Continuous flow multi-frequency dispersing device

Abstract

The present invention relates to a continuous flow multi-ultrasonic dispersion device capable of continuously and repeatedly dispersing CNT conductive materials by outputting ultrasound of multiple bands.

Description

Technology Field

[0001] The present invention relates to a continuous flow multi-frequency distribution device. Background Technology

[0002] The materials (composite) constituting the electrodes (anode or cathode) of a secondary battery consist of an active material, a binder, and a conductive agent. The conductive agent is an additive material that plays a crucial role in improving the performance of the secondary battery, as it promotes electron movement within the anode and cathode, even though it is used in only a small amount.

[0003] While carbon black is primarily used as a conductive material, various carbon materials such as conducting graphite or carbon nanotubes (CNT) are recently being developed and applied.

[0004] Among them, CNTs are graphite sheets rolled into a cylindrical shape with a nanometer-sized diameter, and their electrical conductivity is similar to that of copper.

[0005] The diameter of CNTs is only a few to tens of nanometers, and CNTs are classified into single-walled carbon nanotubes (SWCNTs) or multi-walled carbon nanotubes (MWCNTs) depending on the number of walls.

[0006] Since these CNTs have the characteristic of an elongated one-dimensional (1D) structure, when used as a conductive material, they can form a flexible conductive network through line-to-point contact with the electrode active material, so they can connect active material particles more effectively with a much smaller amount compared to point-to-point carbon black.

[0007] In addition, it is known that using CNT conductive materials in cathode materials provides more active sites compared to conventional carbon black-based conductive materials, thereby increasing energy capacity, and that CNTs, with their high electrical conductivity, improve the efficiency and output performance of secondary batteries.

[0008] In particular, compared to conventional conductive material carbon black, the amount used can be reduced to one-fifth, and since more active material can be added to the same volume, the volumetric energy density of the secondary battery can be dramatically improved.

[0009] Generally, although various low-cost synthesis technologies for CNTs have been developed, they are difficult to use in their raw form because aggregation occurs during the synthesis stage and they are obtained in a fine powder state. Therefore, in order for CNTs to exhibit properties such as conductivity, they must be prepared in the form of intermediate materials, such as by physically dispersing them in a solution or compounding them with other materials.

[0010] In particular, SWCNTs form bundles in solution due to strong Van Der Waals forces, or MWCNTs form aggregates that are entangled with each other. In order for CNTs to fully exhibit the properties required as conductive materials for secondary battery electrodes, uniform and stable dispersion technology, which is considered the most difficult challenge in the process of manufacturing the CNT pre-dispersion solution—an intermediate material before manufacturing the composite—must be secured.

[0011] Therefore, conventional solvent-based CNT dispersion techniques have applied ultrasonic dispersion techniques using organic solvents. While it is known that amide-based DMF or NMP are the most effective (solubility >50 mg / L) for such conventional ultrasonic dispersion techniques, there was a problem of poor stability because the dispersion was based on a simple solving effect.

[0012] In addition, conventional ultrasonic dispersion techniques generally have a problem of very low solubility (less than 1) for various solvents used in solution processes, such as alcohols, BTX, and aqueous solutions, so additional treatment such as surfactant addition or surface functionalization or other dispersion techniques are required.

[0013] Furthermore, conventional dispersion techniques introduce additives such as surfactants into the dispersion solution to enhance dispersibility, offering advantages such as a stable solution and increased maximum solubility. Commonly used materials include SDS (Sodium Dodecyl Sufate), Triton X-100, NaDDBS (Sodium Dodecylbenzene Sulfonate), Gum Arabica, or NBR (Acrylonitrile-Butadiene Rubber) or HNBR as additives for cathodes. However, when applied to actual fields such as secondary batteries, surfactants and other additives act as impurities, leading to limitations such as the need for removal processes or the requirement for minimal use. Prior art literature

[0014] (Patent Document 0001) KR 10-2023-0002304 A(2023.01.05) The problem to be solved

[0015] Accordingly, the present invention aims to provide a continuous flow multi-frequency dispersion device that is free of impurities by repeatedly grinding with ultrasound of different frequency bands. means of solving the problem

[0016] The present invention may include the following embodiments to achieve the above objectives.

[0017] An embodiment of the present invention may provide a continuous flow multi-frequency dispersion device comprising: a first ultrasonic grinding unit that first grinds a processing target (e.g., CNT conductive material) supplied according to a driving command of a control panel using ultrasound of a first band; a second ultrasonic grinding unit that secondarily grinds a processing target that has been first ground and transported through a circulation pipe connected to the first ultrasonic grinding unit using ultrasound of a second band and a third band; a main tank that is respectively connected to the first ultrasonic grinding unit and the second ultrasonic grinding unit through a circulation pipe and stores a processing target that has been secondarily ground and transported through the connected circulation pipe; a circulation pump that supplies the processing target stored in the main tank to the first ultrasonic grinding unit, supplies a dispersion liquid that has been first ground in the first ultrasonic grinding unit to the second ultrasonic grinding unit, and circulates a dispersion liquid that has been secondarily ground in the second ultrasonic grinding unit to the main tank; and a control panel that drives the circulation pump to repeat the ultrasonic grinding process of a processing target that extends from the main tank to the first ultrasonic grinding unit, from the first ultrasonic grinding unit to the second ultrasonic grinding unit, and from the second ultrasonic grinding unit to the main tank according to a set condition. Effects of the invention

[0018] Therefore, the present invention enables stable, uniform, and stable dispersion without the problem of very low solubility (less than 1) in the solution process, and without additional treatment such as surfactant addition or surface functionalization or other dispersion techniques by continuously ultrasonically grinding with ultrasound of a different frequency band until the set conditions are satisfied.

[0019] In addition, since the present invention enables uniform and stable dispersion of a conductive agent (CNT conductive material) for a secondary battery, it eliminates the need for separate processing and / or additives such as surfactants, thereby reducing expenses and enabling the production of a high-quality dispersion. Brief explanation of the drawing

[0020] FIG. 1 is a block diagram illustrating a continuous flow type multi-frequency dispersion device according to the present invention. FIGS. 2 and FIGS. 3 are perspective views illustrating a continuous flow type multi-frequency dispersion device according to the present invention. Figure 4 is a perspective view illustrating a cooling coil. Figure 5 is a diagram illustrating the first ultrasonic grinding unit. Figure 6 is a cross-sectional view of Figure 5. Figure 7 is a plan view of the second ultrasonic grinding section. FIG. 8 is a front view of the second ultrasonic grinding unit. Figure 9 is a cross-sectional view of the second ultrasonic grinding section. FIG. 10 is a perspective view illustrating the main tank. Figure 11 is a cross-sectional view illustrating the main tank. FIG. 12 is a flowchart illustrating a continuous flow multi-frequency dispersion method according to the present invention. Specific details for implementing the invention

[0021] Although the present invention may be subject to various modifications and may have various embodiments, specific embodiments are to be described in detail by way of illustration in the drawings. This is not intended to limit the present invention to specific embodiments, and it should be understood that any modification, equivalent, or substitution falls within the spirit and scope of the present invention for connecting and / or fixing structures extending in different directions.

[0022] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0023] In this specification, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] Hereinafter, a preferred embodiment of a continuous flow type multi-distribution device according to the present invention will be described with reference to the accompanying drawings.

[0026] FIG. 1 is a block diagram illustrating a continuous flow multi-frequency disperser according to the present invention, and FIG. 2 and FIG. 3 are perspective views illustrating a continuous flow multi-frequency disperser according to the present invention.

[0027] Referring to FIGS. 1 to 3, the present invention may include a control panel (100), a cooling water supply unit (200), a raw material supply unit (300), a circulation pump (400), an oscillation unit (500), an ultrasonic grinding unit (600), a main tank (700), and a storage tank (800).

[0028] Additionally, the present invention may be configured as a movable device. Referring to the drawings, the present invention may further include a movable member (900) having at least one space capable of accommodating a control panel (100) described above, an ultrasonic grinding unit (600), a main tank (700), a circulation pump (400), and an oscillation unit (500), comprising a plurality of rollers (920) on the lower side of a bottom plate (910), a frame (930) extending and connected in the vertical and horizontal directions from the bottom plate (910), and a top plate (940).

[0029] The control panel (100) may include a plurality of switches that output driving commands, a light-emitting display means and / or a display that output status information. Alternatively, it may be provided as a touch-type panel (100) in which switches and a display are combined.

[0030] The control panel (100) outputs operation commands to the circulation pump (400), the cooling water supply unit (200), and the oscillation unit (500). The control panel (100) can also accumulate the number of ultrasonic crushing operations on the processing target moved from the main tank (700) or measure the time, and if the set conditions are satisfied, it can alert the completion of the operation with a visual or auditory signal.

[0031] The oscillating unit (500) oscillates the ultrasonic grinding unit (600) according to a control command from the control panel (100). Preferably, the oscillating unit (500) oscillates the ultrasonic grinding unit (600) in one or more bands selected from a plurality of bands. To this end, the oscillating unit (500) may be connected to the control panel (100) and the ultrasonic grinding unit (600) via electrical wiring for the transmission of electrical signals. This is a general matter and is not illustrated in the drawings.

[0032] The cooling water supply unit (200) supplies cooling water to the ultrasonic grinding unit (600) and the main tank (700). Here, the cooling water can be supplied through a plurality of cooling coils (210) fixed to the outer surface of a circulation pipe (410) through which the target to be processed (e.g., carbon nanotube dispersion) circulates, and through a cooling pipe (not shown) connected to the main tank (700), etc.

[0033] The cooling coil (210) is described with reference to FIG. 4.

[0034] Figure 4 is a perspective view illustrating a cooling coil.

[0035] Referring to FIG. 4, a plurality of cooling coils (210) can be installed spaced apart from each other in a circulation pipe (410) extending between the ultrasonic grinding unit (600) and the main tank (700).

[0036] Specifically, the cooling coil (210) may include an inlet (211) and an outlet (212) to which cooling pipes are connected, a plurality of first cooling plates (212, 212') fixed to the outer surface of a circulation pipe (410), and a coil housing (211) that accommodates the first cooling plates (212, 212').

[0037] The coil housing (211) is fixed to the outer surface of the circulation pipe (410) and forms a space on the inside in which cooling water and a first cooling plate (212) are accommodated.

[0038] The inlet (211) and the outlet (212) are formed at mutually spaced positions in the coil housing (211). The inlet (211) is connected to a cooling pipe extending from the cooling water supply unit (200), and the outlet (212) is connected to a cooling pipe extending from the cooling housing to the cooling water supply unit (200) or a separate coil housing (211).

[0039] That is, the cooling water flows into the coil housing (211) through the inlet (211) and is discharged from the coil housing (211) to the outside through the outlet (212).

[0040] The first cooling plate (212) is plate-shaped and is fixed to the outer surface of a plurality of mutually spaced circulation pipes (410). Here, the first cooling plate (212) is fixed to the outer surface of the circulation pipe (410), and a flow channel (212a) may be formed to allow cooling water to move.

[0041] The flow passages (212a, 212a') form a passage through which cooling water moves. For example, the end of the first cooling plate (212, 212') is fixed so as to be in close contact with the inner surface of the coil housing (211), so that cooling water cannot flow. Therefore, cooling water moves from the inlet side to the outlet side through the flow passage (212a) formed in the cooling plate.

[0042] At this time, the flow channel (212a) can be aligned to be positioned diagonally to the flow channel (212a') of the adjacent cooling plate (223') so as to increase the travel distance of the cooling water and the residence time of the cooling vessel.

[0043] That is, the flow channels (212a, 212a') formed in each of the plurality of first cooling plates (212, 212') are arranged at an angle to each other to form a zigzag shape, thereby increasing the travel distance of the cooling water and the residence time within the coil housing (211).

[0044] The raw material supply unit (300) supplies the processing target to be dispersed to the ultrasonic grinding unit (600) or the main tank (700). To this end, the raw material supply unit (300) may be connected to the ultrasonic grinding unit (600) or the main tank (700) via a pipe.

[0045] The circulation pump (400) circulates the target to be processed in the circulation pipe (410) connected between the ultrasonic grinding unit (600) and the main tank (700) until the set condition is reached.

[0046] The ultrasonic grinding unit (600) may include a first ultrasonic grinding unit (610) and a second ultrasonic grinding unit (620). The first ultrasonic grinding unit (610) outputs ultrasonic waves having a single frequency band to grind the target to be processed, and the second ultrasonic grinding unit (620) simultaneously outputs ultrasonic waves having two or more different frequency bands to grind the target to be processed a second time and then discharge it to the main tank (700).

[0047] The first ultrasonic grinding unit (610) is described with reference to FIGS. 5 and FIGS. 6.

[0048] FIG. 5 is a perspective view illustrating the first ultrasonic grinding unit, and FIG. 6 is a cross-sectional view of FIG. 5.

[0049] Referring to FIGS. 5 and 6, the first ultrasonic grinding unit (610) may include a first vibrator (612) that emits ultrasonic waves of a first band, a first vibrator cover (611) that accommodates the first vibrator (612), a first receiving tank (616) into which a processing target is introduced and ground, a horn (615) that outputs ultrasonic waves of a first band within the first receiving tank (616), a booster (617) that transmits the ultrasonic waves emitted by the first vibrator (612), and a first table (618).

[0050] The first vibrator cover (611) is supported by the first table (618) to form a space in which the first vibrator (612) and booster (617) are accommodated on the inside.

[0051] Here, the first vibrator cover (611) may have a mounting hole (613) formed so that a cooling fan (not shown) capable of cooling the first vibrator (612) on the inside can be installed on the outer surface.

[0052] The first vibrator (612) emits ultrasound in a first band (e.g., any one of 170 to 200 kHz).

[0053] The booster (617) is fixed between the first vibrator (612) and the horn (615) by horn connecting bolts (614a, 614b) to amplify the first band of ultrasonic waves oscillating from the first vibrator (612) and transmit them to the horn (615). Thus, the booster (617) extends downward from the inside of the first vibrator cover (611).

[0054] The horn (615) is fixed inside the first receiving tank (616), and its upper side is drawn out to the upper side of the first receiving tank (616) and connected to the downwardly extended booster (617) by a horn connecting bolt (614b).

[0055] The first receiving tank (616) is connected to an inlet-side circulation pipe (411) connected from the main tank (700) and an outlet-side circulation pipe (412) extending toward the second ultrasonic grinding unit (620), and a horn (615) that outputs ultrasonic waves of the first band is installed inside.

[0056] Accordingly, the object to be processed (e.g., a dispersion liquid for a conductive material for a secondary battery) is introduced into the first receiving tank (616) through a circulation pipe (410) extended from the main tank (700), crushed by ultrasonic waves of the first band output from the horn (615), discharged through the outflow side circulation pipe (412), and moved to the second ultrasonic crushing unit (620).

[0057] The first table (618), with reference to FIGS. 2 and 3, may include a first lower plate (618a) fixed to the bottom plate (910) of the movable member (900), a plurality of upright supports (618b), and a first upper plate (618c) fixed at the top of the supports (618b). Here, the first upper plate (618c) may have a through-hole (not given a reference numeral) formed therein to fix the first vibrator cover (611).

[0058] The second ultrasonic grinding unit (620) is described with reference to FIGS. 7 to 9.

[0059] FIG. 7 is a plan view of the second ultrasonic grinding unit, FIG. 8 is a front view of the second ultrasonic grinding unit, and FIG. 9 is a cross-sectional view of FIG. 8.

[0060] Referring to FIGS. 7 to 9, the second ultrasonic grinding unit (620) includes a second vibrator (622) that outputs ultrasonic waves having multiple bands, a second vibrator cover (623) that accommodates the second vibrator (622), a second receiving tank (621) that accommodates a target for processing, and a second table (625) that supports the second vibrator (622) and the vibrator cover so as to be spaced apart from the ground.

[0061] The second receiving tank (621) is polygonal and columnar in shape, and receives the processing target that has been first crushed in the first ultrasonic crushing unit (610) on the inside, and discharges the processing target that has been crushed by the ultrasonic waves emitted from the second vibrator (622). To this end, the second receiving tank (621) is connected to an outflow side circulation pipe (410, 414) extending to the main tank (700) and an inflow side circulation pipe (410, 413) extending from the first ultrasonic crushing unit (610) at the bottom.

[0062] Here, at least one cooling coil (210) described above is installed on the outer surface of the inlet side circulation pipe (410, 413) and the outlet side circulation pipe (410, 414) respectively connected to the first ultrasonic grinding unit (610) and the second ultrasonic grinding unit (600).

[0063] The second vibrator (622) is arranged in a plurality of groups on the outer surface of the polygon (e.g., a pentagonal prism) of the second receiving tank (621). For example, the second receiving tank (621) may have a pentagonal prism shape having first to fifth faces. At this time, a plurality of A group (622a) spaced vertically is arranged on the first face of the second receiving tank, B group (622b) on the second face, C group (622c) on the third face, D group (622d) on the fourth face, and E group (622e) on the fifth face.

[0064] Additionally, the second vibrator (622) may be a combination of a vibrator that outputs a second band (e.g., any one of 30 to 45 KHz) and a vibrator that outputs a third band (e.g., any one of 70 to 90 KHz) in groups (622a, 622b, 622c, 622d, 622e).

[0065] Alternatively, the second vibrator (622) may be a combined vibrator capable of outputting both second and third band ultrasounds so that it can selectively output second band and third band ultrasounds by group (622a, 622b, 622c, 622d, 622e).

[0066] Additionally, the second vibrator (622) outputs ultrasound of a different band from the vibrators of other groups adjacent in the horizontal direction, but adjacent vibrators located in an upward or downward inclined direction from the current position may output ultrasound of the same band.

[0067] For example, the uppermost vibrator of group A (622a) outputs ultrasonic waves of the second band, and the uppermost vibrators of group E (622e) and group B (622b), which are horizontally positioned with the uppermost vibrator of group A (622a), can output ultrasonic waves of the third band.

[0068] Additionally, the second vibrator from the top of Group B (622b) and Group E (622e), located at a downwardly inclined position from the uppermost vibrator of Group A (622a), can output ultrasonic waves of the same second band as the uppermost vibrator of Group A (622a).

[0069] In addition, the second vibrator from the top of group A (622a) outputs a third band, and the second vibrator of group A and the uppermost vibrator of group B and the third vibrator of group E, located at upward and downward inclined positions, output a third band.

[0070] That is, in the present invention, the second ultrasonic grinding unit (620) includes a plurality of groups of vibrators that output ultrasonic waves of the second band and the third band, and the vibrators that output ultrasonic waves of the same band are aligned so as to be positioned in an up-and-down inclined direction.

[0071] Here, at least one of groups A to E (622a, 622b, 622c, 622d, 622e) may be placed with fewer numbers compared to other groups (e.g., three per group) (e.g., one oscillator outputting the second band and one oscillator outputting the third band, or two oscillators for both the second and third bands) or with more numbers, and the above diagonal arrangement rule may be applied.

[0072] Alternatively, the above diagonal arrangement rule can be applied even when the number of oscillators in each group (622a, 622b, 622c, 622d, 622e) is the same.

[0073] However, since the number of oscillators in the drawing is depicted as a total of 15, there may be an error in the rule, but it would be reasonable to apply the rule when there are a total of 20 oscillators by limiting the number of oscillators for each group (622a, 622b, 622c, 622d, 622e) to 4.

[0074] In addition, the number of vibrator groups (622a, 622b, 622c, 622d, 622e) and the number of vibrators included per group (622a, 622b, 622c, 622d, 622e) in the present invention can be modified and applied through various embodiments, so the number or formation is not limited in the present invention.

[0075] However, it is preferable that the second receiving tank (621) has a shape of an odd number of columns (e.g., triangular, pentagonal, heptagonal) on which the vibrators (622) are installed so that the ultrasonic waves output from the vibrators installed on the outer surface are not canceled out on the inner side.

[0076] The second vibrator cover (623) is fixed to the second table (625) by forming a space for accommodating the second vibrators (622) that are fixed to the outer surface of the second receiving tank (621). Here, the second vibrator cover (623) may have an outlet-side circulation pipe (410, 416) extending to the inner second receiving tank (621) on the upper side, and may form an opening that is open at the top or partially cut out for cooling the second vibrator (622).

[0077] Referring to FIG. 3, the second table (625) may include a plurality of supports (625b) standing upright on a second lower plate (625a) fixed to the bottom plate (910) of the movable member (900), and a second upper plate (625c) fixed to the top of the supports (625b).

[0078] The second upper plate (625c) can have the second vibrator cover (623) and the second receiving tank (621) fixed on the upper surface, and an opening can be formed for connecting the inlet side circulation pipe (410, 413) connected from the lower side. Here, the inlet side circulation pipe (410, 413) corresponds to the outlet side circulation pipe (410, 412) of the first ultrasonic grinding unit (610).

[0079] The main tank (700) receives the processing target initially supplied from the raw material supply unit (300) and the processing target that is secondarily crushed in the second ultrasonic crushing unit (620). Here, the processing target received in the main tank (700) is circulated to the first ultrasonic crushing unit (610) and the second ultrasonic crushing unit (620) until the set conditions (e.g., number of cycles and / or time) are satisfied.

[0080] Additionally, the main tank (700) may further include a discharge pipe and a measuring valve for analyzing the processing target so that the processing target, which is crushed in a continuous flow manner, can be discharged to a storage tank (800) when the set conditions are satisfied.

[0081] The main tank is described with reference to FIGS. 10 and FIGS. 11.

[0082] FIG. 10 is a perspective view of the main tank, and FIG. 11 is a cross-sectional view of the main tank.

[0083] Referring to FIGS. 10 and 11, the main tank (700) may include a tank housing (710), a cooling section (720), and a third table (730).

[0084] The tank housing (710) receives the processing target crushed in the second ultrasonic crushing unit (620) and the raw material initially supplied from the raw material supply unit (300). Here, the tank housing (710) may be connected to an inlet-side circulation pipe (410, 414, 415) to receive the processing target crushed in the second ultrasonic crushing unit (620), and an outlet-side circulation pipe (410, 413, 416) extended to supply the processing target crushed in the second ultrasonic crushing unit (610) and the raw material from the raw material supply unit (300).

[0085] Additionally, the tank housing (710) may be connected to a discharge pipe (417) for discharging the received processing target to a storage tank (800) when the set conditions are satisfied. The discharge pipe may also be connected in a structure that branches off from the outflow side circulation pipe (410). Here, the discharge pipe (417) may be equipped with a dispersion measuring valve (416) capable of measuring the dispersion target.

[0086] The third table (730) may include a plurality of supports (732) standing upright on the third lower plate (731), and a third upper plate (733) that supports the lower part of the tank housing (710) by forming a rim on the upper part of the supports (732).

[0087] The cooling unit (720) may include a cooling housing (721) fixed to the outer surface of the tank housing (710) to cool the tank housing (710), and a plurality of second cooling plates (722) fixed to surround the outer surface of the tank housing (710) within the cooling housing (721).

[0088] The cooling housing (721) may be connected to an inlet pipe (not shown) through which cooling water circulating from a cooling water supply unit (200) or a cooling coil (210) flows in, and an outlet pipe (not shown) extending to another cooling coil (210) or cooling water supply unit (200) through which the internal cooling water is discharged.

[0089] The second cooling plates (722) are configured as a plurality of spaced-apart plates that surround the outer surface of the tank housing (710) in a shape (e.g., circular). Here, the second cooling plates (722) may have a passage hole (not shown) formed therein to allow cooling water introduced through the inlet pipe to flow toward the outlet pipe. At this time, the passage holes of the second cooling plates (722) may be aligned in the same manner as the first cooling plates (212) (e.g., zigzag shape).

[0090] That is, the processing target (e.g., a dispersion of a conductive material for a secondary battery) contained in the main tank (700) is supplied to the first ultrasonic grinding unit (610) by a circulation pump (400) that operates according to a driving command of the control panel (100) and is ground once, and the processing target that has been ground once is moved to the second ultrasonic grinding unit (620) and ground twice. Then, the processing target is moved back to the main tank (700) and the above process is repeated until it meets the set conditions, thereby repeating the first and second ultrasonic grinding processes.

[0091] Here, the processing target that is received in the main tank (700) and / or moved after crushing is discharged through the discharge pipe (417) when the set condition (e.g., 5 to 10 repetitions) is satisfied.

[0092] The present invention includes the above-described configuration, and a continuous flow multi-frequency dispersion method using the above configuration is described below.

[0093] FIG. 12 is a flowchart illustrating a continuous flow multi-frequency dispersion method according to the present invention.

[0094] Referring to FIG. 12, the present invention includes a step S100 of supplying cooling water and raw materials, a step S200 of primary ultrasonic grinding, a step S300 of secondary ultrasonic grinding, a step S400 of storing in a main tank (700), a step S500 of repeating ultrasonic grinding if not meeting set conditions, and a step S600 of discharging the processed dispersion to a storage tank (800) if meeting set conditions.

[0095] Step S100 is a step of supplying a processing target (e.g., a dispersion for a conductive material of a secondary battery) to the main tank (700). Here, the processing target may be injected through a supply pipe (not shown) connecting the raw material supply unit (300) to the main tank (700), or a worker may manually open the cover of the main tank (700), introduce a hose connected to the raw material supply unit (300) into the main tank (700), and then operate the raw material supply unit (300) to inject the processing target into the main tank (700).

[0096] Step S200 is a step in which the processing target is first ultrasonically crushed by a driving command from the control panel (100). Here, the processing target is supplied to the first ultrasonic crushing unit (610) as the circulation pump (400) is operated by the control of the control panel (100). The first ultrasonic crushing unit (610) oscillates ultrasonic waves of the first band (> second band > third band) to first ultrasonically crush the processing target supplied from the main tank (700).

[0097] Here, the cooling water supply unit (200) can circulate cooling water to the cooling coil (210) fixed to the circulation pipe (410) connected to the main tank (700) through the cooling pipe and to the cooling unit (720) of the main tank (700) according to the driving command of the control panel (100).

[0098] Cooling water is cooled by circulating along a plurality of cooling coils (210) fixed to the outer surface of a circulation pipe (410) that extends along the first ultrasonic grinding unit (610), the second ultrasonic grinding unit (620), and the main tank (700), and along a cooling unit (720) fixed to the cooling unit (720) of the main tank (700). At this time, the cooling water supply unit (200) stores the circulated cooling water and then supplies it to the cooling pipe, thereby maintaining the temperature of the cooling water within a set range.

[0099] Step S300 is a step of secondarily ultrasonically crushing the target being processed. After the target being processed is crushed by ultrasonic waves of the first band in the first ultrasonic crushing unit (610), it is moved to the second ultrasonic crushing unit (620) through the circulation pipe (410) and is secondarily crushed by ultrasonic waves of the second band and third band that are simultaneously output, or by ultrasonic waves of either band.

[0100] For example, the target for processing is introduced into the second receiving tank (621) and is secondarily crushed by ultrasonic waves of the second band and third band oscillating from a second vibrator (622) that is aligned and fixed in a plurality of groups on the outer surface of the second receiving tank (621).

[0101] Step S400 is a step of storing the secondary ultrasonically crushed processing target in the main tank (700). The secondary ultrasonically crushed processing target is transferred to the main tank (700) through an outflow side circulation pipe (410) (414) extending from the second receiving tank (621) to the main tank (700).

[0102] Step S500 is a step of detecting whether a set condition is satisfied. The control panel (100) can detect that one cycle of ultrasonic grinding is completed through the capacity of the filled processing target via a detection device (not shown) installed in the main tank (700). The control panel (100) accumulates the number of times each cycle is completed and detects whether the accumulated number corresponds to a set condition (e.g., number of times).

[0103] At this time, if the accumulated number does not correspond to the set condition, the control panel (100) drives the circulation pump (400) and the oscillation unit (500) to repeat steps S200 to S400.

[0104] Step S600 is a step of discharging the processing target through a discharge pipe connected to the main tank (700) where the accumulated count at the control panel (100) corresponds to the set condition. Here, the control panel (100) may also output a visual and / or auditory signal to alert that the processing target's operation is completed.

[0106] As described above, the present invention allows for the production of a carbon nanotube dispersion with high viscosity, low viscosity, and easy control of diameter and length, which can be applied to secondary batteries, display panels, transparent electrodes, etc., by pulverizing a target to be processed through multi-band ultrasound and continuously proceeding with ultrasound of different bands as a first and second stage, thereby producing a product of uniform and stable quality.

[0108] Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0110] 100: Control Panel 200: Coolant Supply Unit 210: Cooling coil 211: Coil enclosure 211: Inlet 212: Outlet 212, 212' : 1st cooling plate 212a, 212a : Flow channel 300: Raw material supply unit 400: Circulation pump 410 : Circulation pipe 500 : Oscillation unit 600: Ultrasonic grinding unit 610: First ultrasonic grinding unit 611: First vibrator cover 612: First vibrator 613: Installation hole 614a, 614b: Horn connecting bolts 615: Horn 616: 1st receiving tank 617 : Booster 620 : 2nd Ultrasonic Grinding Unit 621: Second receiving tank 622, 622a, 622b, 622c, 622d, 622e: Second oscillator 623 : Second vibrator cover 625 : Second table 700: Main tank 710: Tank hull 711a: Handle 711b: Enclosure cover 720 : Cooling section 721 : Cooling housing 722 : 2nd cooling plate 800 : Storage tank 900 : Moving member

Claims

Claim 1 A first ultrasonic grinding unit (610) that first grinds the supplied CNT conductive material using first-band ultrasonics according to a driving command of a control panel (100); a second ultrasonic grinding unit (620) that secondarily grinds the firstly ground CNT conductive material transported through a circulation pipe (410) connected to the first ultrasonic grinding unit (610) using second-band and third-band ultrasonics; a main tank (700) that is respectively connected to the first ultrasonic grinding unit (610) and the second ultrasonic grinding unit (620) through a circulation pipe (410) and stores the secondly ground CNT conductive material transported through the connected circulation pipe (410); A circulation pump (400) that supplies the CNT conductive material stored in the main tank (700) to the first ultrasonic grinding unit (610), supplies the dispersion liquid that is first ground in the first ultrasonic grinding unit (610) to the second ultrasonic grinding unit (620), and circulates the dispersion liquid that is secondarily ground in the second ultrasonic grinding unit (620) back to the main tank (700); and a control panel (100) that drives the circulation pump (400) to accumulate the number of ultrasonic grinding cycles in the ultrasonic grinding process of the CNT conductive material extending from the main tank (700) to the first ultrasonic grinding unit (610), from the first ultrasonic grinding unit (610) to the second ultrasonic grinding unit (600), and from the second ultrasonic grinding unit (620) to the main tank (700), and to repeat according to the set number of ultrasonic grinding cycles.The CNT conductive material contained in the main tank (700) is supplied to the first ultrasonic grinding unit (610) by a circulation pump (400) that operates according to a driving command of the control panel (100) and is first ground, and the first ground CNT conductive material is moved to the second ultrasonic grinding unit (620) and second ground, and then moved back to the main tank (700) and the first and second ultrasonic grinding processes are repeated until the set number of ultrasonic grinding cycles is reached, and the first ultrasonic grinding unit (610) is connected to an inlet-side circulation pipe (411) connected from the main tank (700) and an outlet-side circulation pipe (412) extending toward the second ultrasonic grinding unit (620), and a horn (615) that outputs ultrasonic waves of the first band from the inside is installed in the first receiving tank (616); a first vibrator (612) fixed to the inside of the first receiving tank (616) and emitting ultrasonic waves of the first band; the first A booster (617) that is fixed between a vibrator (612) and a horn (615) by horn connecting bolts (614a, 614b) to amplify ultrasonic waves of a first band oscillating from a first vibrator (612) and transmit them to the horn (615); and a first vibrator cover (611) that accommodates a first vibrator and a booster, and forms a space in which the first vibrator and the booster are accommodated, and the second ultrasonic grinding unit (620) comprises a second vibrator (622) that outputs ultrasonic waves having a plurality of bands; a second vibrator cover (623) that accommodates a plurality of vibrators (622); and a receiving tank that forms a space in which a CNT conductive material that has been ultrasonically ground in the inner side of the second vibrator cover (623) is accommodated. and a second table (625) supporting a vibrator (622) and a second vibrator cover (623) so as to be spaced apart from the ground; wherein a plurality of vibrators (622) are each arranged by a plurality of groups (622a, 622b, 622c, 622d, 622e) grouped as a plurality, and the vibrators of each group (622a, 622b, 622c, 622d, 622e) selectively output ultrasound of a second band and a third band;A continuous flow multi-frequency disperser characterized by Claim 2 A continuous flow multi-frequency dispersion device according to claim 1, further comprising: a circulation pipe (410) through which a CNT conductive material is moved by connecting a main tank (700), a first ultrasonic grinding unit (610), and a second ultrasonic grinding unit (620); and a plurality of cooling coils (210) fixed to the outer surface of the circulation pipe (410) to cool. Claim 3 delete Claim 4 A continuous flow multi-frequency dispersion device according to claim 1, characterized in that a plurality of vibrators are installed such that vibrators output ultrasonic waves of the same band in a diagonal direction. Claim 5 A continuous flow multi-frequency dispersion device according to claim 1, comprising a plurality of vibrators, each vibrator capable of outputting ultrasound of a second band and a third band. Claim 6 A continuous flow multi-frequency dispersion device according to claim 2, comprising: a cooling coil (210) fixed to the outer surface of a circulation pipe (410) through which a CNT conductive material is moved, and a coil housing (211) having an inlet pipe through which cooling water flows in from a connected cooling pipe and an outlet pipe for discharging cooling water to another cooling pipe; and a plurality of first cooling plates (212) fixed to the outer surface of the circulation pipe (410) and spaced apart from each other within the coil housing (211). Claim 7 A continuous flow multi-frequency dispersion device according to claim 1, wherein the main tank (700) comprises: a tank housing (710) for accommodating a CNT conductive material, wherein an inlet-side circulation pipe (410) extending from a second ultrasonic grinding unit (620) and an outlet-side circulation pipe (410) extending to a first ultrasonic grinding unit (610) are connected; and a cooling unit (720) fixed to the outer surface of the tank housing (710) for cooling. Claim 8 A continuous flow multi-frequency dispersion device according to claim 7, wherein the cooling unit (720) comprises: a cooling housing (721) to which cooling pipes are connected for the inflow and outflow of cooling water on the outer surface of the tank housing (710); and a plurality of second cooling plates (722) fixed to the outer surface of the tank housing (710) and spaced apart from each other within the cooling housing (721). Claim 9 A continuous flow multi-frequency dispersion device according to claim 6, wherein a plurality of first cooling plates (212) have a passage hole (212a) through which cooling water is moved.

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