dispersing tooth 310 gradually decreases from one end close to the rotating baffle 220 to one end far away from the rotating baffle 220, so as to reduce the resistance of the battery slurry to the first dispersing tooth 310, and further enable the first dispersing tooth 310 to shear and disperse the battery slurry more smoothly; similarly, the projection of the second dispersing teeth 320 along the axial direction of the dispersing gap 142 is trapezoidal or triangular or semicircular, the second dispersing teeth 320 adopt the above structure, the size of the second dispersing teeth 320 is gradually reduced from the end close to the fixed baffle 210 to the end close to the baffle 210, so that the resistance of the battery slurry to the second dispersing teeth 320 is reduced, and the second dispersing teeth 320 can smoothly shear and disperse the battery slurry.

In some embodiments, referring to fig. 1 and 2, the mixing tank 100 includes a lower bottom shell 110, an annular side shell 130, and an upper top shell 120, the annular side shell 130 is vertically disposed, the lower bottom shell 110 is connected to a lower end portion of the annular side shell 130 for sealing the lower end portion of the annular side shell 130, the upper top shell 120 is connected to an upper end portion of the annular side shell 130 for sealing the upper end portion of the annular side shell 130, a receiving cavity 140 is formed between the lower bottom shell 110, the annular side shell 130, and the upper top shell 120, a fixed baffle 210 and a rotating baffle 220 are vertically disposed in the annular side shell 130, and a central axis of the fixed baffle 210 and a central axis of the rotating baffle 220 are coincident with a central axis of the annular side shell 130.

The baffle assembly 200 further includes a circular bottom plate 230, the bottom plate 230 is horizontally disposed above the lower bottom shell 110 and below the annular side shell 130, the lower side surface of the bottom plate 230 and the lower bottom shell 110 can be separately or rotatably connected, and the central portion of the upper side surface of the bottom plate 230 is fixedly connected to the central axis of the impeller 400 (in the above solution, one impeller 400 is adopted, the central axis of the impeller 400 coincides with the central axis of the accommodating cavity 140; if a plurality of impellers 400 are adopted, a separate driving shaft is required to be connected between the bottom plate 230 and the first driving member 500). The fixed baffle 210 and the rotating baffle 220 are both vertically positioned above the bottom plate 230, the upper top of the fixed baffle 210 is fixedly connected with the upper top shell 120, and the lower end of the fixed baffle 210 is separated from the bottom plate 230, so that a feeding port 144 communicated with the lower end of the dispersing gap 142 is formed. The lower end of the rotary baffle 220 is fixedly connected with the bottom plate 230, and the upper end of the rotary baffle 220 is separated from the upper top shell 120, so that another feeding port 144 communicated with the upper end of the dispersion gap 142 is formed; in this way, when the battery paste is dispersed, the battery paste is transported in the axial direction of the dispersion gap 142, i.e., vertically.

Referring to fig. 3 and 4, the number of the rotating baffles 220 is the same as that of the fixed baffles 210, the outermost baffle of the baffle assembly 200 is the rotating baffle 220, the rotating baffle 220 is separated from the annular side shell 130 and forms an annular discharge chamber 143, and the outer part of the annular side shell 130 is provided with a discharge port 131 communicated with the discharge chamber 143; meanwhile, the baffle plate assembly 200 further includes a plurality of discharging pillars 240 (refer to fig. 9), the discharging pillars 240 are arranged at intervals along the circumferential direction of the rotating baffle plate 220, and the discharging pillars 240 are fixed along the axial direction of the rotating baffle plate 220, that is, vertically and fixedly connected to the outer wall of the rotating baffle plate 220. By adopting the above scheme, the dispersed battery slurry is conveyed from the feeding port 144 to the discharging chamber 143, and then discharged from the discharging port 131 of the discharging chamber 143; instead, the battery paste may also be discharged directly from the dispersion gap 142.

Through the arrangement of the discharging column 240, the discharging column 240 rotates synchronously with the rotating baffle 220, so that the cell slurry in the discharging cavity 143 moves circumferentially, and the cell slurry in the discharging cavity 143 has a larger centrifugal force. The discharge port 131 is disposed on the side of the annular side casing 130, i.e., the side of the discharge chamber 143 in the circumferential direction, and the battery slurry can be discharged from the discharge port 131 more smoothly by the centrifugal force.

In order to prevent the battery slurry from generating a high temperature when the battery slurry is cut, in some embodiments, referring to fig. 10, a cooling cavity 211 is integrated in the fixed baffle 210, and a cooling medium inlet and a cooling medium outlet which are communicated with the cooling cavity 211 are disposed on the fixed baffle 210. In operation of the mixing apparatus 10, external cooling medium is delivered from the cooling medium inlet into the cooling chamber 211, where the cooling medium cools the stationary baffle 210, thereby cooling the battery slurry in the dispersion gap 142; and, the cooling medium is discharged from the cooling medium outlet and the cooling medium in the cooling chamber 211 is replaced, thereby enabling better cooling of the battery paste, and the cooling medium may be cooling water, nitrogen gas, or the like.

Further, the cooling cavity 211 is an annular cavity disposed inside the fixed baffle 210, the cooling medium inlet communicates with the upper end portion of the cooling cavity 211, and the cooling medium outlet communicates with the lower end portion of the cooling cavity 211, so that the cooling medium in the cooling cavity 211 has a sufficiently large contact area with the fixed baffle 210, thereby sufficiently cooling the fixed baffle 210. Or, referring to fig. 11, the cooling cavity 211 is composed of a plurality of cooling channels, the plurality of cooling channels are arranged around the fixed baffle 210 at intervals, one end of the cooling channel extends to one end of the fixed baffle 210, the other end of the cooling channel extends to the other end of the fixed baffle 210, the plurality of cooling channels are sequentially communicated, the cooling medium inlet is communicated with one port of the cooling cavity 210, and the cooling medium outlet is communicated with the other port of the cooling cavity 210. The cooling medium passes through a plurality of cooling channel in proper order from the cooling medium import to discharge from the cooling medium export, so, cooling medium fully absorbs fixed stop 210's heat, thereby cools down battery thick liquids, and the cooling effect of cooling medium reaches the optimal effect this moment.

Further, in order to increase the contact area between the fixing baffle 210 and the battery paste, the fixing baffle 210 is in a wave shape (not shown) along the circumferential direction of the fixing baffle 210, so that the contact area between the surface of the fixing baffle 210 and the battery paste is large, thereby better cooling the battery paste.

In some embodiments, referring to fig. 1 and 12, the mixing apparatus 10 further includes a feeding device 600, the feeding device 600 includes a feeding bin 620 and a screw feeder 610, the screw feeder 610 has a powder inlet and a powder outlet, the powder inlet is disposed above the left end of the screw feeder 610, the feeding bin 620 is communicated with the powder inlet, and the battery powder in the feeding bin 620 falls into the screw feeder 610. The powder outlet is arranged at the right end of the screw feeder 610, the powder outlet is connected to the upper top shell 120 and communicated with the mixing chamber 141, and the screw feeder 610 conveys the battery powder into the mixing chamber 141.

According to a second aspect of the present invention, a manufacturing system of battery slurry is disclosed, referring to fig. 1 and 13, including the above-mentioned mixing device 10, further including a stirring device 700 and a circulating conveying device 800, where the stirring device is used for stirring the battery slurry, and the stirring device is provided with a solvent inlet 711; the circulation conveying device 800 includes a first pipe 810, a second pipe 820 and a circulation pump 830, the first pipe 810 is connected between the mixing tank 100 and the stirring apparatus for conveying the battery slurry dispersed in the mixing apparatus 10 to the stirring apparatus, the second pipe 820 is connected between the stirring apparatus and the mixing tank 100 for conveying the battery slurry stirred in the stirring apparatus to the mixing tank 100 and for conveying the solvent in the stirring apparatus to the mixing tank 100, and the circulation pump 830 is used for circulating the battery slurry between the mixing tank 100 and the stirring apparatus 700.

The stirring device 700 comprises a stirring tank 710, a stirring paddle 720 and a second driving member 730, wherein the first pipeline 810 and the second pipeline 820 are both communicated with the stirring tank 710, the first pipeline 810 is used for conveying the dispersed battery slurry into the stirring tank 710, and the second pipeline 820 is used for conveying the solvent in the stirring tank 710 and the stirred battery slurry into the mixing cavity 141. Stirring paddle 720 is vertical to be set up in agitator tank 710, and stirring paddle 720's drive shaft rotates with agitator tank 710's top to be connected, and second driving piece 730 assembly connection is in agitator tank 710's top to be connected with above-mentioned drive shaft, so, second driving piece 730 drive stirring paddle 720 rotates, and stirring paddle 720 stirs the battery thick liquids in to agitator tank 710.

Specifically, the manufacturing system of the battery slurry comprises a charging stage and a circulating stage in the working process. During the charging phase, the battery powder in the supply bin 620 is continuously fed into the screw feeder 610 and is fed into the mixing chamber 141 through the screw feeder 610. Meanwhile, the solvent is fed into the agitation tank 710 through the solvent inlet 711, the solvent in the agitation tank 710 is fed into the mixing chamber 141 through the second pipe 820, the impeller 400 agitates the battery powder, so that the battery powder and the solvent are sufficiently mixed and fed into the dispersion gap 142, and the dispersion teeth 300 disperse the battery slurry in the dispersion gap 142 (see fig. 2). The dispersed battery slurry is conveyed from the first pipeline 810 to the stirring tank 710 under the action of the circulating pump 830, the battery slurry is further stirred by the stirring paddle 720, and the stirred battery slurry is circulated from the second pipeline 820 to the mixing chamber 141 under the action of the circulating pump 830. In the manner described above, the battery slurry is circulated between the mixing tank 100 and the agitation tank 710, the number of cycles being not limited, until the end of the charging. In the charging stage, the flow direction of the solvent charged into the mixing tank 100 through the agitation tank 710 coincides with the flow direction of the battery slurry. In the circulation stage, the feeding device 600 stops adding the battery powder into the mixing tank 100, and the battery slurry circulates among the mixing cavity 141, the dispersion gap 142 and the stirring tank 710 until each parameter of the battery slurry reaches the standard, so that the stirring and dispersion of the battery slurry are stopped. The battery slurry is circularly treated, so that the problem of overhigh temperature rise caused by long-time stirring of the battery slurry in a single device can be avoided, the solid content of the slurry can be improved, and the processing efficiency of the slurry can be improved; in addition, the solid content of the battery slurry is increased, so that the usage amount of NMP (N-methyl pyrrolidone) in the production of the battery slurry can be reduced, and the energy consumption of coating equipment can be reduced, and the production cost of the battery can be reduced.

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

Claims

1. Mixing apparatus, characterised by comprising:

a mixing tank defining an accommodating chamber;

the impeller is arranged in the accommodating cavity;

the baffle plate assembly comprises at least one annular fixed baffle plate and at least one annular rotating baffle plate, the fixed baffle plate and the rotating baffle plate are sequentially arranged in a staggered manner from inside to outside along the radial direction of the accommodating cavity, the central axes of the fixed baffle plate and the rotating baffle plate are overlapped with the central axis of the accommodating cavity, the fixed baffle plate and the rotating baffle plate enable the accommodating cavity to sequentially form a mixing cavity and a dispersing gap between the fixed baffle plate and the rotating baffle plate from inside to outside, the impeller is positioned in the mixing cavity, the side parts of the dispersing gap close to and far away from the impeller are provided with feeding ports, and the feeding ports are communicated with the dispersing gap and the mixing cavity, or the feeding ports are communicated with different dispersing gaps and are communicated with the dispersing gap and the mixing cavity;

2. The mixing apparatus according to claim 1, wherein a projection of a number of said first dispersion teeth along an axial direction of said dispersion gap is in the shape of a closed circular ring; and/or the projections of the plurality of second dispersion teeth along the axial direction of the dispersion gap are in a closed circular ring shape.

3. The mixing apparatus according to claim 1, wherein a first preset length is set in an axial direction of the rotating baffle, and the first dispersion teeth are provided at any length position within the first preset length; and/or a second preset length is set along the axial direction of the fixed baffle, and the second dispersion teeth are arranged at any length position in the second preset length.

4. The mixing apparatus according to any one of claims 1 to 3, wherein one of said feed ports communicates with one end of said dispersion gap and the other feed port communicates with the other end of said dispersion gap in the axial direction of said dispersion gap.

5. The mixing apparatus of claim 1, wherein the baffle assembly further comprises a bottom plate disposed in the receiving chamber, a central portion of the bottom plate being fixedly connected to a central axis of the impeller;

6. Mixing device according to claim 1, wherein the projection of the first dispersion tooth in the axial direction of the dispersion gap is trapezoidal or triangular or semicircular.

7. The mixing apparatus of claim 1 wherein said mixing tank comprises a lower bottom shell, an upper top shell, and an annular side shell, said lower bottom shell being sealingly connected to one end of said annular side shell, said upper top shell being sealingly connected to the other end of said annular side shell, said lower bottom shell, said upper top shell, and said annular side shell defining said receiving chamber therebetween;

8. The mixing apparatus of claim 7 wherein said fixed baffles are in the same number as said rotating baffles and said rotating baffles are located outside of said fixed baffles, with a discharge chamber being formed between the outermost of said rotating baffles and said annular side casing; the baffle plate assembly further comprises a discharging column located in the discharging cavity, the discharging column is fixedly connected to the outermost rotating baffle plate along the axial direction of the rotating baffle plate, and the discharging opening is formed in the annular side shell.

9. The mixing apparatus according to claim 1, wherein the fixed baffle defines a cooling chamber therein, and a side wall of the fixed baffle is provided with a cooling medium inlet and a cooling medium outlet communicating with the cooling chamber.

10. A system for producing a battery paste, comprising:

the stirring equipment is used for stirring the battery slurry and is provided with a solvent inlet;

the mixing device of any one of claims 1 to 9;

the feeding device is communicated with the mixing cavity and is used for providing battery powder for the mixing cavity;

circulation conveyor, including first pipeline, second pipeline and circulating pump, first pipe connection in the blending tank with between the agitated vessel, be used for with the battery thick liquids that dispersion was accomplished in the agitated vessel carry to the agitated vessel, the second pipe connection in the agitated vessel with between the blending tank, be used for with the battery thick liquids that the stirring was accomplished in the agitated vessel carry to the blending tank, and be used for with solvent carries to in the agitated vessel the blending tank, the circulating pump is used for making the battery thick liquids be in the blending tank with circulate between the agitated vessel.