CN114749420A

CN114749420A - Precursor washing device

Info

Publication number: CN114749420A
Application number: CN202210437035.6A
Authority: CN
Inventors: 张佳峰; 李鹏飞; 王小玮; 邹景田; 余桂辉; 彭德招; 胡文阳; 陆昕宇
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-07-15
Anticipated expiration: 2042-04-25
Also published as: CN114749420B

Abstract

The invention belongs to the technical field of battery material preparation, and discloses a washing device for a precursor of a lithium battery anode material, which comprises a bottom plate and a washing kettle body, wherein the washing kettle body comprises an upper shell and a transparent lower shell, and the lower end of the upper shell is fixedly inserted with the upper end of the lower shell; according to the invention, through the matching of the upper shell, the lower shell, the first telescopic assembly and the liquid discharge pipe, when slurry is fully mixed, the liquid discharge pipe is shielded by the protrusion, so that the liquid discharge pipe is not communicated with the interior of the washing kettle body, the liquid loss in the washing kettle is reduced, and according to the solution mixing condition in the washing kettle body observed by the lower shell, when raw materials are completely mixed, the stirring assembly stops working, the mixed solution is directly precipitated, the mixed solution does not need to be transferred, and the precursor washing efficiency is improved.

Description

Precursor washing device

Technical Field

The invention belongs to the technical field of electrode material preparation, and particularly relates to a washing device for a precursor of a lithium battery anode material.

Background

The key material of the lithium ion battery is a positive electrode material, which accounts for about 30% of the cost of the lithium ion battery, and the positive electrode materials applied in the current market mainly comprise lithium cobaltate, ternary materials, lithium manganate and lithium iron phosphate. The lithium nickel cobalt manganese oxide material is a novel lithium battery positive electrode material; compared with other anode materials, the anode material has the advantages of high mass specific capacity, low cost, good thermal stability, high energy density and the like, and is widely applied to the fields of digital electronic products, electric tools, electric bicycles and the like. The ternary material is prepared by mixing a ternary precursor and a lithium source and then sintering at high temperature. Nickel cobalt manganese hydroxide is a widely used ternary precursor material with a chemical general formula of Ni_xCo_yMn_z(OH)₂Specifically, nickel salt, cobalt salt and manganese salt are used as raw materials, and the synthesis is carried out by adjusting the specific dosage ratio (x: y: z) of nickel, cobalt and manganese according to actual needs. On the basis of ternary materials, binary or multi-element materials and the like are continuously developed, and modification processes such as doping and cladding are continuously optimized.

In the development or production and manufacturing process of the precursor of the binary, ternary or multi-element cathode material of the lithium ion battery, the precursor needs to be washed, the washing needs to control the condition factors such as temperature, alkali amount, alkali concentration, water amount and the like, the precursor is generally stirred and filtered under the water bath condition, and the materials with higher washing requirements can be subjected to solution transfer and filtering for many times, so that the washing cleanliness is improved.

Disclosure of Invention

Aiming at the problems, the invention provides a precursor washing device, which has a simple structure, can directly wash the precursor material to be washed after the mixing reaction, improves the washing efficiency and reduces the material loss.

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

a washing device for precursors comprises a bottom plate and a washing kettle body, wherein the washing kettle body comprises an upper shell and a transparent lower shell, the lower end of the upper shell is fixedly connected with the upper end of the lower shell in an inserting manner, a sealing assembly is arranged between the upper shell and the lower shell, a stirring assembly is arranged inside the upper shell, one end of the stirring assembly is driven by a first motor, the side wall of the upper shell is communicated with a liquid inlet pipe, the upper end of the upper shell is provided with a feed hopper, the first motor is arranged on one side of the feed hopper, the outer wall of the upper shell is connected with the bottom plate through a first telescopic assembly, the side wall of the lower shell is communicated with a liquid outlet pipe, electromagnetic valves are arranged on the liquid inlet pipe and the liquid outlet pipe, and the liquid outlet pipe is positioned on the upper shell and connected with the lower shell;

the outer wall of the lower shell is provided with a turnover mechanism, the turnover mechanism is connected with the bottom plate through a second telescopic assembly, a collecting assembly is arranged below the lower shell, and the collecting assembly is movably embedded on the upper surface of the bottom plate.

Furthermore, the lower extreme integrated into one piece of going up the casing has annular arch, the upper end of casing is seted up down and is supplied bellied one end male slot, seal assembly is located the inside of slot, the one end and the bellied outer wall laminating of fluid-discharge tube.

Furthermore, the sealing assembly comprises an annular sealing ring, one side of the sealing ring is fixed with one end of the protrusion, the depth of the slot is the sum of the protrusion height and the thickness of the sealing ring, the lower surface of the liquid discharge pipe is flush with the inner bottom of the slot, and the diameter of the liquid discharge pipe is half of the protrusion height.

Further, first flexible subassembly is provided with three groups, three groups angular distribution such as first flexible subassembly is in the outer wall of last casing, every group first flexible subassembly all includes backup pad and first electric putter, the upper surface mounting of first electric putter's base and bottom plate, the lower fixed surface of first electric putter's tailpiece of the piston rod and backup pad, one side of backup pad is fixed with the outer wall of last casing.

Furthermore, the second telescopic assemblies are arranged in two groups, the two groups of second telescopic assemblies are symmetrically arranged, the second telescopic assemblies are not overlapped with the first telescopic assemblies, each group of second telescopic assemblies comprises a second electric push rod and a supporting block, the turnover mechanism is installed on the supporting block, a base of the second electric push rod is fixed to the upper surface of the base plate, and a piston rod end of the second electric push rod is fixed to the lower surface of the supporting block.

Furthermore, the turnover mechanism comprises a connecting rod and a second motor, the connecting rod is rotatably connected to one side of the supporting block, one end of the connecting rod is fixed to the outer wall of the lower shell, and an output shaft of the second motor is connected with the other end of one of the connecting rods.

Further, the collection subassembly is including collecting the box, the mounting groove that supplies to collect the box installation is seted up to the upper surface of bottom plate, it is the setting of rectangle box body to collect the box, four turnings of collecting the box are the arc setting, one side outer wall of collecting the box is fixed with the handrail, the internal diameter length and the width of collecting the box all are greater than 2-3mm of shell diameter down.

Further, the interior bottom of mounting groove inlays and is equipped with a plurality of round bars, the both ends of round bar rotate with the lateral wall of mounting groove to be connected, and is a plurality of the round bar is and sets up side by side, the upper surface of round bar surpasss the 1mm of mounting groove bottom at least, collect the top that the box is located a plurality of round bars.

Further, the stirring subassembly includes pivot and puddler, the one end of pivot is rotated and is connected at the top of last casing, just the one end of pivot is run through the top of last casing and is connected with the output shaft of first motor, the puddler is provided with two sets ofly, and is two sets of the puddler is and aligns the setting from top to bottom, every group the puddler all includes four L shape poles, the turning of L shape pole is the arc setting, four the puddler is the setting of equidistance.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the matching of the upper shell, the lower shell, the first telescopic component and the liquid discharge pipe, in the washing process, the liquid discharge pipe is shielded by the protrusion, so that the liquid discharge pipe is not communicated with the inside of the washing kettle body, the loss of liquid in the washing kettle is reduced, and according to the solution condition in the washing kettle body observed by the lower shell, after the raw materials are completely mixed, the stirring component stops working, the mixed solution is directly precipitated, the transfer of the mixed solution is not needed, and the washing efficiency of the precursor is improved.

2. According to the invention, through the matching of the sealing component, the upper shell and the lower shell, the sealing property of the connection of the upper shell and the lower shell is increased conveniently, and the overflow of liquid in the washing kettle body from the connection part of the upper shell and the lower shell is reduced.

3. According to the invention, through the matching of the second telescopic assembly and the lower shell, the lower shell can be driven to move upwards or downwards in the vertical direction according to the actual use requirement, and through the matching of the turnover mechanism and the lower shell, the lower shell can be driven to turn over for 180 degrees, so that the sediment in the lower shell can be conveniently poured out.

4. The upper and lower detachable structures of the invention are convenient to clean, and the service life of the washing kettle is prolonged.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

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 shows a schematic structural diagram according to an embodiment of the invention;

FIG. 2 shows a schematic diagram of an explosion structure of a washing tank body according to an embodiment of the invention;

FIG. 3 illustrates a schematic structural view of a base plate and collection assembly according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing an internal structure of an upper case according to an embodiment of the present invention;

FIG. 5 shows a schematic structural view of a stirring assembly according to an embodiment of the invention;

FIG. 6 illustrates a cross-sectional structural view of a base plate according to an embodiment of the present invention;

fig. 7 shows a schematic structural view of the lower housing after being turned over according to the embodiment of the invention.

In the figure: 1. a base plate; 2. washing the kettle body; 201. an upper housing; 202. a lower housing; 3. a liquid inlet pipe; 4. a feed hopper; 5. a first motor; 6. a support plate; 7. a first electric push rod; 8. a liquid discharge pipe; 9. a second electric push rod; 10. a support block; 11. a collection box; 12. mounting grooves; 13. a round bar; 14. a second motor; 15. a protrusion; 16. a seal ring; 17. a slot; 18. a handrail; 19. a connecting rod; 20. a rotating shaft; 21. a stirring rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a precursor washing device, which comprises a bottom plate 1 and a washing kettle body 2, wherein the washing kettle body 2 comprises an upper shell 201 and a transparent lower shell 202, the lower end of the upper shell 201 is fixedly connected with the upper end of the lower shell 202 in an inserting manner, a sealing assembly is arranged between the upper shell 201 and the lower shell 202, a stirring assembly is arranged inside the upper shell 201, one end of the stirring assembly is driven by a first motor 5, the side wall of the upper shell 201 is communicated with a liquid inlet pipe 3, the upper end of the upper shell 201 is provided with a feed hopper 4, the first motor 5 is arranged on one side of the feed hopper 4, the outer wall of the upper shell 201 is connected with the bottom plate 1 through a first telescopic assembly, the side wall of the lower shell 202 is communicated with a liquid discharge pipe 8, electromagnetic valves are respectively arranged on the liquid inlet pipe 3 and the liquid discharge pipe 8, and the liquid discharge pipe 8 is positioned at the connection position of the upper shell 201 and the lower shell 202;

tilting mechanism is installed to casing 202's outer wall down, tilting mechanism passes through the flexible subassembly of second and is connected with bottom plate 1, casing 202's below is provided with the collection subassembly down, the activity of collection subassembly is inlayed and is installed the upper surface at bottom plate 1, in the reaction, will go up casing 201 and casing 202 connection down, add material one in washing cauldron body 2 through feeder hopper 4, add material two in washing cauldron body 2 through feed liquor pipe 3, first motor 5 drives the stirring subassembly and mixes the raw materials in to washing cauldron body 2, accelerate the mixing rate of thick liquids, observe the inside raw materials mixing situation of washing cauldron body 2 through casing 202 down, after the raw materials mixes completely, the stirring subassembly stop work, directly precipitate the solution after mixing, do not need to mix the liquid transfer, improve precursor cleaning efficiency to a certain extent.

Go up the lower extreme integrated into one piece of casing 201 and have annular arch 15, the one end male slot 17 that supplies protruding 15 is seted up to the upper end of casing 202 down, seal assembly is located slot 17's inside, the one end of fluid-discharge tube 8 and the outer wall laminating of arch 15, make the raw materials when taking place the reaction, shelter from fluid-discharge tube 8 through arch 15, make fluid-

discharge tube

8 and 2 inside incommunications of washing cauldron body, reduce the interior liquid loss of washing cauldron, improve the stability that the raw materials takes place the reaction in the washing cauldron body 2.

Seal assembly includes annular sealing washer 16, one side of sealing washer 16 is fixed with bellied 15 one end, the degree of depth of slot 17 is the sum of bellied 15 height and sealing washer 16 thickness, the lower surface of fluid-discharge tube 8 and the interior bottom parallel and level of slot 17, the diameter of fluid-discharge tube 8 is the half of bellied 15 height, when sealing washer 16 removed the interior bottom of slot 17, shelter from fluid-discharge tube 8 through bellied 15 and make fluid-discharge tube 8 and last casing 201 inside not communicate, reduce the interior liquid loss of washing cauldron, when sealing washer 16 removed to fluid-discharge tube 8 upper surface position, communicate fluid-discharge tube 8 and last casing 201 inside, be convenient for pass through fluid-discharge tube 8 with the liquid solution after the sediment and discharge.

The first telescopic assemblies are provided with three groups, the three groups of first telescopic assemblies are distributed on the outer wall of the upper shell 201 at equal angles, each group of first telescopic assemblies comprises a supporting plate 6 and a first electric push rod 7, the base of the first electric push rod 7 is fixed with the upper surface of the bottom plate 1, the piston rod end of the first electric push rod 7 is fixed with the lower surface of the supporting plate 6, one side of the supporting plate 6 is fixed with the outer wall of the upper shell 201, the upper shell 201 is driven to move upwards or downwards in the vertical direction by the first electric push rod 7, the solution sedimentation condition in the washing kettle body 2 is observed by the lower shell 202, when obvious layering occurs in the lower shell 202, the upper shell 201 is driven to move upwards by the first electric push rod 7, the liquid discharge pipe 8 is communicated with the interior of the washing kettle body 2, the electromagnetic valve on the liquid discharge pipe 8 is opened, so that the liquid in the washing kettle body 2 can be discharged conveniently, after the liquid is discharged, first flexible subassembly continues to drive casing 201 rebound, makes casing 201 and casing 202 complete separation down, drives casing 202 rebound through the flexible subassembly of second, makes to exist sufficient upset distance between casing 202 and the bottom plate 1 down, and casing 202 overturns under the rethread tilting mechanism drives, is convenient for empty the inside precipitate of casing 202 down, and the rethread collection subassembly is collected.

The flexible subassembly of second is provided with two sets ofly, the flexible subassembly of two sets of second is the symmetry setting, and the flexible subassembly of second does not coincide with first flexible subassembly, the flexible subassembly of every group second all includes second electric putter 9 and supporting shoe 10, tilting mechanism installs on supporting shoe 10, the base of second electric putter 9 and the upper surface mounting of bottom plate 1, the lower fixed surface of 9 tailpieces of the piston rod ends of second electric putter and supporting shoe 10, drive down through second electric putter 9 and upwards or the downstream of the vertical direction of casing 202, be convenient for make down have sufficient upset space between casing 202 and the bottom plate 1.

Tilting mechanism includes connecting rod 19 and second motor 14, connecting rod 19 rotates and connects in one side of supporting shoe 10, the one end of connecting rod 19 is fixed with the outer wall of casing 202 down, the output shaft of second motor 14 is connected with the other end of one of them connecting rod 19, drive connecting rod 19 through second motor 14 and rotate, make connecting rod 19 drive down casing 202 use connecting rod 19 to carry out 180 upsets as the center, be convenient for shift the inside precipitate of casing 202 down, be convenient for carry out subsequent processing to the precipitate.

The collection assembly comprises a collection box 11, a mounting groove 12 for installing the collection box 11 is formed in the upper surface of the bottom plate 1, the collection box 11 is arranged in a rectangular box body, four corners of the collection box 11 are arranged in an arc shape, a handrail 18 is fixed to the outer wall of one side of the collection box 11, the inner diameter length and the width of the collection box 11 are larger than 2-3mm of the diameter of the lower shell 202, the sediment inside the straight shell is collected through the collection box 11, the collection box 11 is drawn out from the mounting groove 12 through the handrail 18, and the sediment inside the collection box 11 is convenient to process.

The interior bottom of mounting groove 12 is inlayed and is equipped with a plurality of round bars 13, the both ends of round bar 13 rotate with the lateral wall of mounting groove 12 and be connected, a plurality of round bars 13 are and set up side by side, the upper surface of round bar 13 surpasss the 1mm of mounting groove 12 bottom at least, collect the top that box 11 is located a plurality of round bars 13, when collecting box 11 and inserting or take out the collection box, the bottom of collecting box 11 drives round bar 13 and rotates, reduce the frictional force of collecting box 11 and mounting groove 12 bottom through pivoted round bar 13, be convenient for collect the installation of box 11 and take out.

Stirring assembly includes pivot 20 and puddler 21, the one end of pivot 20 is rotated and is connected the top at last casing 201, and the one end of pivot 20 runs through the top of last casing 201 and the output shaft of first motor 5, puddler 21 is provided with two sets ofly, two sets of puddler 21 are the setting of lining up from top to bottom, every puddler 21 of group all includes four L shape poles, the turning of L shape pole is the arc setting, four puddlers 21 are the setting of equidirectional degree, it rotates to drive pivot 20 through first motor 5, pivot 20 drives puddler 21 and removes, be convenient for stir the solution in the scrubbing kettle body 2, improve precursor washing speed.

The use method of the washing device based on the precursor is as follows:

s1, driving the upper shell to move downwards by the first electric push rod, so that the liquid discharge pipe is not communicated with the interior of the washing kettle body;

s2, adding washing raw materials into the washing kettle body through a liquid inlet pipe or a feed hopper, and driving a stirring assembly to rotate by a first motor to mix the raw materials to obtain a mixed liquid to be precipitated;

s3, turning off the first motor to stop the stirring action of the stirring component, and precipitating the mixed liquid to obtain a precipitate to be separated and a solution;

s4, the first telescopic assembly drives the upper shell to move upwards, so that the liquid discharge pipe is communicated with the interior of the washing kettle, the electromagnetic valve on the liquid discharge pipe is opened, and liquid is discharged to obtain a precipitate;

s5, if the cleaning is needed, repeating the steps S2-S3 until the cleaning effect meets the requirement;

s6, driving the lower shell to move upwards through the second telescopic component, driving the lower shell to turn 180 degrees through the turning component, and discharging sediments in the lower shell;

and S7, collecting sediments inside the lower shell through the collection assembly.

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.

Claims

1. The utility model provides a washing device of precursor, includes bottom plate (1) and washing cauldron body (2), its characterized in that: the washing kettle body (2) comprises an upper shell (201) and a transparent lower shell (202), the lower end of the upper shell (201) is fixedly inserted into the upper end of the lower shell (202), a sealing assembly is arranged between the upper shell (201) and the lower shell (202), a stirring assembly is arranged inside the upper shell (201), one end of the stirring assembly is driven by a first motor (5), the side wall of the upper shell (201) is communicated with a liquid inlet pipe (3), the upper end of the upper shell (201) is provided with a feed hopper (4), the first motor (5) is arranged on one side of the feed hopper (4), the outer wall of the upper shell (201) is connected with a bottom plate (1) through a first telescopic assembly, the side wall of the lower shell (202) is communicated with a liquid outlet pipe (8), and electromagnetic valves are arranged on the liquid inlet pipe (3) and the liquid outlet pipe (8), the liquid discharge pipe (8) is positioned at the joint of the upper shell (201) and the lower shell (202);

the outer wall of the lower shell (202) is provided with a turnover mechanism, the turnover mechanism is connected with the bottom plate (1) through a second telescopic assembly, a collecting assembly is arranged below the lower shell (202), and the collecting assembly is movably embedded on the upper surface of the bottom plate (1).

2. A precursor washing apparatus according to claim 1, wherein: go up the lower extreme integrated into one piece of casing (201) and have annular arch (15), the one end male slot (17) that supply protruding (15) are seted up to the upper end of casing (202) down, seal assembly is located the inside of slot (17), the one end of fluid-discharge tube (8) and the outer wall laminating of arch (15).

3. A precursor washing apparatus according to claim 2, wherein: the sealing assembly comprises an annular sealing ring (16), one side of the sealing ring (16) is fixed to one end of the protrusion (15), the depth of the slot (17) is the sum of the height of the protrusion (15) and the thickness of the sealing ring (16), the lower surface of the liquid discharge pipe (8) is flush with the inner bottom of the slot (17), and the diameter of the liquid discharge pipe (8) is half of the height of the protrusion (15).

4. A precursor washing apparatus according to claim 1, wherein: first flexible subassembly is provided with three groups, three groups angular distribution such as first flexible subassembly is at the outer wall of last casing (201), every group first flexible subassembly all includes backup pad (6) and electric putter (7), the last fixed surface of the base of electric putter (7) and bottom plate (1), the tailpiece of the piston rod of electric putter (7) and the lower fixed surface of backup pad (6), one side of backup pad (6) is fixed with the outer wall of last casing (201).

5. A precursor washing apparatus according to claim 1, wherein: the two groups of second telescopic assemblies are symmetrically arranged and do not coincide with the first telescopic assembly, each group of second telescopic assemblies comprises a second electric push rod (9) and a supporting block (10), the turnover mechanism is installed on the supporting block (10), the base of the second electric push rod (9) is fixed to the upper surface of the base plate (1), and the piston rod end of the second electric push rod (9) is fixed to the lower surface of the supporting block (10).

6. A precursor washing apparatus according to claim 5, wherein: the turnover mechanism comprises a connecting rod (19) and a second motor (14), the connecting rod (19) is rotatably connected to one side of the supporting block (10), one end of the connecting rod (19) is fixed to the outer wall of the lower shell (202), and an output shaft of the second motor (14) is connected with the other end of one connecting rod (19).

7. A precursor washing apparatus according to claim 1, wherein: the collection subassembly is including collecting box (11), mounting groove (12) that supply to collect box (11) installation are seted up to the upper surface of bottom plate (1), it is the setting of rectangle box body to collect box (11), four turnings of collecting box (11) are the arc setting, one side outer wall of collecting box (11) is fixed with handrail (18), the internal diameter length and the width of collecting box (11) all are greater than 2-3mm of casing (202) diameter down.

8. A precursor washing apparatus according to claim 7, wherein: the interior bottom of mounting groove (12) is inlayed and is equipped with a plurality of round bars (13), the both ends of round bar (13) are rotated with the lateral wall of mounting groove (12) and are connected, and are a plurality of round bar (13) are and set up side by side, the upper surface of round bar (13) surpasss mounting groove (12) bottom 1mm at least, collect box (11) and be located the top of a plurality of round bars (13).

9. A precursor washing apparatus according to claim 1, wherein: stirring assembly includes pivot (20) and puddler (21), the one end of pivot (20) is rotated and is connected the top at last casing (201), just the one end of pivot (20) runs through the top of last casing (201) and the output shaft of first motor (5), puddler (21) are provided with two sets ofly, and are two sets of puddler (21) are the setting of lining up from top to bottom, every group puddler (21) all include four L shape poles, the turning of L shape pole is the arc setting, four puddler (21) are the setting of angle such as.