CN211190147U

CN211190147U - Reaction kettle for preparing precursor of lithium ion battery anode material

Info

Publication number: CN211190147U
Application number: CN201921421831.0U
Authority: CN
Inventors: 丁雪; 魏玲; 王瑞庆; 蔡碧博; 罗军; 闫世芳
Original assignee: Xinxiang Tianli Lithium Energy Co ltd
Current assignee: Xinxiang Tianli Lithium Energy Co ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-08-07
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a reaction kettle for preparing a precursor of a lithium ion battery anode material, which comprises a kettle body and a stirring device, wherein the top of the kettle body is provided with an air inlet pipe, and the end part of the air inlet pipe is arranged at the bottom of the kettle body; the kettle is characterized in that a baffle is longitudinally arranged on the inner wall of the kettle body, and the outer edge of the baffle is serrated. The utility model discloses a reaction kettle of lithium ion battery anode material precursor, through set up the intake pipe at the cauldron body top and lead to cauldron body bottom, let in gas bottom the reaction kettle through the intake pipe when using, gas lets in from the reaction kettle, makes to turn up reaction liquid from the bottom, makes the material can't stop at the dead angle of reaction kettle, makes the material mix more evenly; baffle that sets up on the reation kettle inner wall is again to the flow disturbance of material liquid, is favorable to the material misce bene, and the outward flange of cockscomb structure more is favorable to being in the liquid vortex of agitator stirring state on the baffle for the material liquid stirring in the reation kettle is more even, and the dispersibility is better.

Description

Reaction kettle for preparing precursor of lithium ion battery anode material

Technical Field

The utility model relates to a reation kettle especially relates to a reation kettle of preparation lithium ion battery cathode material precursor.

Background

The key material of the lithium ion battery is the anode material, which accounts for about 30% of the cost of the lithium ion battery, and the anode materials applied in the current market mainly comprise lithium cobaltate, ternary materials, lithium manganate, lithium iron phosphate and the like. The ternary material, namely the nickel cobalt lithium manganate material is a novel lithium battery anode material, has the advantages of high mass specific capacity, low cost, good thermal stability, high energy density and the like compared with other anode materials, and is widely applied to the fields of digital electronic products, electric tools, electric bicycles and the like. The existing reaction kettle for preparing the ternary precursor has structural defects, solid substances can be retained in a dead angle area of the reaction kettle when the reaction kettle is used, and the uniformity and the dispersibility of reactant liquid are poor.

SUMMERY OF THE UTILITY MODEL

The invention provides a reaction kettle which can uniformly mix material liquid in the reaction kettle and can more uniformly mix materials in a dead angle area of a kettle body of the reaction kettle.

The technical scheme of the utility model as follows:

a reaction kettle for preparing a precursor of a lithium ion battery anode material comprises a kettle body, wherein an air inlet pipe is arranged at the top of the kettle body, and the end part of the air inlet pipe is arranged at the bottom of the kettle body; the kettle is characterized in that a baffle is longitudinally arranged on the inner wall of the kettle body, and the outer edge of the baffle is serrated.

Preferably, a sliding chute is longitudinally fixed on the inner wall of the kettle body, a baffle outlet is arranged at the position where the top end of the sliding chute is connected with the top of the kettle body, the baffle outlet is larger than the maximum cross section of the baffle, and the baffle is slidably arranged in the sliding chute; the top end of the baffle is fixedly connected with a position adjusting device. The baffle outlet provides a displacement space for the baffle to slide when the baffle slides upwards so as to facilitate the baffle to extend out of the reaction kettle; the baffle can also be removed from the reaction kettle through the baffle outlet for cleaning or maintenance.

Preferably, the position adjusting device is a chain or a steel wire rope.

Preferably, the chutes and the baffles are 6 respectively and are uniformly distributed and arranged along the circumferential direction of the reaction kettle.

Preferably, the saw teeth on the baffle are arranged at equal intervals in the vertical direction.

Preferably, the intake pipe is plural.

Preferably, the end of the air inlet pipe is a bevel opening.

Preferably, reation kettle still includes agitating unit, agitating unit includes motor, (mixing) shaft and stirring vane, the motor is installed the top of the reation kettle cauldron body, the (mixing) shaft sets up the internal portion of cauldron and with the output of motor is connected, be provided with rectangle frame stirring vane on the (mixing) shaft.

Preferably, the frame type stirring blade is arranged in three pieces, and the included angle between the pieces is 120 degrees.

Preferably, the bottom of the reaction kettle is a flat bottom.

The utility model has the advantages that:

the utility model discloses a reation kettle of lithium ion battery cathode material precursor through being provided with the intake pipe at cauldron body top and leading to cauldron body bottom, lets in reation kettle bottom gas through the intake pipe when using, and gas lets in from reation kettle for upwards turn-up reaction liquid from the bottom, thereby make the material can't stop at reation kettle's dead angle, make the material mix more evenly. Baffle that sets up on the reation kettle inner wall rotates once more to the rotatory production disturbance of material feed liquid when rotatory at material liquid, is favorable to the material misce bene, and the outward flange of cockscomb structure on the baffle more is favorable to the liquid that is in the agitator stirring state to produce different radial vortex in reation kettle longitudinal direction to make the material liquid stirring in the reation kettle more even, the dispersibility is better.

Drawings

Fig. 1 is a schematic sectional view of the reaction kettle of the present invention.

Fig. 2 is a turbulent flow schematic diagram of the baffle plate during the operation of the reaction kettle.

In the figure: 1. a reaction kettle body; 2. a stirring device; 21. a motor; 22. a stirring shaft; 23. a stirring blade;

3. an air inlet pipe; 31. an inlet pipe port; 4. a baffle plate; 41. saw teeth; 5. a chute; 6. a baffle outlet; 7. and (4) an adjusting device.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Example 1

A schematic sectional view of a reaction kettle for preparing a precursor of a lithium ion battery anode material is shown in figure 1, and the reaction kettle comprises a kettle body 1 and a stirring device 2, wherein the top of the kettle body 1 is provided with an air inlet pipe 3, and the end part of the air inlet pipe 3 is arranged at the bottom of the kettle body 1; baffle 4 is vertically arranged on the inner wall of the kettle body 1, and the outer edge of the baffle 4 is in a sawtooth shape.

At the reation kettle during operation, agitating unit 2's motor 21 rotates and drives stirring vane 23 on the (mixing) shaft 22 and rotate, thereby make liquid and solid particle in the reation kettle rotate, liquid and solid particle that are rotating strike baffle 4 when rotating and produce and make liquid and solid particle turn back and produce the disturbance, as shown in fig. 2, make the material mix more even, the edge of 4 cockscomb structure of baffle makes the liquid that is in the agitator stirring state produce different radial liquid and solid particle rotation on reation kettle longitudinal direction and produce the turbulent flow, prevent that the material from rotating along with the stirring and forming the vortex, make liquid and solid material intensive mixing in the reation kettle. Meanwhile, at the bottom of the reaction kettle, gas (which can be compressed air or nitrogen) is introduced into the bottom of the reaction kettle, especially a dead angle area in the reaction kettle through the gas inlet pipe 3, so that bubbles generated by the gas agitate materials in the reaction kettle to turn over, the materials in the dead angle area in the reaction kettle flow and cannot be retained, the material and the liquid in the reaction kettle are uniformly mixed, and the dispersibility is better.

A chute 5 can be longitudinally and fixedly arranged on the inner wall of the reaction kettle body 1, as shown in fig. 1, a baffle outlet 6 is arranged at the position where the top end of the chute 5 is connected with the top of the kettle body 1, the baffle outlet 6 is larger than the maximum cross section of the baffle 4, and the baffle 4 can be slidably arranged in the chute 5; and the top end of the baffle 4 is fixedly connected with a position adjusting device 7. With baffle 4 setting in spout 5, can make baffle 4 slide from top to bottom in spout 5 through adjusting device 7's flexible to adjust the height of baffle 4 for the reation kettle body 1. Baffle height-adjustable's reation kettle like this can be according to the material height control baffle height of difference in the reation kettle that leads to because of the production demand of difference to make the material of different density, the reaction of different liquid level height all can obtain relatively even material and mix. The baffle outlet provides a displacement space for the baffle to slide when the baffle slides upwards so as to facilitate the baffle to extend out of the reaction kettle; the baffle can also be removed from the reaction kettle through the baffle outlet for cleaning or maintenance.

Adjusting device can be chain or wire rope, as long as can stimulate baffle 4 and reciprocate in the spout can, the chain can be stainless steel or PVC material to avoid there being other metallic impurity to introduce reation kettle.

The spout reaches the number of baffle can design as required, for example can design into each 6, and follow reation kettle circumference equipartition arranges. The serrations on the baffle 4 may be designed to be arranged at equal intervals in the vertical direction, but may be arranged at unequal intervals.

The air inlet pipe 3 may be provided as needed, one air inlet pipe may be provided, or a plurality of air inlet pipes may be provided.

Further, the port 31 of the intake 3 pipe is a bevel port. The gas outlet is the slope mouth for the exit area is bigger when gas overflows, and gas is more dispersed, and the material liquid in the dead angle region mixes more evenly.

Agitating unit can include motor 21, (mixing) shaft 22 and stirring vane 23, motor 2 is installed the top of the reation kettle cauldron body 1, the (mixing) shaft 22 sets up the cauldron body 1 is inside and is connected with motor 21's output, be provided with rectangular frame stirring vane 23 on the (mixing) shaft 22. Of course, the stirring blade may be shaped as a plate. Preferably, the frame-type stirring vane 23 is provided in three pieces, and the included angle between the pieces is 120 °. The bottom of the reaction kettle body 1 is preferably flat, so that the frame type stirring blades 23 can be as close as possible to the reaction kettle under the condition of non-contact, and the gaps between the stirring blades and the kettle bottom are smaller, so that the material liquid is stirred more uniformly.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A reaction kettle for preparing a precursor of a lithium ion battery anode material comprises a kettle body and is characterized in that an air inlet pipe is arranged at the top of the kettle body, and the end part of the air inlet pipe is arranged at the bottom of the kettle body; the inner wall of the kettle body is longitudinally provided with a baffle, and the outer edge of the baffle is serrated; a sliding groove is longitudinally fixed on the inner wall of the kettle body, a baffle outlet is arranged at the position where the top end of the sliding groove is connected with the top of the kettle body, the baffle outlet is larger than the maximum cross section of the baffle, and the baffle is slidably arranged in the sliding groove; the top end of the baffle is fixedly connected with a position adjusting device.

2. The reaction kettle for preparing the precursor of the lithium ion battery cathode material according to claim 1, wherein the position adjusting device is a chain or a steel wire rope.

3. The reaction kettle for preparing the precursor of the positive electrode material of the lithium ion battery according to claim 1, wherein the number of the chutes and the baffles is 6 respectively, and the chutes and the baffles are uniformly distributed along the circumferential direction of the reaction kettle.

4. The reaction kettle for preparing the precursor of the lithium ion battery cathode material according to claim 1, wherein the sawteeth on the baffle are arranged at equal intervals in the vertical direction.

5. The reaction kettle for preparing the precursor of the lithium ion battery positive electrode material according to claim 1, wherein the number of the gas inlet pipes is multiple.

6. The reaction kettle for preparing the precursor of the positive electrode material of the lithium ion battery according to claim 1, wherein a port of the gas inlet pipe is an inclined port.

7. The reaction kettle for preparing the precursor of the lithium ion battery cathode material according to claim 1, further comprising a stirring device, wherein the stirring device comprises a motor, a stirring shaft and a stirring blade, the motor is installed at the top of the reaction kettle body, the stirring shaft is arranged inside the kettle body and connected with an output end of the motor, and a rectangular frame type stirring blade is arranged on the stirring shaft.

8. The reaction kettle for preparing the precursor of the positive electrode material of the lithium ion battery according to claim 7, wherein the frame type stirring blade is arranged in three pieces, and the included angle between each piece is 120 degrees.

9. The reaction kettle for preparing the precursor of the lithium ion battery cathode material according to claim 8, wherein the bottom of the reaction kettle is flat.