CN111085321A - Lithium battery slurry defoaming and grinding method and device - Google Patents
Lithium battery slurry defoaming and grinding method and device Download PDFInfo
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- CN111085321A CN111085321A CN201911358069.0A CN201911358069A CN111085321A CN 111085321 A CN111085321 A CN 111085321A CN 201911358069 A CN201911358069 A CN 201911358069A CN 111085321 A CN111085321 A CN 111085321A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/92—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with helices or screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
Abstract
The invention relates to the technical field of lithium battery production, and provides a method and a device for defoaming and grinding lithium battery slurry. The lithium battery slurry deaeration grinding device comprises a tank body and a cover body, wherein an accommodating cavity for storing lithium battery slurry is arranged in the tank body, the cover body is sealed at the open end of the tank body, a vacuumizing opening and a stirring and grinding mechanism are arranged on the cover body, and the vacuumizing opening is communicated with the accommodating cavity; the stirring and grinding mechanism extends to the accommodating cavity and is used for stirring and grinding the lithium battery slurry in the accommodating cavity. The lithium battery slurry defoaming and grinding method comprises the following steps: the vacuumizing port vacuumizes the accommodating cavity filled with the lithium battery slurry in real time; the stirring and grinding mechanism stirs and grinds the lithium battery slurry in the accommodating cavity. The embodiment of the invention realizes the simultaneous defoaming and grinding of the lithium battery slurry.
Description
Technical Field
The invention relates to the technical field of lithium battery production, in particular to a lithium battery slurry defoaming and grinding method and device.
Background
With the development of new energy automobiles, the requirements on lithium ion power batteries are higher and higher, and the requirements on lithium battery production processes are also higher and higher. In the process of manufacturing the lithium battery, effective active substances are required to be stirred and mixed by a battery slurry stirrer to form battery slurry, and then the battery slurry is uniformly coated on a metal foil. In thick liquids mixing process, can produce the caking, though through dispersion breakage and filtration, the thick liquids also has the minimum caking or reunite the existence, and the caking thick liquids can lead to filter core life to reduce in the filtering process, and thick liquids exist when scribbling leftover of bolt of cloth extrusion coating simultaneously and scrape disconnected substrate or coating surface mar risk, and then influence the pole piece quality.
Before the lithium battery coating process, the slurry after dispersion and stirring is subjected to a vacuum-pumping defoaming process again, so that the bubbles in the slurry are eliminated, and the influence of the bubbles on the surface cracking of the pole piece coating in the drying process of the coating is reduced. At present, the commonly used defoaming equipment mainly comprises a stirring motor, a vacuum pumping port, a stirring defoaming paddle and a defoaming tank body. Stirring deaeration oar stirs in the deaeration tank body, makes the bubble in the thick liquids discharge, and this type of design function singleness can only satisfy the thick liquids deaeration requirement, but can have caking or large granule material in some thick liquids, if do not grind and eliminate these caking or large granule material, also can influence the normal use of lithium cell, and current deaeration equipment does not possess thick liquids and grinds or eliminate the caking function.
The following are the main types of slurry crushing and grinding devices used: double-screw extrusion grinding, circular feeding type nano powder slurry grinding, double-planet structure stirring and high-speed dispersion disc structure homogenate crushing. The above slurry crushing and grinding apparatus can only grind slurry, and cannot achieve the effects of stirring and exhausting.
The viscosity is an important performance index of the lithium battery slurry, the coating of the pole piece is not facilitated when the viscosity is too high or too low, the slurry with high viscosity is not easy to precipitate, the dispersibility is good, but the leveling effect cannot be realized when the viscosity is too high, and the coating is not facilitated; when the viscosity is too low, the slurry has good fluidity, but drying is difficult, the drying efficiency of coating is lowered, and problems such as cracking of the coating, agglomeration of slurry particles, and poor surface density uniformity may occur.
At present, the commonly used lithium battery homogenizing process comprises filtering, defoaming and offline viscosity detection, and if slurry can be ground while being defoamed to thoroughly eliminate agglomeration or conglobation, the homogenizing process does not need a filtering link any more, so that the slurry loss in a filtering process is reduced, a filter element does not need to be frequently replaced, and the pulping efficiency is improved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a lithium battery slurry defoaming and grinding method, which optimizes the multi-step process flow of filtering, defoaming and off-line viscosity detection in the conventional homogenizing process into: the filtering is cancelled, the defoaming, grinding and on-line viscosity detection are integrated, meanwhile, on the basis of the original conventional process flow, the viscosity of the novel method is controllable according to the specification of the screen mesh in the aspect of fineness control, the fineness uniformity can be controlled according to the specification of the screen mesh, the aggregate extrusion crushing process can still better ensure the fineness uniformity of the slurry after the filtering process is cancelled, the problems of slurry loss and frequent cleaning and replacement of a filter element in the filtering process are solved, and the utilization rate and the production efficiency of the slurry are improved.
According to the embodiment of the first aspect of the invention, the deaeration grinding device for the lithium battery slurry comprises a tank body and a cover body, wherein a containing cavity for storing the lithium battery slurry is arranged in the tank body, a cover body sealing cover is arranged at the open end of the tank body, a vacuumizing port and a stirring grinding mechanism are arranged on the cover body, and the vacuumizing port is communicated with the containing cavity;
the stirring and grinding mechanism extends to the accommodating cavity and is used for stirring and grinding the lithium battery slurry in the accommodating cavity.
According to the lithium battery slurry defoaming and grinding device provided by the embodiment of the invention, the vacuumizing port and the stirring and grinding mechanism are arranged on the cover body, so that the battery slurry in the accommodating cavity is stirred and ground, caking or agglomeration in the lithium battery slurry is effectively eliminated, the stirring time is shortened, the vacuumizing port performs a vacuum pumping action on the accommodating cavity in real time, the battery slurry defoaming effect is realized, and the processing efficiency and quality of the slurry are improved.
According to one embodiment of the invention, the stirring and grinding mechanism comprises a motor, a speed reducer is assembled at the driving end of the motor, the output end of the speed reducer is connected with a grinding shaft, the grinding shaft extends to the bottom of the accommodating cavity, the first end of the grinding shaft is connected with the output end of the speed reducer, and the second end of the grinding shaft is provided with a stirring paddle.
According to one embodiment of the invention, the grinding shaft is sleeved with a sleeve, and the grinding shaft is provided with a helical blade arranged along the axial direction of the grinding shaft.
According to one embodiment of the invention, the leads of the helical blades decrease in succession in the direction from the second end of the grinding shaft to the first end of the grinding shaft.
According to an embodiment of the invention, the first port of the sleeve is connected with the end face of the cover body, and a plug is arranged between the second port of the sleeve and the grinding shaft.
According to one embodiment of the invention, a plurality of discharge holes are uniformly arranged on the side wall of the sleeve close to the first port of the sleeve in the circumferential direction of the sleeve, and a plurality of feed holes are uniformly arranged on the side wall of the sleeve close to the second port of the sleeve in the circumferential direction of the sleeve.
According to one embodiment of the invention, the size of the discharge ports along the circumferential direction of the sleeve is smaller than that of the feed ports along the circumferential direction of the sleeve, and the number of the discharge ports is more than that of the feed ports.
According to one embodiment of the invention, the grinding shaft is provided with a plurality of rectangular teeth along the circumferential direction of the grinding shaft at positions corresponding to the discharge port.
According to one embodiment of the invention, the cover body is provided with a mounting hole, a viscometer is arranged in the mounting hole in a penetrating manner, and a detection end of the viscometer extends into the accommodating cavity.
According to the second aspect of the invention, the lithium battery slurry deaeration grinding method comprises the following steps:
the vacuumizing port vacuumizes the accommodating cavity filled with the lithium battery slurry in real time;
the stirring and grinding mechanism stirs and grinds the lithium battery slurry in the accommodating cavity.
According to the embodiment of the invention, the lithium battery slurry defoaming and grinding method is simple to operate, the synchronous defoaming and grinding of the lithium battery slurry are effectively realized, and the treatment efficiency and quality of the lithium battery slurry are improved. Compared with the traditional single vacuum defoaming principle, the defoaming efficiency of the method is higher by the principle of combining extrusion crushing and vacuum; in the aspect of online viscosity detection, as the viscosity uniformity and batch stability of the slurry are key factors influencing the coating process, the viscosity monitoring function of each layer of the slurry is integrated in the defoaming process, the viscosity uniformity characteristic of the prepared slurry can be comprehensively evaluated online, and the coating quality and the surface density fluctuation control of the next coating process are further ensured.
Additional aspects and advantages of the invention 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 invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic view of a disassembled structure of a lithium battery slurry defoaming and grinding device according to an embodiment of the invention;
FIG. 2 is an assembled cross-sectional view of a lithium battery slurry degassing and grinding apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view showing the flow direction of lithium battery slurry in the defoaming and grinding apparatus for lithium battery slurry according to the embodiment of the invention;
FIG. 4 is a schematic view of an assembly structure of a grinding shaft and a sleeve of the defoaming and grinding apparatus for lithium battery slurry according to the embodiment of the invention;
fig. 5 is a sectional view taken along a-a in fig. 4.
Reference numerals:
1: a tank body; 2: a cover body; 3: an accommodating cavity; 4: a vacuum pumping port; 5: a motor; 6: a speed reducer; 7: grinding the shaft; 8: a stirring paddle; 9: a sleeve; 10: a propeller blade; 11: a plug; 12: a discharge port; 13: a feed inlet; 14: rectangular teeth; 15: a viscometer; 16: sealing sleeves; 17: a seal ring; 18: a material injection pipe; 19: a handle; 20: a first lug; 21: and a second lug.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1 to 5, an embodiment of the present invention provides a lithium battery slurry deaeration grinding apparatus, which includes a tank 1 and a cover 2, wherein an accommodating chamber 3 for storing lithium battery slurry is disposed in the tank 1, the cover 2 is hermetically sealed at an open end of the tank 1, a vacuum pumping port 4 and a stirring and grinding mechanism are disposed on the cover 2, and the vacuum pumping port 4 is communicated with the accommodating chamber 3;
the stirring and grinding mechanism extends into the accommodating cavity 3 and is used for stirring and grinding the lithium battery slurry in the accommodating cavity 3.
According to the lithium battery slurry defoaming and grinding device provided by the embodiment of the invention, the vacuumizing port 4 and the stirring and grinding mechanism are arranged on the cover body 2, so that the battery slurry in the accommodating cavity 3 is stirred and ground, caking or agglomeration in the lithium battery slurry is effectively eliminated, the stirring time is shortened, the vacuumizing port 4 performs a vacuum pumping action on the accommodating cavity 3 in real time, the battery slurry defoaming effect is realized, and the processing efficiency and quality of the slurry are improved.
According to one embodiment of the invention, the stirring and grinding mechanism comprises a motor 5, a speed reducer 6 is assembled at the driving end of the motor 5, the output end of the speed reducer 6 is connected with a grinding shaft 7, the grinding shaft 7 extends to the bottom of the accommodating cavity 3, the first end of the grinding shaft 7 is connected with the output end of the speed reducer 6, and the second end of the grinding shaft 7 is provided with a stirring paddle 8. It can be understood that the motor 5 is used as a driving part, the driving end of the motor 5 is connected with the input end of the speed reducer 6, and the motor 5 and the speed reducer 6 are selected and matched according to the process requirements so as to obtain the rotating speed required by the process.
Further, be equipped with the perforation on the lid 2, the output of speed reducer 6 is worn to establish in the perforation, and guarantees sealedly, and the output of speed reducer 6 is connected with grinding shaft 7, realizes that the output drive of speed reducer 6 grinds 7 rotations of shaft. Specifically, the upper end of the grinding shaft 7 is fixedly connected with the output end of the speed reducer 6, and welding can be adopted. The lower extreme of grinding shaft 7 extends downwards to the bottom of the chamber of holding chamber 3 in jar body 1 along the axis direction of jar body 1, increases the stirring scope to lithium battery thick liquids in the holding chamber 3. The lower extreme of grinding shaft 7 is equipped with stirring rake 8, and both rigidity are connected, guarantee joint strength, realize the intensive mixing to the lithium cell thick liquids in the holding chamber 3. Preferably, the axis of the grinding shaft 7 coincides with the axis of the tank 1.
The outline of the outer edge of the stirring paddle 8 is the same as the outline of the cavity bottom of the accommodating cavity 3, so that no dead angle is formed in the stirring process, and the stirring efficiency is improved. In this embodiment, the stirring paddle 8 may be a frame type stirring paddle, an anchor type stirring paddle, or a butterfly type stirring paddle.
According to one embodiment of the invention, the grinding shaft 7 is sleeved with a sleeve 9, and the grinding shaft 7 is provided with a helical blade 10 arranged along the axial direction of the grinding shaft 7. It can be understood that the sleeve 9 is sleeved on the outer side of the grinding shaft 7, and the gap between the grinding shaft 7 and the sleeve 9 is used for circulating the lithium battery slurry.
Further, the side wall of the grinding shaft 7 is provided with a helical blade 10, and the helical blade 10 is arranged along the axial direction of the grinding shaft 7, so that the flow guide effect on the lithium battery slurry is realized. The grinding effect of the spiral blade 10 on the circulating lithium battery slurry is achieved, and the grinding effect is improved.
According to one embodiment of the invention, the lead of the helical blade 10 decreases in the direction from the second end of the grinding shaft 7 to the first end of the grinding shaft 7. It can be understood that the lead of the helical blade 10 is reduced from bottom to top along the axis of the grinding shaft 7 in sequence, so that the lithium battery slurry is guided from bottom to top. It should be noted that the helical blade 10 and the stirring paddle 8 rotate coaxially, that is, when the stirring paddle 8 stirs the lithium battery slurry, the helical blade 10 guides the flow of the lithium battery slurry from bottom to top. As shown in fig. 3, the arrow direction is the flow direction of the lithium battery slurry.
According to one embodiment of the invention, the first port of the sleeve 9 is connected to the end face of the cover 2, and a plug 11 is provided between the second port of the sleeve 9 and the grinding shaft 7. It will be appreciated that the upper port of the sleeve 9 is bolted to the inner end face of the cap 2. The lower port of the sleeve 9 is plugged with the grinding shaft 7 through the plug 11, so that lithium battery slurry in the sleeve 9 is prevented from flowing out of the lower port of the sleeve 9, and the grinding efficiency is effectively improved.
In one example, a seal 17 is provided between the plug 11 and the grinding shaft 7 to improve the sealing property of the plug 11. The mounting position of the plug 11 is positioned at the upper side of the connection part of the grinding shaft 7 and the stirring paddle 8.
According to one embodiment of the present invention, the sidewall of the sleeve 9 near the first port thereof is provided with a plurality of discharge ports 12 uniformly arranged along the circumferential direction of the sleeve 9, and the sidewall of the sleeve 9 near the second port thereof is provided with a plurality of feed ports 13 uniformly arranged along the circumferential direction of the sleeve 9. It can be understood that, the lithium battery slurry in the accommodating cavity 3 enters the sleeve 9 from the feed inlet 13 on the side wall of the lower port of the sleeve 9, and under the rotation of the propeller blades 10, the flow guide of the lithium battery slurry is realized, and the lithium battery slurry is discharged out of the sleeve 9 from the discharge port 12 on the side wall of the upper port of the sleeve 9, so that the lithium battery slurry circularly flows, and the sufficient grinding is ensured.
According to one embodiment of the invention, the size of the discharge ports 12 along the circumferential direction of the sleeve 9 is smaller than that of the feed ports 13 along the circumferential direction of the sleeve 9, and the number of the discharge ports 12 is larger than that of the feed ports 13. It is understood that in the present embodiment, the discharge port 12 and the feed port 13 are in the shape of oblong holes arranged in the axial direction of the sleeve 9. The width of the discharge port 12 is smaller than that of the feed port 13, so that the lumps or agglomerates in the lithium battery slurry can enter the sleeve 9 through the feed port 13, the lithium battery slurry after being ground by the grinding shaft 7 is discharged from the discharge port 12, and the lumps or agglomerates in the lithium battery slurry are blocked in the sleeve 9 and continuously ground to the material which can pass through the discharge port 12, so that the lithium battery slurry is fully ground.
Further, the sizes of the feeding hole 13 and the discharging hole 12 can be set according to actual process requirements, and the control of the grinding fineness of different lithium battery slurries is realized by replacing the sleeve 9 provided with the feeding hole 13 and the discharging hole 12 with different sizes.
In one example, a pressure relief port is provided on the side wall of the sleeve 9 above the discharge port 12 to prevent the discharge port 12 from being clogged.
According to one embodiment of the invention, the grinding shaft 7 is provided with a plurality of rectangular teeth 14 in the circumferential direction of the grinding shaft 7 at positions corresponding to the discharge ports 12. It will be appreciated that rectangular teeth 14 are provided on the circumferential side wall of the grinding shaft 7, the rectangular teeth 14 being at the same level as the discharge opening 12. When the rectangular teeth 14 rotate synchronously with the grinding shaft 7, shearing motion is formed between the rectangular teeth 14 and the discharge port, and the lithium battery slurry is sheared and ground to eliminate caking and agglomeration in the lithium battery slurry.
According to one embodiment of the present invention, the cover 2 is provided with a mounting hole, the viscometer 15 is inserted into the mounting hole, and the detection end of the viscometer 15 extends into the accommodating cavity 3. It can be understood that the test end of viscometer 15 passes the mounting hole on the lid 2 downwards to in extending to holding chamber 3 through telescopic sleeve, telescopic sleeve is flexible by the drive of built-in small-size servo motor, realizes the on-line monitoring to different horizontal layer lithium battery thick liquids viscosity, guarantee that the viscosity of lithium battery thick liquids accords with the technological requirement.
In one example, a sealing sleeve 16 is arranged in the mounting hole, so that the viscometer 15 is hermetically mounted in the mounting hole, and the sealing performance of the accommodating cavity 3 is improved.
In one example, a material injecting pipe 18 communicated with the accommodating cavity 3 is arranged on the outer side wall of the tank body 1 for injecting lithium battery slurry into the accommodating cavity 3.
In one example, the outer side wall of the can body 1 is provided with a plurality of handles 19 to facilitate movement of the can body 1.
In one example, a plurality of first lugs 20 are uniformly arranged on the circumferential outer side wall of the tank body 1, second lugs 21 corresponding to the first lugs 20 one to one are uniformly arranged on the circumferential side wall of the cover body 2, and the fastening connection between the cover body 2 and the tank body 1 is realized by arranging hooks on the first lugs 20 and the second lugs 21. In order to improve the sealing performance between the cover body 2 and the tank body 1, a sealing gasket is preferably arranged on the connecting end surface of the cover body 2 and the tank body 1, so that the sealing effect of the accommodating cavity 3 is ensured.
The embodiment of the invention also provides a defoaming and grinding method of lithium battery slurry, which comprises the following steps:
the vacuumizing port vacuumizes the accommodating cavity filled with the lithium battery slurry in real time;
the stirring and grinding mechanism stirs and grinds the lithium battery slurry in the accommodating cavity.
According to the embodiment of the invention, the lithium battery slurry defoaming and grinding method is simple to operate, the synchronous defoaming and grinding of the lithium battery slurry are effectively realized, and the treatment efficiency and quality of the lithium battery slurry are improved.
Specifically, the lithium battery slurry defoaming and grinding method provided by the embodiment of the invention comprises the following steps:
filling lithium battery slurry into the accommodating cavity 3 through the material injection pipe 18 of the tank body 1, and covering the cover body 2 at the upper end of the tank body 1 to ensure the sealing effect of the accommodating cavity 3;
starting the motor 5, adjusting to the rotating speed required by the process through the speed reducer 6, and vacuumizing the accommodating cavity 3 through the vacuumizing port 4;
the speed reducer 6 drives the grinding shaft 7 to rotate, the grinding shaft 7 drives the stirring paddle 8 to rotate, the stirring shaft 8 continuously stirs the lithium battery slurry in the accommodating cavity 3 without dead angles, bubbles in the lithium battery slurry are smashed, and the lithium battery slurry is discharged out of the accommodating cavity 3 under the action of vacuum, so that the defoaming process of the lithium battery slurry is completed;
the grinding shaft 7 drives the propeller blades 10 to synchronously rotate, lithium battery slurry enters the sleeve 9 from the feed port 13 of the sleeve 9, the lithium battery slurry flows upwards under the action of the propeller blades 10, and the propeller blades 10 grind the lithium battery slurry;
the grinding shaft 7 drives the rectangular teeth 14 to rotate, the rectangular teeth 14 and the discharge hole 12 of the sleeve 9 form shearing motion, slurry is sheared and ground, caking and agglomeration in the slurry are eliminated, the ground lithium battery slurry in the sleeve 9 flows into the accommodating cavity 3 from the discharge hole 12, and then enters the sleeve 9 again from the feed hole 13 for circular grinding, the grinding effect is ensured, and the full mixing and dispersion of the component materials are realized;
the viscometer 15 monitors the viscosity of the lithium battery slurry in real time, and ensures that the viscosity of the lithium battery slurry meets the process requirements.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A lithium battery slurry deaeration grinding device comprises a tank body and a cover body, wherein an accommodating cavity for storing lithium battery slurry is arranged in the tank body, and the cover body is sealed at the open end of the tank body;
the stirring and grinding mechanism extends to the accommodating cavity and is used for stirring and grinding the lithium battery slurry in the accommodating cavity.
2. The lithium battery slurry deaeration grinding device according to claim 1, wherein the stirring and grinding mechanism comprises a motor, a speed reducer is mounted at a driving end of the motor, an output end of the speed reducer is connected with a grinding shaft, the grinding shaft extends to a bottom of the accommodating cavity, a first end of the grinding shaft is connected with an output end of the speed reducer, and a second end of the grinding shaft is provided with a stirring paddle.
3. The lithium battery slurry defoaming grinding device of claim 2, wherein the grinding shaft is sleeved with a sleeve, and the grinding shaft is provided with a helical blade arranged along the axial direction of the grinding shaft.
4. The lithium battery slurry deaeration grinding apparatus according to claim 3, wherein a lead of the helical blade is sequentially decreased in a direction from the second end of the grinding shaft to the first end of the grinding shaft.
5. The lithium battery slurry defoaming grinding device as claimed in claim 4, wherein a first port of the sleeve is connected with an end face of the cover body, and a plug is arranged between a second port of the sleeve and the grinding shaft.
6. The lithium battery slurry defoaming and grinding device as claimed in claim 5, wherein a plurality of discharge ports are uniformly arranged along the circumferential direction of the sleeve on the side wall of the sleeve near the first port, and a plurality of feed ports are uniformly arranged along the circumferential direction of the sleeve on the side wall of the sleeve near the second port.
7. The lithium battery slurry deaeration grinding device according to claim 6, wherein a dimension of the discharge ports along the circumferential direction of the sleeve is smaller than a dimension of the feed ports along the circumferential direction of the sleeve, and the number of the discharge ports is greater than the number of the feed ports.
8. The lithium battery slurry deaeration grinding device according to claim 6, wherein a plurality of rectangular teeth are provided along a circumferential direction of the grinding shaft at a position of the grinding shaft corresponding to the discharge port.
9. The lithium battery slurry defoaming and grinding device according to any one of claims 1-8, wherein a mounting hole is formed in the cover body, a viscometer is arranged in the mounting hole in a penetrating manner, and a detection end of the viscometer extends into the accommodating cavity.
10. A lithium battery slurry deaeration grinding method based on the lithium battery slurry deaeration grinding apparatus according to any one of claims 1 to 9, characterized by comprising the steps of:
the vacuumizing port vacuumizes the accommodating cavity filled with the lithium battery slurry in real time;
the stirring and grinding mechanism stirs and grinds the lithium battery slurry in the accommodating cavity.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121710A (en) * | 2020-09-07 | 2020-12-25 | 江西省世道新能源科技有限公司 | Lithium battery chemical slurry processing reaction equipment and implementation method thereof |
| CN112999951A (en) * | 2021-03-03 | 2021-06-22 | 姜仁平 | Graphene slurry mixing reaction kettle |
| CN113522093A (en) * | 2021-06-18 | 2021-10-22 | 南方电网电动汽车服务有限公司 | Lithium battery slurry stirring device and stirring method thereof |
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| CN112999951A (en) * | 2021-03-03 | 2021-06-22 | 姜仁平 | Graphene slurry mixing reaction kettle |
| CN113522093A (en) * | 2021-06-18 | 2021-10-22 | 南方电网电动汽车服务有限公司 | Lithium battery slurry stirring device and stirring method thereof |
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