KR101511705B1 - Device for manufacturing anode active material for lithium battery - Google Patents

Abstract

And a mixer for mixing at least one or more kinds of raw materials constituting the cathode active material of the secondary battery so as to mix the different materials constituting the cathode active material more efficiently, Wherein the agitating unit includes a circulation line connected to the container for transferring the raw material, a jetting unit connected to the circulation line and disposed in the container for jetting and mixing the raw material, And a supply part for supplying the raw material to the spray part through the line at a high pressure. The present invention also provides an apparatus for manufacturing a manganese based positive electrode active material for a lithium secondary battery.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for producing a manganese-based positive electrode active material for a lithium secondary battery,

The present invention relates to an apparatus for producing a manganese-based cathode active material for a lithium secondary battery. More particularly, the present invention relates to an apparatus for producing a manganese-based cathode active material for a lithium secondary battery so as to more uniformly mix the manganese-based cathode active material.

In general, a manganese-based cathode active material for a lithium secondary battery is manufactured by weighing each raw material, mixing each raw material as uniformly as possible, and heating (calcining) and pulverizing the mixed raw material.

The process of mixing the raw materials in detail includes a step of pulverizing the raw materials using a bead mill and preparing a desired precursor by using a spray dryer. However, when a pulverizer and a dryer are used, a considerable amount of wastewater is generated, and the cost of the high energy increases, thereby increasing the unit price of the cathode active material.

To solve this problem, a water-free dry process can be applied. In the dry process, the water is not used in the mixing process, and the raw materials are mixed in the mixer, which is advantageous in that no waste water is generated and the cost can be saved at low energy cost.

In the lithium secondary battery, the final performance of the cathode material depends on the degree of mixing of lithium and manganese, which are different materials constituting the cathode active material. Therefore, the mixing technique of the raw materials in the production of the cathode active material is a very important factor that determines the performance of the battery.

There is provided a device for manufacturing a manganese-based cathode active material for a lithium secondary battery, which can more efficiently mix heterogeneous raw materials constituting a cathode active material.

The apparatus according to the present embodiment includes a mixer for mixing at least one kind of raw material constituting a cathode active material of a secondary battery, wherein the mixer includes a container in which raw materials are accommodated and mixed, and a stirring portion provided in the container for stirring the raw materials Wherein the agitating portion includes a circulation line connected to the container and fed with the raw material, a spraying portion connected to the circulation line and disposed in the container for spraying and mixing the raw material, As shown in FIG.

The stirring portion may further include a stirring blade disposed in the vessel and stirring the raw material, and a driving motor coupled to the stirring blade to rotate the stirring blade.

The supply unit may include a gas line connected to the transfer line, a gas supply unit for supplying high-pressure gas to the circulation line through the gas line, and a control valve installed in the gas line.

The injection unit may include a main pipe connected to the circulation line and extending to the inside of the container, and at least one or more nozzles connected to the main pipe to inject raw material into the container.

The injection unit may further include a discharge pipe installed at an upper end of the container to discharge gas introduced into the container.

Further comprising a rotating member installed on a side surface of the main tube and communicating with the main tube, a rotating member rotatably installed on the rotating shaft and communicating with the main tube, It may be a structure in which the nozzle rotates the rotary member with respect to the pipe and the raw material is sprayed.

The main pipe is divided into two main pipes and the separated main pipe is rotatably coupled to the main pipe, the rotating member is installed on the side of the main pipe, and the main pipe is rotated And the nozzle may inject the raw material.

The spraying unit may further include a guide tube installed in the vessel and having the main tube slidably installed therein, and a driving cylinder connected to the guide tube to move the main tube, And may be a structure for vertically moving the installed nozzles inside the container.

The agitating unit may further include a gas injecting unit installed at one side of the vessel to inject gas to the raw material in the vessel to stir the raw material.

The gas injection unit may include a gas nozzle installed inside the container, a gas supply unit supplying gas through a supply line connected to the gas nozzle, and a control valve installed in the supply line.

The gas may be air.

According to the embodiment of the present invention, the heterogeneous raw materials constituting the cathode active material can be mixed more uniformly and uniformly, so that the performance of the cathode material can be improved and the quality of the product can be improved and uniformed.

In addition, it is possible to manufacture a more excellent cathode active material, thereby making it possible to manufacture a secondary battery with improved performance.

1 is a schematic view showing an apparatus for producing a manganese-based cathode active material for a lithium secondary battery according to an embodiment of the present invention.
FIG. 2 is a view showing a detailed configuration of a part of the apparatus for producing a manganese-based cathode active material for a lithium secondary battery according to the present embodiment.
3 is a schematic view for explaining the operation of the apparatus for producing a manganese-based cathode active material for a lithium secondary battery according to the present embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

In the following description, the positive electrode active material refers to a material used for manufacturing a positive electrode material of a secondary battery. In this embodiment, an apparatus for producing a positive electrode active material for a lithium secondary battery is described as an example. The manufacturing apparatus of this embodiment is not limited to the manganese-based cathode active material, and can be applied to various cathode active materials for various batteries.

FIG. 1 illustrates a manganese-based cathode active material manufacturing apparatus for a lithium secondary battery according to an embodiment of the present invention, and FIG. 2 illustrates the structure of the injection unit in the manufacturing apparatus in detail.

The manufacturing apparatus of this embodiment includes a mixer 100 capable of more uniformly mixing the raw material manganese and lithium.

As shown in FIG. 1, the mixer 100 includes a container 10 in which a raw material is received and mixed, and a stirring portion installed in the container 10 to stir the raw material.

The stirring portion includes a stirring blade 20 disposed in the vessel 10 and stirring the raw material and a driving motor 22 connected to the stirring blade 20 to rotate the stirring blade 20. [

The container 10 is filled with manganese and lithium as raw materials therein. A supply port and an outlet port for discharging the raw material supplied or mixed into the container 10 may be further formed at one side of the container 10. In the present embodiment, the stirring vane 20 is disposed at the bottom of the vessel 10. When the drive motor 22 is operated, the stirring vane 20 connected to the drive motor 22 rotates in the vessel 10. As the stirring blade 20 rotates, manganese and lithium, which are raw materials contained in the vessel 10, are mixed.

The mixer 100 can mix the raw material more uniformly by injecting gas into the vessel 10 in addition to the raw material mixing structure by the stirring vane 20. [

To this end, the stirring part further includes a gas spraying part 30 installed at one side of the container 10 to spray the raw material in the container 10 to stir the raw material. The gas injection unit 30 includes a gas nozzle 32 installed in the vessel 10 and a gas supply unit 36 for supplying gas through a supply line 34 connected to the gas nozzle 32 And a control valve 38 installed in the supply line 34.

In this embodiment, the gas may be air. The gas nozzle 32 may be disposed at the upper end of the vessel 10 and blow out air toward the lower end of the vessel 10. The gas nozzle 32 can be installed at various positions in the vessel 10 and is not particularly limited.

The gas supply unit 36 supplies high-pressure air through a supply line 34. The gas supply unit 36 may include, for example, a compression pump and a compression tank in which high-pressure air is stored. The control valve 38 provided at one side of the supply line 34 selectively opens and closes the supply line 34 to cut off the supply of air.

Thus, when the control valve 38 is opened, the high-pressure air supplied from the gas supply unit 36 is injected into the vessel 10 through the gas nozzle 32 connected to the supply line 34. The high-pressure air injected from the gas nozzle 32 acts to mix and mix the raw materials contained in the vessel 10. Therefore, in the mixer 100, the high-pressure air injected from the gas nozzle 32 together with the stirring vane 20 rotated by the driving motor 22 causes a synergistic effect of mixing the raw materials, .

A discharge pipe 40 for discharging the air injected from the gas nozzle 32 into the vessel 10 is further provided at the upper end of the vessel 10. The air introduced into the container 10 is moved upward in the container 10 and discharged to the outside through the discharge pipe 40.

In the present embodiment, the mixer 100 has a structure in which the raw material is injected at a high pressure in the vessel 10 so as to mix the raw materials more uniformly. The agitating unit may include a circulation line 50 connected to the vessel 10 to feed the raw material and a spraying unit 50 connected to the circulation line 50 and disposed in the vessel 10 for spraying and mixing raw materials. (60), and a supply unit for supplying raw material to the jetting unit (60) at high pressure through the circulation line (50).

In this embodiment, the jetting section 60 is disposed at the upper part of the vessel 10, and the circulation line 50 is connected to the lower part of the vessel 10 and extends to the upper part of the vessel 10, . The raw materials accommodated in the container 10 are introduced into the circulation line 50 connected to the bottom of the container 10 according to the driving of the supply unit and circulated through the jetting unit 60 into the container 10. On the side of the circulation line (50), an on / off valve (52) for blocking movement of the raw material may be installed.

The supply unit is structured to use gas pressure. The supply section includes a gas line 54 connected to a circulation line 50 and a gas supply 36 for supplying a high pressure gas to the circulation line 50 through the gas line 54, As shown in Fig. In this embodiment, the gas supplied from the supply portion may be air. When air is used as the gas in the supply part, the gas supply part 36 of the supply part is not separately provided and the gas supply part 36 of the gas injection part 30 mentioned above can be used. The gas line 54 of the supply part is connected to the gas supply part 36 of the gas injection part 30 and can receive high pressure air from the gas supply part 36.

When high pressure air is supplied to the circulation line 50 from the gas supply unit 36 through the gas line 54, the raw material is pressure-fed to the jetting unit 60 by the air pressure and supplied to the inside of the vessel 10 through the jetting unit 60 / RTI > In this way, by circulating the raw material in the vessel 10 and circulating it, it becomes possible to mix the raw material more uniformly.

The gas introduced into the vessel 10 during the raw material injection process is discharged through the discharge pipe 40 provided at the upper end of the vessel 10.

Fig. 2 illustrates the structure of the jetting section 60 for jetting the raw material supplied at a high pressure through the circulation line 50. Fig.

2, the jetting unit 60 includes a main pipe 62 connected to the circulation line 50 and extending to the inside of the container 10, and a main pipe 62 connected to the main pipe 62, And at least one or more nozzles (61) for spraying the raw material into the nozzle (10).

In the present embodiment, the nozzle 61 has a structure in which the raw material is injected into the container 10 while rotating with respect to the main pipe 62. The jetting unit 60 includes a rotation shaft 65 installed on the side of the main tube 62 and communicating with the main tube 62 and a main tube 62 rotatably installed on the rotation shaft 65, And a rotary member 66 provided on the outer circumferential surface of the nozzle 61 so as to be spaced apart from the nozzle 61.

2, the axial direction of the main pipe 62 is referred to as the z-axis, and the axial direction of the nozzle 61 provided on the side of the main pipe 62 is referred to as the x-axis. Accordingly, the rotary member 66 rotates about the x-axis, and the nozzle 61 provided on the rotary member 66 injects the raw material.

The rotating shaft 65 is installed on the lower side surface of the main pipe 62 in the x-axis direction. The rotary member 66 is rotatably mounted on the rotary shaft 65 about the x-axis. A bearing block may be further provided between the rotary shaft 65 and the rotary member 66 for smooth rotation. In order to prevent the leakage of the raw material, the two members are sufficiently sealed.

The driving force for the rotation of the rotary member 66 can be obtained by the injection pressure of the raw material jetted through the nozzle 61. For example, the nozzle 61 may be eccentrically installed at a center line passing through the center of the rotary member 66. Accordingly, when the raw material is injected through the nozzle 61 that is off the center of the rotary member 66, a rotational moment is applied to the rotary member 66 by the injection force of the raw material. Therefore, the rotating member 66 rotates around the rotating shaft 65. [

The rotation of the rotary member 66 may be performed by various methods other than the above-described structure. In the case of the structure in which the nozzle 61 is circularly moved according to the rotation of the rotary member 66 and the raw material is sprayed, It belongs to the true spirit.

By thus circularly moving the nozzle 61, the raw material jetted through the nozzle 61 is uniformly jetted into the entire yz plane in the vessel 10 as shown in Fig. Therefore, it becomes possible to mix the raw material more evenly.

In addition, the jetting unit 60 has a structure for jetting the raw material while circularly moving the nozzle 61 around the z-axis.

The lower main pipe 64 is rotatably coupled to the upper main pipe 63 and the rotation member 66 is connected to the upper main pipe 63. The lower main pipe 64, Is provided on the side surface of the lower main pipe 64 so that the lower main pipe 64 rotates with respect to the upper main pipe 63 and the nozzle 61 injects the raw material.

The nozzle 61 is installed in the lower main pipe 64. That is, the rotary shaft 66 is provided on the side surface of the lower main pipe 64 and the rotary member 66 provided with the nozzle 61 is coupled to the lower main pipe 64.

Between the upper main pipe 63 and the lower main pipe 64, a bearing block for smooth rotation may be further provided. In order to prevent leakage of the raw material, the two members are sufficiently sealed.

Thus, the lower main pipe 64, in which the nozzle 61 is provided, is rotated about the z-axis with respect to the fixed upper main pipe 63. [ Therefore, the nozzle 61 installed in the lower main pipe 64 circularly moves about the z-axis and injects the raw material into the entire xy plane in the vessel 10.

The driving force for rotation of the lower main pipe 64 can be obtained by the injection pressure of the raw material injected through the nozzle 61. The nozzle 61 is disposed eccentrically from the center line passing through the center of the main pipe 62. When the raw material is injected through the nozzle 61, a rotational moment is applied to the lower main pipe 64 by the injection force of the raw material. Therefore, the lower main pipe 64 rotates around the upper main pipe 63. [

The rotation of the lower main pipe 64 may be performed by various methods other than the structure described above. In the case of the structure in which the raw material is sprayed while the nozzle 61 is circularly moved in accordance with the rotation of the lower main pipe 64, It belongs to the true spirit of invention.

As described above, the nozzle 61 for spraying the raw material in this embodiment circularly moves around the x-axis by rotation of the lower main tube 64 simultaneously with the rotation of the rotary member 66, The raw material is uniformly injected into the inside of the reactor 10.

In addition, the jetting unit 60 has a structure for vertically moving the nozzle 61 inside the container 10 to mix the raw material more uniformly.

The spray unit 60 includes a guide pipe 67 installed in the vessel 10 and having the main pipe 62 slidably installed therein and a guide pipe 67 installed in the guide pipe 67, And a driving cylinder (68) connected to the tube (62) for moving the main tube (62).

The guide pipe (67) extends through the upper end of the container (10) and extends inside. A drive cylinder 68 is installed at the upper end of the guide tube 67. The main pipe 62 is installed inside the guide pipe 67 so as to be slidable up and down while maintaining airtightness.

The piston rod of the drive cylinder 68 extends into the guide tube 67 and is coupled to the upper end of the main tube 62. When the drive cylinder 68 is expanded and contracted, the main pipe 62 connected to the piston rod is moved up and down along the guide pipe 67.

A circulation line (50) for supplying a raw material to the main pipe (62) is connected to the upper end of the main pipe (62). A slit 69 guiding the circulation line 50 is provided on the side surface of the guide pipe 67 so as to prevent interference between the guide pipe 67 and the circulation line 50 when the main pipe 62 ascends / .

The main tube 62 is moved up and down in the z-axis direction by the driving and driving of the drive cylinder 68. The nozzle 61 provided in the main tube 62 also moves up and down along the z axis to spray the raw material do. Therefore, by injecting the raw material from the upper part to the lower part inside the vessel 10, it becomes possible to mix the raw material more evenly.

3, the mixer 100 according to the present embodiment mixes the raw materials evenly by driving the stirring vanes 20, the gas nozzles 32 and the nozzles 61 provided in the vessel 10, .

In the present embodiment, the stirring blade 20 provided inside the vessel 10 agitates the raw material as a whole through the rotational force. In this process, the gas nozzle 32 installed above the vessel 10 injects air into the raw material contained in the vessel 10 to double the mixing action of the raw materials.

Further, in addition to the raw material mixing operation through the air injection, the nozzle 61 injects the raw material supplied through the circulation line 50 in the vessel 10 to mix the raw material more evenly. The raw material spraying direction of the nozzle 61 is not limited to one place, but extends over the entire inner surface of the container 10.

As shown in FIG. 3, the nozzle 61 rotates around the x-axis and the lower main tube 64 with the nozzle 61 rotates around the z-axis. Thus, the nozzle 61 rotates along the x-axis and the z-axis in the vessel 10, and uniformly distributes the raw material to the entire vessel 10.

Further, since the main pipe 62 provided with the nozzle 61 moves up and down along the z-axis, the raw material can be uniformly sprayed along the upper and lower portions of the vessel 10.

As described above, the mixer 100 of the present embodiment is configured such that the rotational force of the stirring vane 20, the air injected from the gas nozzle 32, and the high-pressure raw material uniformly sprayed all over the inside of the container 10, Can be mixed more uniformly.

The present invention has been described above with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments falling within the scope of the present invention are possible by those skilled in the art.

10: vessel 20: stirring blade
22: drive motor 30: gas injection part
32: gas nozzle 34: supply line
36: gas supply unit 40:
50: circulation line 54: gas line
60: jetting part 61: nozzle
62: main tube 65: rotating shaft
66: rotating member 67: guide tube
68: drive cylinder 69: slit

Claims (11)

And a mixer for mixing at least one or more kinds of raw materials constituting a cathode active material of the secondary battery, wherein the mixer comprises a container for containing and mixing the raw materials, and a stirring part installed in the container for stirring the raw materials,
The agitating unit includes a circulation line connected to the container and fed with the raw material, a spraying unit connected to the circulation line and disposed in the container for spraying and mixing the raw material, And a supply unit for supplying the positive electrode active material to the lithium secondary battery. The method according to claim 1,
Wherein the injector includes a main pipe connected to the circulation line and extending to the inside of the container, and at least one nozzle connected to the main pipe to inject raw material into the container. 3. The method of claim 2,
Wherein the stirring unit further includes a stirring blade disposed in the vessel and stirring the raw material, and a driving motor connected to the stirring blade to rotate the stirring blade. The method according to claim 2 or 3,
Wherein the agitating portion further comprises a gas injecting portion provided at one side of the vessel to inject gas into the raw material in the vessel to agitate the raw material. 5. The method of claim 4,
Wherein the supply unit includes a gas line connected to a transfer line, a gas supply unit supplying a high-pressure gas to the circulation line through the gas line, and a control valve installed in the gas line. 6. The method of claim 5,
Wherein the gas injection unit includes a gas nozzle provided inside the vessel, a gas supply unit supplying gas through a supply line connected to the gas nozzle, and a control valve installed in the supply line. The method according to claim 6,
And a discharge pipe installed at an upper end of the vessel for discharging gas introduced into the vessel. 8. The method of claim 7,
Wherein the gas is air. 5. The method of claim 4,
Further comprising a rotating member installed on a side surface of the main tube and communicating with the main tube, a rotating member rotatably installed on the rotating shaft and communicating with the main tube, Wherein the rotating member rotates with respect to the pipe and the nozzle injects the raw material. 10. The method of claim 9,
The main pipe is divided into two main pipes and the separated main pipe is rotatably coupled to the main pipe, the rotating member is installed on the side of the main pipe, and the main pipe is rotated And a nozzle injects the raw material. The apparatus for producing a manganese-based cathode active material for a lithium secondary battery according to claim 1, 11. The method of claim 10,
The spraying unit may further include a guide tube installed in the vessel and having the main tube slidably installed therein, and a driving cylinder connected to the guide tube to move the main tube, A manganese-based cathode active material manufacturing apparatus for a lithium secondary battery having a structure in which installed nozzles are vertically moved in a container.

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