KR20220061809A - Apparatus for mixing precursors with a fixed quantity supplying apparatus, method for mixing positive electrode material, and positive electrode material in secondary battery - Google Patents

Abstract

The present invention relates to a cathode material mixing apparatus including a fixed quantity supply apparatus which can improve productivity. The cathode material mixing apparatus including a fixed quantity supply apparatus comprises: a feeding unit wherein one side thereof is opened, and an inlet is formed on an upper portion of the other side thereof; a discharge unit wherein one side thereof is opened, and an outlet is formed on a lower portion of the other side thereof; and a mixing transport unit coupled to an open position of the feeding unit and the discharge unit, and formed with a rotary drum. A manufacturing method of a cathode material for a secondary battery comprises: a first feeding step of feeding first precursor material powder into a continuous mixer; a second feeding step of feeding second precursor material powder into the continuous mixer; a mixing step of mixing the first precursor material powder and the second precursor material powder in the continuous mixer of embodiment 1; and a reaction step of allowing the mixed first precursor and second precursor to react with each other by a heating furnace after the mixing step.

Description

A cathode material mixing device including a quantitative supply device, a cathode material manufacturing method using a positive electrode material mixing device including a quantitative supply device, a cathode material for a lithium ion secondary battery {Apparatus for mixing precursors with a fixed quantity supplying apparatus, method for mixing positive electrode material, and positive electrode material in secondary battery}

The present invention relates to a positive electrode material mixing device including a quantitative supply device, a positive electrode material manufacturing method using a positive electrode material mixing device including a quantitative supply device, and a lithium ion secondary battery positive electrode material manufactured through the above manufacturing method.

Patent Invention 001 relates to an apparatus for manufacturing a chemical composition using a continuous mixing apparatus, and discloses an apparatus for manufacturing a chemical composition for continuously manufacturing a chemical composition for a flat panel display device or a semiconductor using the continuous mixing apparatus. The chemical composition manufacturing apparatus includes two or more raw material tanks for individually accommodating each raw material component of the chemical composition; a pump connected to the raw material tank to transport raw material components; a continuous mixing device in which two or more raw material components transferred from the raw material tank are continuously introduced, mixed in a flow, and a chemical composition in which the plurality of raw material components are uniformly mixed is discharged; a composition detector for analyzing the components of the chemical composition flowing out of the continuous mixing device; and a filler for filling the product container with the chemical composition prepared in the continuous mixing device.

Patent invention 002 relates to a method and apparatus for continuous purification of a solid mixture by fractional sublimation/desublimation, comprising: A method is provided for the continuous purification of a solid mixture by fractional sublimation/desublimation in a hot wall tubular oven, at one end of the hot wall tubular oven, feeding with an inert gas stream in which the solid mixture is dispersed by a dispersing unit, there is.

KR 10-1580451 B1 (registration date December 21, 2015) KR 10-1683930 B1 (registration date December 01, 2016)

The present invention relates to a positive electrode material mixing device including a quantitative supply device, a positive electrode material manufacturing method using a positive electrode material mixing device including a quantitative supply device, and a lithium ion secondary battery positive electrode material manufactured through the above manufacturing method.

The present invention has an open form on one side, and the input unit 100 having an inlet 110 formed on the upper side of the other side; A quantity supplying device 130 formed of a supply amount adjusting screw located in the inlet 110 and controlling the amount of material supplied through the inlet, and a screw rotation adjusting motor controlling the rotation of the supply amount adjusting screw; The discharge part 200 in which one side is in an open form, and the discharge port 210 is formed in the lower part of the other side; a mixing transfer unit 300 coupled to the opening positions of the inlet and outlet, and formed of a rotating drum 310; a plurality of nozzles 351 positioned inside the rotating drum; a gas ejection means 360 for ejecting gas to some of the nozzles; The nozzles are arranged at equal intervals inside the rotating drum; It consists of a composition comprising

The present invention relates to a cathode material mixing device including a quantitative supplying device for producing a cathode material for a secondary battery, and in the configuration presented above, the inlet is formed in plurality, and a supply container 120 communicating with each inlet; The supply container includes a first supply container 121 for supplying the NCM powder; a second supply container 122 to which lithium hydroxide or lithium carbonate is supplied; add

The present invention relates to a positive electrode material mixing device including a quantitative supply device for producing a secondary battery positive electrode material, and a plurality of mixing and transferring units are formed in the configuration presented above, and communicating in series; is added.

The present invention relates to a positive electrode material mixing device including a quantitative supply device for producing a secondary battery positive electrode material, and is located inside the rotating drum in the configuration presented above, and a protruding transfer projection 320 is added.

The present invention relates to a cathode material mixing device including a quantitative supply device for producing a cathode material for a secondary battery, and includes: a plurality of nozzles 351 positioned inside the rotating drum in the configuration presented above; A gas ejection means 360 for ejecting gas to some of the nozzles is added.

The present invention relates to a positive electrode material mixing device including a quantitative supply device for producing a secondary battery positive electrode material, and a coupling means 400 for coupling the input unit, the discharge unit, and the mixing transfer unit to the above-mentioned configuration; add; .

The present invention relates to a positive electrode material mixing device including a quantitative supply device for producing a secondary battery positive electrode material, and a driving means 500 for driving the rotating drum to the configuration presented above; is added.

The present invention relates to a positive electrode material mixing device including a quantitative supply device for producing a secondary battery positive electrode material, and temperature and humidity control means (600) for constantly maintaining the internal temperature and humidity of the mixing transfer unit in the configuration presented above; do.

The present invention relates to a method for manufacturing a cathode material for a secondary battery, comprising: a first input step (S110) of injecting a first precursor material powder into the continuous mixer; Before the first input step, a first measuring step of measuring the volume of the first precursor material powder (S120); a second input step of introducing a second precursor material powder into the continuous mixer (S210); a second metering step (S220) of measuring the volume of the second precursor material powder before the second input step; a mixing step of mixing the first precursor material powder and the second precursor material powder in the continuous mixer (S300); After the mixing step, a reaction step of reacting the mixed first precursor and the second precursor by a heating furnace (S400); After the reaction step, a pulverizing step (S500) of pulverizing the coagulated reactants to a predetermined size; After the pulverization step, a filter step (S600) of separating the untreated aggregates; consists of a time series step including.

The present invention relates to a cathode material for a lithium ion secondary battery, and includes a cathode material for a lithium ion secondary battery manufactured by the above manufacturing method.

The present invention has an open form on one side, and the input unit 100 having an inlet 110 formed on the upper side of the other side; A quantity supplying device 130 formed of a supply amount adjusting screw located in the inlet 110 and controlling the amount of material supplied through the inlet, and a screw rotation adjusting motor controlling the rotation of the supply amount adjusting screw; The discharge part 200 in which one side is in an open form, and the discharge port 210 is formed in the lower part of the other side; a mixing transfer unit 300 coupled to the opening positions of the inlet and outlet, and formed of a rotating drum 310; a plurality of nozzles 351 positioned inside the rotating drum; a gas ejection means 360 for ejecting gas to some of the nozzles; The nozzles are arranged at equal intervals inside the rotating drum; The inlet is formed in plurality, and the supply container 120 is in communication with each inlet; a rotational force transmission bar 150 that connects the screw rotation control motor and the supply amount control screw and is located inside the supply container 120; agglomeration prevention screw 160 coupled to the outer circumferential surface of the rotational force transmission bar 150; The aggregation prevention screw 160 has a curved cross-sectional shape in which the upper surface 161 is inclined toward the edge from the central portion where the rotational force transmission bar 150 is located, and the lower surface 162 has a flat shape. ; a flexible part 170 coupled to the edge of the aggregation prevention screw 160 to face the inner surface of the supply container 120 and having a thinner thickness than the aggregation prevention screw 160; The flexible portion 170 is formed of a flexible material; a baffle 123 protruding from the inner surface of the supply container 120; a heating unit 180 coupled to the side of the supply container 120 and dissipating heat; a water discharge unit 190 coupled to the upper side of the supply container 120 and forming a passage through which water is discharged; includes

Since the present invention has the effect of continuous supply and continuous stirring of two types of precursors, productivity can be improved.

The present invention has the effect of forming a plurality of supply containers and flexible production of various cathode materials by changing the input type.

In the continuous mixer of the present invention, a plurality of drums are arranged in series, and since each drum can control a rotation direction and a rotation speed differently, it is possible to implement a necessary stirring condition according to the conditions.

The continuous mixer of the present invention has a conveying projection, which forms an inclined plane, and thus enables movement of the fine powder with stirring.

1 is an overall schematic view of a cathode material mixing device including a quantitative supply device of the present invention.
Figure 2 is a diagram showing the relationship between the rotating drum and the conveying projection of the positive electrode material mixing device including the quantitative supply device of the present invention.
Figure 3 is an embodiment of the rotation relationship of the rotating drum of the positive electrode material mixing device including the quantitative supply device of the present invention.
4 is an embodiment of the driving means of the rotating drum of the positive electrode material mixing device including the quantitative supply device of the present invention.
5 is an embodiment of a cathode material mixing device including a quantitative supply device of the present invention.
6 to 8 are conceptual diagrams of gas pressure stirring of the cathode material mixing device including the quantitative supply device of the present invention.
9 is a flowchart of a method for manufacturing a secondary battery cathode material using a cathode material mixing device including a quantitative supply device of the present invention;
10 to 14 are various embodiments showing the quantitative supply device of the positive electrode material mixing device including the quantitative supply device of the present invention.

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to explain in detail enough that a person of ordinary skill in the art can easily carry out the present invention.

The numbers cited in the examples below are not limited only to the objects of reference, and may be applied to all examples. An object that exhibits the same purpose and effect as the configuration presented in the embodiment corresponds to an equivalent replacement object. The higher-level concept presented in the examples includes sub-concept objects that are not described.

[Embodiment 1-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and the main configuration is an input unit 100 having an open type on one side and an inlet 110 on the upper side of the other side; The discharge part 200 in which one side is in an open form, and the discharge port 210 is formed in the lower part of the other side; a mixing transfer unit 300 coupled to the opening positions of the inlet and outlet, and formed of a rotating drum 310; It consists of a composition comprising

[Embodiment 2-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 1-1, the inlet is formed in plurality, and a supply container communicating with each inlet ( 120); The supply container includes a first supply container 121 for supplying the precursor powder; The second supply container 122 to which lithium hydroxide or lithium carbonate is supplied; consists of a configuration including a.

[Embodiment 2-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 2-1, a fixed-quantity supply device 130 positioned between the supply container and the inlet; include

[Embodiment 2-3] The present invention relates to a positive electrode material mixing apparatus including a fixed-quantity supply device, and according to Embodiment 2-1, a capacity measuring device 140 for measuring the capacity of the supply container; includes

[Embodiment 2-4] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 2-1, the mixing and transferring unit is formed in one or a plurality of units.

The present invention relates to a device for mixing an additive material in order to manufacture a secondary battery cathode material. Conventionally, unit-by-unit mixing was performed, but the present invention aims at mass continuous production. This can secure price competitiveness by improving productivity and productivity. That is, a certain amount of precursor production materials are mixed in one stirring vessel. In particular, two or more materials are continuously input, and materials mixed in a certain ratio become precursor materials and are continuously discharged.

In order to implement this, it consists of an input part into which two kinds of precursor materials are input, a mixing transfer part where two kinds of precursor materials flow and mix, and an outlet part where the mixed precursors homogeneously mixed at a certain ratio are discharged.

In order to produce the 811 precursor, NCM 811 (hereinafter referred to as 'first material') is accommodated in powder form in the first supply container and supplied to the input unit, and lithium hydroxide LiOH (hereinafter referred to as 'second material') is supplied to the input unit in the second supply container. ') is received in powder form and supplied to the input unit. In addition, in order to mix the 622 precursor, NCM 622 (hereinafter referred to as 'first material') is accommodated in a powder form in the first supply container and supplied to the input unit, and lithium carbonate Li2CO3 (hereinafter referred to as 'first material') is accommodated in the second supply container. 2 substances.) is accommodated in powder form and supplied to the input unit.

The first material and the second material must be accurately added in a set amount, respectively. To this end, a quantitative supply device is located at each inlet. The quantitative supply device may control the mixing ratio of the first material and the second material by a controller, and the controller may meter the input amount or the input order and input.

The capacity measuring device should measure the amount of precursor in the supply container, and the insufficient amount should be supplemented. The capacity measuring device is equipped with a capacity measuring device inside or outside each supply container, and it is possible to achieve a smooth purpose of continuous supply.

The supply of the material through the quantitative supply device 130 may be made in various ways, and in one embodiment, the supply amount adjustment screw constituting the quantitative supply device 130 is rotated with a screw rotation adjustment motor, so that the supply amount adjustment screw It may be a method in which the supply amount of the material is adjusted in response to the number of rotations and the rotation speed.

[Embodiment 2-5] The present invention relates to a cathode material mixing device including a fixed-quantity supply device, and in Example 2-1, the fixed-quantity supply device 130 is located at the inlet 110 and A supply amount adjusting screw for controlling the amount of material supplied through the screw rotation control motor for controlling the rotation of the supply amount adjusting screw; includes

[Example 2-6] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 2-5, the screw rotation control motor and the feed amount control screw are connected and the supply container ( 120) a rotational force transmission bar 150 positioned inside; includes

[Example 2-7] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 2-6, an anti-agglomeration screw 160 coupled to the outer circumferential surface of the rotational force transmission bar 150 ); includes

[Embodiment 2-8] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Examples 2-7, the agglomeration prevention screw 160 has an upper surface 161 of a rotational force transmission bar. (150) having a curved cross-sectional shape with a gentle slope toward the edge from the central portion where the position is located, the lower surface 162 having a flat shape; includes

[Example 2-9] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 2-8, the inner surface of the supply container 120 and the The flexible portion 170 is coupled to face and has a thinner thickness than the agglomeration screw 160; includes

[Embodiment 2-10] The present invention is an invention for a positive electrode material mixing device including a fixed-quantity supply device, and in Examples 2-9, the flexible portion 170 is formed of a flexible material; includes

[Embodiment 2-11] The present invention relates to a positive electrode material mixing apparatus including a fixed-quantity supply device, and according to Embodiment 2-10, a baffle 123 protruding from the inner surface of the supply container 120; includes

[Embodiment 2-12] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 2-11, a heating part ( 180); includes

[Embodiment 2-13] The present invention relates to a cathode material mixing device including a fixed-quantity supply device, and in Example 2-12, it is coupled to the upper side of the supply container 120 and forms a passage through which moisture is discharged. to the water discharge unit 190; includes

In order to prevent aggregation of materials (precursor, lithium hydroxide, and lithium carbonate) accommodated in the supply container 120 , an aggregation prevention screw 160 is coupled to the outer circumferential surface of the rotational force transmission bar 150 .

In detail, when the supply container 120 is filled with powdery substances, a high load is applied to the material located on the lower side to cause agglomeration, and the agglomeration is precisely supplied through the quantitative supply device 130 . Since it interferes with the amount control, as shown in FIG. 10 , the anti-agglomeration screw 160 can separate and support the materials positioned at each height.

At this time, it is recommended that the anti-agglomeration screw 160 has a specific cross-sectional shape in order to facilitate the movement of the stored material and prevent aggregation in the process of the material moving.

In detail, the upper surface 161 of the anti-agglomeration screw 160 is formed in a curved shape in which the inclination becomes smaller from the upper side to the lower side and from the center to the edge, so that the material supported by the aggregation-preventing screw 160 is more easily This is to allow it to move downwards.

And, when the lower surface 162 has an inclination, the material in contact with the lower side is pushed toward the edge or the center in response to the inclination, and the powdery material is agglomerated, so that the lower surface 162 has a flat shape. did

In addition, the anti-agglomeration screw 160 may be made of a metal material, but it is recommended that the screw 160 does not crush the material transported by being made of a rubber (urethane rubber) material.

In addition, when the aggregation prevention screw 160 is formed of a metal material, the flexible part 170 made of a flexible material may be coupled to the edge of the aggregation prevention screw 160 .

In detail, when the anti-agglomeration screw 160 itself is made of a rubber material, a phenomenon of sagging may occur due to the weight of the material supported by the agglomeration prevention screw 160. It is possible to stably support the load and prevent the material transferred by the aggregation prevention screw 160 from being crushed by forming the flexible part 170 on the edge.

At this time, the flexible part 170 has a flexible characteristic, and when the material to be transferred is excessively collected in any one of a plurality of spaces partitioned in the vertical direction by the aggregation prevention screw 160, ( As shown in a), the flexible portion 170 is bent, and the excessively gathered material can be moved naturally to a space where the relatively small amount of the transferred material is located.

In addition, the flexible portion 170 is formed with a plurality of sealing lip 171 spaced apart from each other in the vertical direction at the edge to minimize friction that occurs when in contact with the supply container 120, and the transferred material is agglomerated screw 160 It can be prevented from easily escaping through the space formed between and the inner circumferential surface of the supply container 120 .

In addition, a plurality of baffles 123 are formed on the inner surface of the supply container 120 in a direction that intersects the aggregation prevention screw 160 , so that the material positioned inside the supply container 120 has irregular motion. Recommended.

In detail, when the material stored in the supply container 120 has a standardized movement, the material located in a specific area cannot be used and a problem of being fixed to the supply container 120 occurs, so the supply container 120 This problem is solved by forming the baffle 123 on the inner surface.

In addition, the anti-agglomeration screw 160 may include a plurality of screw units 160A, 160B, and 160C as shown in FIG. 12 , and the plurality of screw units are arranged to have different inclinations, and the supply container 120 ), it is also possible to make the material stored therein have more complex movements.

In addition, the present invention rotates the supply container 120 in the opposite direction to the aggregation prevention screw 160 as shown in FIG. 13 to assist the material stored in the supply container 120 to move more smoothly. It may further include a rotating means (124).

In addition, a screw protrusion 163 may be formed on the surface of the anti-agglomeration screw 160 to assist in transferring the powdery material and to release the agglomerated powder.

At this time, since the screw protrusion 163 may be formed on one or more surfaces selected from the upper and lower surfaces of the aggregation prevention screw 160 , the formation position is not limited.

[Embodiment 3-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 1-1, a plurality of mixing and conveying units are formed and communicated in series; includes

The present invention embodies the mixing transfer unit. The mixing transfer unit has a structure in which a plurality of cylindrical rotating drums are formed and arranged in series. In other words, a homogeneous mixing ratio can be obtained through the sequential movement of the rotating drum when the two types of precursor materials are pulverized.

In order to ensure a homogeneous mixing ratio, the plurality of rotating drums rotate in different directions, respectively, and each of the rotating drums may rotate at different speeds. Each rotating drum is characterized in that it is variably controlled in real time by a controller.

Since the shape of the rotating drum is cylindrical, the shape of the input part and the discharge part is preferably formed in a cylindrical shape. Since the input part and the rotary drum, the outlet and the rotary drum, and the rotary drum and the rotary drum are sealed by the airtight device 330, it is possible to prevent the precursor powder from flowing out under different conditions of each movement.

[Embodiment 3-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 3-1, the airtight device includes a sealing means positioned between adjacent rotating drums, and adjacent to each other. Airtight means for limiting the distance between the rotating drums and pressing and fixing the sealing means; includes

[Embodiment 3-3] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 3-2, the sealing means includes protruding ribs protruding from both sides in the thickness direction, and the rotating drum. is an insertion groove into which the protruding lip is fitted, and the airtight means includes a pressing groove into which the protruding lip is fitted and presses the fitted protruding lip; includes

[Embodiment 3-4] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 3-3, the rotary drum has a fastening groove formed to be stepped on the outer circumferential surface, and the airtight means a fastening lip fitted into the fastening groove and a fastening member for fixing and coupling the fastening lip to the rotating drum; includes

[Example 3-5] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 3-4, the airtight means is any one of a pair of adjacent rotary drums. a first airtight means coupled to and having a bent lip, a second airtight means coupled to the other rotary drum and having a fitting lip engaged with the bent lip; includes

[Embodiment 3-6] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 3-5, in the airtight device, the first airtight means and the second airtight means are each other Teflon coating layer formed on the interlocking contact surface; includes

[Embodiment 3-7] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 3-6, the sealing means is formed to protrude in the longitudinal direction, the vertical lip thickness a horizontal lip protruding in the direction; includes

[Example 3-8] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 3-7, the horizontal ribs are arranged in a plurality of pieces spaced apart in the longitudinal direction of the vertical ribs. thing; includes

[Example 3-9] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 3-8, the airtight device is provided on the rotary drum, an air discharging unit discharging air in an inclined form so that the air moves to the center of the rotating drum; includes

The present invention allows the sealing means to effectively seal the space formed between the rotary drums by locating the sealing means between the rotary drums, and the sealing means prevents the sealing means from being separated.

At this time, the separation restriction of the sealing means is made in the form that the sealing means presses the protruding lip formed on the edge of the sealing means, and an insertion groove into which the protruding lip is fitted is formed on the rotary drum to more effectively constrain the sealing means, and the hermetic means It is recommended that a pressing groove into which the protruding lip is fitted is formed.

In addition, a concave fastening groove is formed on the rotary drum, and the fastening lip formed in the airtight means is coupled to the rotary drum while being fitted in the fastening groove, so that the airtight means can be more firmly coupled to the rotary drum.

In addition, the airtight means is made in a form in which the first airtight means and the second airtight means are engaged with each other, and it is possible to limit the distance between the pair of rotating drums from being widened, and this separation distance limitation is due to the increase in the distance between the rotating drums. It has an effect of preventing the sealing means from being separated from the designated position.

At this time, the bent lip of the first airtight means engaged with each other and the alignment of the second airtight means should have a structure in which the contact surfaces engaged with each other have an inclined structure, and a Teflon coating layer for lowering resistance is formed on the contact surface having the inclined structure to reduce friction. It is recommended to minimize

In addition, as shown in FIG. 11 , the sealing means may include vertical ribs extending from the center of the rotating drum on the inner surface and horizontal ribs protruding from both sides in the thickness direction of the vertical ribs.

In detail, when the separation distance between the rotating drums is changed, the powdery material mixed between the rotating drums may be introduced, so that the powdery material is more effectively prevented from flowing through the horizontal ribs.

And, even if the inflow of the powdery material into the horizontal lip 331-12 is minimized, a minute material may be introduced, so that air is discharged into the space formed between the rotary drums on the rotary drum, and the introduced material An air discharging unit for allowing this to flow back into the rotating drum may be provided.

[Embodiment 4-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and according to Embodiment 1-1, it is located inside the rotating drum, and includes a protruding transfer projection 320; includes

[Example 4-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 4-1, an inclined plane 321 formed on the conveying projection and deflected with respect to the circumferential direction ) formed: includes.

[Embodiment 4-3] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Embodiment 4-2, a curved surface 322 is formed on a surface corresponding to the inclined plane; includes

[Embodiment 4-4] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Embodiment 4-2, the inclined direction of the inclined plane is formed in the direction of the discharge part; includes

[Example 4-5] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 4-1, the transfer projections are formed in a uniform or non-uniform shape; includes

The present invention proposes a transfer projection for smooth stirring of the precursor material powder. The transfer projection is located inside the rotating drum, and transfers a predetermined amount of the precursor powder.

That is, the precursor is transported along the inner wall of the drum by driving the rotating drum, but since the precursor material is in the form of powder, there is a limitation in the amount of transport. To overcome this, a transfer projection is placed on the inner wall of the rotating drum. That is, it is possible to obtain the effect of transferring a predetermined amount of the precursor powder by the transfer projection.

According to the rotation of the conveying projection and the rotating drum, the precursor material powder will be rotated only in the circumferential direction. However, in order to enable a continuous process, the transfer projection forms an inclined plane in order to enable sequential axial transfer of the precursor material powder. That is, the inclined plane is deflected at a certain angle toward the axial direction. That is, the inclined plane can obtain the effect of transferring the precursor material powder in the rotational direction and the axial direction of the drum.

[Embodiment 5-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and according to Embodiment 1-1, a plurality of nozzles 351 positioned inside the rotary drum; a gas ejection means 360 for ejecting gas to some of the nozzles; includes

[Example 5-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 5-1, the nozzles are arranged at equal intervals inside the rotating drum; includes; .

[Example 5-3] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 5-1, the nozzle has a jet in the direction of rotation of the rotating drum; including; do.

[Example 5-4] The present invention is an invention for a positive electrode material mixing device including a fixed-quantity supply device, and in Example 5-1, the deflection direction of the nozzle is changed according to a change in the rotation direction; include

[Example 5-5] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device. In Example 5-1, the jet pressure jetted to the nozzle is the same or different depending on the rotational position; includes

An object of the present invention is to facilitate the mixing of precursors inside the rotating drum. Specifically, the precursor is transferred in the rotational direction of the rotating drum, and the precursor powders are stirred during the transfer process. To increase the stirring effect, double stirring energy is given. That is, agitation energy by rotation and agitation energy by gas ejection pressure are provided. Depending on the position of the nozzle, the gas ejection pressure may be generated differently. Alternatively, the gas ejection pressure may be operated irregularly. This is accomplished by the stirring controller 373 .

[Example 5-6] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 5-1, the gas ejection means is a first chamber for sealing and accommodating a part of the rotary drum (361); and a gas supply device 370 communicating with the first chamber and supplying compressed gas.

[Example 5-7] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 5-1, the gas ejection means separates a part and the other part of the rotary drum for sealed accommodation a first chamber 361 and a second chamber 362; a circulation pipe 381 connecting the first chamber and the second chamber; It is mounted on the circulation pipe, and includes a circulation pump 382 for generating power to the gas.

[Example 5-8] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Examples 5-7 and 5-8, A boundary plate 363 accommodated therein and in contact with the rotating drum; and a contact seal 364 positioned between the boundary plate and the rotating drum.

The present invention (Examples 5-6 to 5-8) specifically suggests a gas ejection means. The rotary drum receives the lower part by the first chamber, the lower part by the first chum, and the upper part by the second chamber. Since the first chamber can maintain a constant gas pressure therein, a gas pressure of a uniform pressure can be supplied to the inside of the rotating drum.

The gas pressure may be supplied as a pressure obtained from the outside. Specifically, the gas obtained from the gas supply device enters the first chamber through the gas supply pipe, and the gas pressure is controlled by the supply control valve. The gas control valve is characterized in that it is controlled by a supply control device.

As another embodiment, the gas inside the rotary drum may be circulated and supplied. That is, the nozzle on the upper side sucks the gas, and the nozzle on the lower side supplies the gas.

To implement this, the rotating drum is bisected by a boundary plate. That is, the first chamber under the boundary plate supplies gas, and the second chamber above the boundary plate sucks the gas.

The sucked gas is transferred from the second chamber to the first chamber through the circulation pipe. A circulation pump is formed in the circulation pipe. The circulation pump is controlled by a supply control device, which is characterized in that it is controlled according to the rotational speed of the rotating drum and the temperature inside the rotating drum.

[Example 6-1] The present invention is an invention for a cathode material mixing device including a fixed-quantity supply device, and in Example 1-1, a coupling means 400 for coupling the input part, the discharge part, and the mixing transfer part ); includes.

[Example 6-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 1-1, the coupling means includes the center of the input part, the discharge part, and the mixing and transferring part. It includes a central axis 410 that passes through it.

[Example 6-3] The present invention relates to a cathode material mixing device including a fixed-quantity supply device, and in Example 1-1, the coupling means is located outside the input part, the discharge part, and the mixing and transferring part. and a case 420 that is formed and integrally fixed.

The present invention relates to the assembly of a plurality of combined input unit, transfer mixing unit, and discharge unit. The input part and the discharge part are fixed, and the conveying and mixing part rotates between the input part and the discharge part. In addition, a plurality of rotating drums constituting the conveying and mixing unit are formed, and each rotating drum may be rotated in different directions. Therefore, a plurality of components are integrated, and friction must be minimized in the process of being fixed and moved, and a constant bonding force must be secured.

To implement this, the present invention provides a coupling means for coupling the input unit, the discharge unit, and the mixing transfer unit (rotary drums).

In one embodiment, all components are coupled to one central axis. The central shaft is installed inside the fixed inlet and outlet and is completely coupled. By applying a certain tension, it is possible to prevent separation by the pressure and rotational force inside the rotating drum.

As another embodiment, one case may integrally combine the input part, the discharge part, and the mixing transfer part. That is, the case serves as a fastening member.

As another embodiment, the input part and the discharge part are fixed by a plurality of external support shafts, and this is to prevent contact with the precursor powder inside the rotating drum.

[Embodiment 7-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and according to Embodiment 1-1, a driving means 500 for driving the rotating drum; includes.

[Embodiment 7-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in the embodiment 7-1, the driving means includes an electric motor 511 for generating rotational power; do.

[Embodiment 7-3] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and according to Embodiment 7-1, a power transmission means 512 for transmitting the rotational force of the electric motor to the rotating drum ); includes.

[Example 7-4] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 7-1, the power transmission means is formed of any one selected from among gears, belts, chains, and ropes. to be; includes

[Example 7-5] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 7-1, the central shaft is rotated by an electric motor, and the input part and the discharge part are The bearing 521 is coupled to the coupled position, and forming a connecting rod 522 coupled to the rotary drum.

[Embodiment 7-6] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 7-1, when a plurality of the rotary drums are formed, the driving means is individually being formed;

[Embodiment 7-7] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and according to the embodiment 7-1, a drum speed controller 530 for controlling the rotation speed of the individual driving means; includes

The present invention embodies a driving means of a rotating drum. For smooth stirring of the precursor powder, the rotating drum must be rotated at a constant speed.

In one embodiment, a rotational force is generated by an electric motor, and the rotational force drives the drum by a power transmission means. The power transmission means is possible by any one selected from gears, belts, chains, and ropes. This is a structure that transmits the rotational force of the rotating drum from the outside.

As another embodiment, the rotating drum may be rotated inside the rotating drum. It has a structure in which one central axis exists in the axial direction inside the rotating drum, and the central axis is coupled to the rotating drum by a connecting rod extending in a direction perpendicular to orthogonal to the rotating drum. That is, it is possible to obtain the effect of rotating the drum by the rotation of the central axis.

[Example 8-1] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 1-1, a temperature and humidity control means ( 600); a positive electrode material mixing device including a quantitative supply device comprising a.

[Example 8-2] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 8-1, the temperature and humidity control means is located inside the mixing transfer unit, and a temperature sensor 610 for measuring; a temperature maintainer 620 in contact with the mixing transfer unit and adjusting the temperature of the mixing transfer unit; a temperature controller 630 for controlling the operation of the temperature maintainer; includes

[Embodiment 8-3] The present invention relates to a positive electrode material mixing device including a fixed-quantity supply device, and in Example 8-1, the temperature maintainer is formed of a Peltier element.

The present invention is to prevent a change in the physical properties of the precursor powder due to heat during the mixing process. To this end, it is necessary to maintain a constant temperature inside the mixing drum in real time.

As an embodiment, a temperature sensor is mounted inside the mixing drum, a constant temperature is raised and lowered by a temperature maintainer, and the temperature controller measures the temperature sensor signal and operates the temperature maintainer to control the temperature. Preferably, a teltier element may be used, or a refrigerant or hot water may be used, or a constant temperature may be maintained by circulating the water through the water jacket. In order to block external temperature, the mixing drum and the like may be coated with an insulating material to block thermal changes.

[Example 9-1] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and the first precursor material powder is introduced into the continuous mixer of Example 1-1. input step (S110); Before the first input step, a first measuring step of measuring the volume of the first precursor material powder (S120); a second input step of introducing the second precursor material powder into the continuous mixer of Example 1-1 (S210); a second metering step (S220) of measuring the volume of the second precursor material powder before the second input step; A mixing step of mixing the first precursor material powder and the second precursor material powder in the continuous mixer of Example 1 (S300); After the mixing step, a reaction step of reacting the mixed first precursor and the second precursor by a heating furnace (S400); After the reaction step, a pulverizing step (S500) of pulverizing the coagulated reactants to a predetermined size; After the pulverization step, a filter step (S600) of separating the untreated aggregates; consists of a time-series procedure including.

[Example 9-2] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, the reaction step is performed with dry air in a sealed reaction chamber. A heating step of heating to a temperature of 700 to 900 ℃ by (S410); After the heating step, a constant temperature maintaining step (S420) of maintaining a constant temperature; After the constant temperature maintaining step, a room temperature cooling step (S430) of cooling to room temperature state; includes.

The heating step, the constant temperature maintenance step, and the room temperature cooling step of the present invention are characterized in that the time is maintained in a ratio of 1: 2: 1, respectively, and the heating time is formed in 3 to 4 hours; characterized in that do it with In addition, the room temperature cooling step includes cooling by inserting a high thermal conductivity input into the reaction chamber, and the room temperature cooling step includes rotationally cooling inside the rotary chamber.

[Example 9-3] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, the material mixing step includes the first material and the a mixture input step in which the second material is introduced into the mixer chamber (S310); After the mixture input step, a stirring step (S320) of mixing with a blade in the mixer chamber; includes.

[Example 9-4] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a quantitative supply device, and in Example 9-1, after the reaction step, the outer surface of the agglomerate is coated Coating step (S450); includes.

The coating agent is formed of any one selected from alumina, zircon oxide, carbon, and chlorine dioxide; characterized in that, the coating step includes a condensate input step (S451) of injecting the condensate into the coating reactor; a coating material input step (S452) of inputting a coating material during the condensate input step; After the coating material input step, a coating heating step of heating the coating reactor (S453); After the coating agent input step, a coating pressure step of pressurizing the coating reactor (S454); After the coating material input step, a coating gas injection step (S455) of injecting a silane-based reaction gas into the coating reactor; includes.

After the coating gas injection step, the silane-based gas is thermally decomposed to produce H2 and Si, and the Si produced by the thermal decomposition is coated on the outer surface of the condensate. The thermal decomposition temperature is characterized in that 350-550 ℃, the heating temperature of the coating heating step is 650-850 ℃. The silane-based gas is at least one selected from the group consisting of SiH4, SiH3Cl, SiH2Cl2, and SiHCl3, and the amount of the silane-based gas injected is 1-5 parts by weight based on 100 parts by weight of the precursor powder.

[Example 9-5] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, after the reaction step, the condensate is washed to A washing step (S460) of removing the lithium input; After the washing step, a dehydration step of removing moisture from the condensate (S470); After the dehydration step, a drying step (S480) of evaporating moisture to the condensate by vacuum drying; includes a time series step.

[Example 9-6] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, before the second material metering step, the additive is It includes; an additive pulverizing step (S901) pulverized by a mill.

[Example 9-7] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, the compound pulverizing step is to remove the combined compound fine particles. A first crushing step of separating (S510); After the first grinding step, a second grinding step of pulverizing to a predetermined size (S520); includes

[Example 9-8] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-7, after the second grinding step, It consists of a time-sequential step including; a fine powder removal step (S530) of separating the powder.

[Example 9-9] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device, and in Example 9-1, the filter step removes the uncombined material by magnetic force. De-iron step of de-iron (S610); includes

[Example 9-10] The present invention relates to a method for manufacturing a cathode material using a cathode material mixing device including a fixed-quantity supply device. In Example 9-1, after the iron removal step, foreign matter is removed to separate foreign substances Step (S620); includes a time-series step including.

[Example 10-1] The present invention relates to a positive electrode material for a lithium ion secondary battery, and relates to a positive electrode material for a lithium ion secondary battery manufactured by the above manufacturing method.

100: inlet 110: inlet
120: supply container 121: first supply container
122: second supply container 123: baffle
130: quantitative supply device 140: capacity measuring device
150: rotational force transmission bar 160: agglomeration prevention screw
161: upper surface 162: lower surface
170: flexible part 180: heating part
190: water discharge part
200: discharge unit 210: discharge port
300: mixing transfer unit 310: rotary drum
320: transfer projection 321: inclined plane
322: curved surface 330: airtight device
351: nozzle 360: gas ejection means
361: first chamber 362: second chamber
363: boundary plate 364: contact sealing
370: gas supply device 373: stirring controller
381: circulation pipe 382: circulation pump
400: coupling means
410: central axis 420: case
500: driving means 511: electric motor
512: power transmission means 521: bearing
522: connecting rod 530: drum speed controller
600: temperature and humidity control means 610: temperature sensor
620: temperature maintainer 630: temperature controller

Claims (8)

In the positive electrode material mixing device including a quantitative supply device,
An input unit 100 having an open form on one side and an inlet 110 formed on the upper side of the other side;
Quantitative supply unit 130 formed of a supply amount adjusting screw positioned in the inlet 110 to control the amount of material supplied through the inlet, and a screw rotation adjusting motor controlling the rotation of the feed amount adjusting screw;
The discharge part 200 in which one side is in an open form, and the discharge port 210 is formed in the lower part of the other side;
a mixing transfer unit 300 coupled to the opening position of the input unit and the discharge unit, and formed of a rotating drum 310;
a plurality of nozzles 351 positioned inside the rotating drum;
a gas ejection means 360 for ejecting gas to some of the nozzles;
The nozzles are arranged at equal intervals inside the rotating drum;
The inlet is formed in plurality, and the supply container 120 is in communication with each inlet;
a rotational force transmission bar 150 that connects the screw rotation control motor and the supply amount control screw and is located inside the supply container 120;
agglomeration prevention screw 160 coupled to the outer circumferential surface of the rotational force transmission bar 150;
The aggregation prevention screw 160 has a curved cross-sectional shape in which the upper surface 161 is inclined toward the edge from the central portion where the rotational force transmission bar 150 is located, and the lower surface 162 has a flat shape. ;
a flexible part 170 coupled to the edge of the aggregation prevention screw 160 to face the inner surface of the supply container 120 and having a thinner thickness than the aggregation prevention screw 160;
The flexible portion 170 is formed of a flexible material;
a baffle 123 protruding from the inner surface of the supply container 120;
a heating unit 180 coupled to the side of the supply container 120 and dissipating heat;
a water discharge unit 190 coupled to the upper side of the supply container 120 and forming a passage through which water is discharged; A cathode material mixing device including a quantitative supply device comprising a.
The method according to claim 1,
The supply container 120 includes a first supply container 121 for supplying NCM powder;
a second supply container 122 to which lithium hydroxide or lithium carbonate is supplied; A cathode material mixing device including a quantitative supply device comprising a.
The method according to claim 1,
The mixing transfer unit is formed in plurality and communicated in series; Cathode material mixing device including a quantitative supply device comprising a.
The method according to claim 1,
It is located inside the rotary drum, the projection is formed a transfer projection 320; A cathode material mixing device including a quantitative supply device comprising a.
The method according to claim 1,
a coupling means 400 for coupling the input part, the discharge part, and the mixing transfer part; Cathode material mixing device including a quantitative supply device comprising a.
The method according to claim 1,
A positive electrode material mixing device including a quantitative supply device comprising a; temperature and humidity control means (600) for maintaining the internal temperature and humidity of the mixing transfer unit constant.
In the cathode material manufacturing method using a cathode material mixing device including a quantitative supply device,
A first input step of introducing the first precursor material powder into the continuous mixer of claim 1 (S110);
Before the first input step, a first measuring step of measuring the volume of the first precursor material powder (S120);
a second input step (S210) of injecting the second precursor material powder into the continuous mixer of claim 1;
a second metering step (S220) of measuring the volume of the second precursor material powder before the second input step;
a mixing step of mixing the first precursor material powder and the second precursor material powder in the continuous mixer of claim 1 (S300);
After the mixing step, a reaction step of reacting the mixed first precursor and the second precursor by a heating furnace (S400);
After the reaction step, a pulverizing step (S500) of pulverizing the coagulated reactants to a predetermined size;
After the pulverization step, a filter step of separating the untreated aggregates (S600); A method for manufacturing a cathode material using a cathode material mixing device including a quantitative supply device comprising a.
A cathode material for a lithium ion secondary battery manufactured by the method for manufacturing a cathode material using the cathode material mixing device including the quantitative supply device of claim 7.

Images