WO2017018656A1 - 전극 활물질 슬러리 코팅 장치 및 방법 - Google Patents
전극 활물질 슬러리 코팅 장치 및 방법 Download PDFInfo
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- WO2017018656A1 WO2017018656A1 PCT/KR2016/006138 KR2016006138W WO2017018656A1 WO 2017018656 A1 WO2017018656 A1 WO 2017018656A1 KR 2016006138 W KR2016006138 W KR 2016006138W WO 2017018656 A1 WO2017018656 A1 WO 2017018656A1
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- active material
- material slurry
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- current collector
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P95/00—Generic processes or apparatus for manufacture or treatments not covered by the other groups of this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/02—Sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an electrode active material slurry coating apparatus and method capable of coating an active material slurry on an electrode current collector.
- Electrochemical devices are the most attracted field in the field of energy storage technology, the development of secondary batteries that can be charged and discharged among the electrochemical devices has been the focus of attention.
- secondary batteries research and development on the design of new electrodes and batteries have been conducted in order to improve capacity density and specific energy.
- lithium secondary batteries have advantages of high operating voltage and significantly higher energy density than conventional batteries using aqueous solutions (electrolytes), and thus are widely used in various fields requiring energy storage technology.
- the manufacturing process of such a lithium secondary battery includes the electrode active material layer formation process of forming an electrode active material layer in an electrode collector.
- the electrode active material layer forming process includes applying an active material slurry in which electrode active material particles are injected into a binder solution to an electrode current collector, and drying the active material slurry applied to the electrode current collector to remove a solution and water present in the active material slurry. Forming an electrode active material layer on the electrode current collector.
- FIG. 1 is a view schematically showing a conventional electrode active material slurry coating apparatus
- FIG. 2 is a partially enlarged view of region I of FIG. 1
- FIG. 3 is a partially enlarged view of region II of FIG. 2
- FIG. 4 is A partial enlarged view of region III of FIG. 2.
- the electrode current collector E wound in the form of a roll is unwound in a predetermined process direction.
- the coating die 20 which coats the supply roll 10 which supplies continuously, and the active material slurry S supplied from the external slurry supply source (not shown) to the electrode collector E which is moving continuously in the said process direction.
- a dryer 30 for drying the active material slurry S coated on the electrode current collector E to form the electrode active material layer A on the electrode current collector E, and an electrode on which the electrode active material layer A is formed.
- recovers in roll state is included.
- the coating die 20 coats the active material slurry S on the coating regions T provided at predetermined intervals in the electrode current collector E.
- the coating die 20 is fixedly installed at a predetermined position to face the coating area T of the electrode current collector E, while the electrode current collector E is continuously moved along the process direction. Therefore, when the active material slurry S discharged from the coating die 20 meets the coating area T of the electrode current collector E, the active material slurry S has a direction opposite to the moving direction of the electrode current collector E. That is, the inertial force I is applied in the direction opposite to the process direction.
- the active material slurry S is selectively coated only on the coating regions T, rather than being constantly coated over the entire region of the electrode current collector E, and has high viscosity due to physical properties. Has a coefficient.
- the viscous force V selectively acts only on the opposite direction to the active material slurry S coated on the balcony area B
- Viscous force (V) selectively acts only in the process direction on the active material slurry (S) coated in the drag region (D)
- viscous force (V) is applied to the active material slurry (S) coated in the main coating region (M) It acts in both the process direction and the opposite direction.
- the balcony area B refers to an area corresponding to the front end of each coating area T and refers to an area where the coating of the active material slurry S is started
- the drag area D corresponds to the area of each coating area T.
- FIG. The area corresponding to the rear end refers to the area where the coating of the active material slurry S is finished
- the main coating area M is the area corresponding to the middle part of each coating area T and the balcony area B and the drag.
- region D is said.
- both the inertia force I and the viscous force V act in the opposite directions.
- the active material slurry S coated on the balcony area B is deflected in the opposite direction.
- the main coating area M is located in the opposite direction of the balcony area B, the active material slurry S coated on the balcony area B is the main coating area M in the process of deflecting in the opposite direction. It is supported by the active material slurry (S) coated on. Therefore, as shown in FIG. 3, the active material slurry S is convexly coated in the balcony area B.
- the inertial force I acts in the opposite direction and the viscous force V acts in the process direction.
- the viscosity of the active material slurry S coated on the drag region D is increased.
- Some of the inertia force I canceled by V) acts in the opposite direction. Therefore, the active material slurry S coated on the drag region D is deflected in the opposite direction.
- the active material slurry S coated on the drag region D is supported by the slurry coated on the main coating region M, unlike the active material slurry S coated on the balcony region B, even when deflected in the opposite direction. I can't. Therefore, as shown in FIG. 4, the drag region D is sharply coated such that the active material slurry S becomes thinner in the opposite direction.
- the active material slurry S on the electrode current collector E when the coating of the active material slurry S on the electrode current collector E is finished, that is, when the coating die 20 finishes discharging the active material slurry S, the active material slurry S is discharged. It does not end on this date and time, but it ends gradually over a predetermined time. Therefore, when the coating die 20 coats the active material slurry S on the drag region D, the active material slurry S per unit time can be finished so that the discharge of the active material slurry S to the electrode current collector E can be finished. ), The discharge amount gradually decreases. Therefore, the drag region D is sharply coated such that the active material slurry S becomes thinner in the opposite direction.
- the inertial force I acts in the opposite direction and the viscous force V acts in both the process direction and the reverse direction. Therefore, the inertia force I deflects the active material slurry S coated on the main coating region M in the opposite direction, while the viscous force V is deflected in the opposite direction by the inertia force I. Flatten out.
- the active material slurry S is coated relatively flat in the main coating region M.
- the active material slurry S is convexly coated in the balcony area B so as to be relatively thicker than the coating thickness of the active material slurry S coated in another area, and the active material slurry S is coated in the drag area D.
- the slurry S is sharply coated so as to be relatively thinner than the coating thickness of the active material slurry S coated on other areas.
- the balcony area B and the drag area D in which the coating thickness non-uniformity of the active material slurry S is generated may cause problems in processability or performance of the secondary battery when used in the manufacturing process of the secondary battery. It is not used in the manufacturing process and is discarded. Therefore, in the conventional electrode active material slurry coating apparatus 1, since a coating thickness non-uniformity area
- the present invention is to solve the above-mentioned problems of the prior art, and provides an active material slurry coating apparatus and method for improving the structure so that coating thickness non-uniformity of the active material slurry does not occur when coating the active material slurry on the electrode current collector. There is a purpose.
- an object of the present invention is to provide an active material slurry coating apparatus and method having an improved structure to prevent a coating thickness non-uniformity phenomenon of the active material slurry without changing the composition of the active material slurry.
- Electrode active material slurry coating apparatus for solving the above problems, the transfer unit for continuously transferring the electrode current collector in a predetermined process direction; And a coating die capable of reciprocating in the process direction or in a direction opposite to the process direction, wherein the coating die coats the active material slurry on a predetermined coating area of the electrode current collector being conveyed by the transfer unit;
- the coating die is in the main coating position spaced at a predetermined distance in the opposite direction from the coating start position when the balcony area in which the coating of the active material slurry begins to be coated reaches the coating start position while waiting at the predetermined coating start position. It is characterized by coating the active material slurry in the balcony area while moving to.
- the coating die is moved at the same speed as the moving speed of the electrode current collector while moving from the coating start position to the main coating position.
- the active material slurry is coated on the main coating region located between the balcony region and the drag region where the coating of the active material slurry is terminated in the coating region while the movement is stopped. do.
- the coating die is characterized in that when the drag region reaches the main coating position, the active material slurry is coated on the drag region while moving from the main coating position to a coating end position spaced by a predetermined distance in the process direction.
- the coating die is moved at the same speed as the moving speed of the electrode current collector while moving from the main coating position to the coating end position.
- the coating start position and the coating type position are characterized in that the same position.
- An electrode active material slurry coating apparatus for solving the above problems, the transfer unit for continuously transferring the electrode current collector in a predetermined process direction; And a coating die capable of reciprocating in the process direction or in a direction opposite to the process direction, wherein the coating die coats the active material slurry on a predetermined coating area of the electrode current collector being conveyed by the transfer unit;
- the coating die is coated with the active material slurry in the coating area with the movement stopped at a predetermined main coating position, and when the drag region in which the coating finishes in the coating region reaches the main coating position, the coating die is moved from the main coating position to the process direction.
- the active material slurry is coated on the drag region while moving to a coating end position spaced by a predetermined distance.
- the electrode active material slurry coating to coat the active material slurry on the coating region of the electrode current collector continuously transferred in a predetermined process direction using a coating die
- the method comprises: (a) when the balcony area where the coating of the active material slurry is started in the coating area with the coating die waiting at the predetermined coating start position reaches the coating start position, the coating die is oriented in the process direction from the coating start position.
- step (a) the coating die is moved in the opposite direction at the same speed as the moving speed of the electrode current collector.
- step (c) the coating die is moved in the process direction at the same speed as the moving speed of the electrode current collector.
- the coating start position and the coating type position are characterized in that the same position.
- Electrode active material slurry coating apparatus and method according to the present invention has the following effects.
- the present invention when coating the active material slurry in the balcony area where the coating of the active material slurry in the coating area of the electrode current collector, the coating die to reduce the amount of coating of the active material slurry per unit area for the balcony area By moving in the direction opposite to the direction of movement of the active material slurry in the balcony area can be coated with a uniform thickness.
- the present invention when coating the active material slurry in the drag region in which the coating of the active material slurry is finished in the coating region of the electrode current collector, the coating die to the electrode current collector so that the coating amount of the active material slurry per unit area to the drag region is increased By moving in the same direction as the moving direction of, the active material slurry can be coated on the drag region with a uniform thickness.
- the present invention can minimize the dead space of the electrode current collector can not be used in the secondary battery is coated with a non-uniform thickness of the active material, it is possible to improve the economy and yield.
- the active material slurry can be coated in a uniform thickness on the coating region of the electrode current collector by adjusting the relative speed of the active material slurry relative to the electrode current collector without changing the composition of the active material slurry, it is possible to further improve economics.
- FIG. 1 is a view schematically showing a conventional electrode active material slurry coating apparatus.
- FIG. 2 is a partial enlarged view of region I of FIG. 1;
- FIG. 3 is a partially enlarged view of region II of FIG. 2;
- FIG. 4 is a partially enlarged view of region III of FIG. 2.
- FIG. 5 is a view schematically showing an electrode active material slurry coating apparatus according to a preferred embodiment of the present invention.
- FIG. 6 is a partial enlarged view of region IV of FIG. 5; FIG.
- FIG. 7 is a view for explaining a method of coating the active material slurry on the balcony area of the coating unit of FIG.
- FIG. 8 is a view for explaining a method of coating an active material slurry on a main coating area by the coating unit of FIG. 6.
- FIG. 9 is a view for explaining a method of coating the active material slurry on the drag region by the coating unit of FIG. 6.
- FIG. 9 is a view for explaining a method of coating the active material slurry on the drag region by the coating unit of FIG. 6.
- FIG. 10 is a view illustrating a state in which an active material slurry is coated on a coating area of an electrode current collector by the coating unit of FIG. 6.
- FIG. 5 is a view schematically showing an electrode active material slurry coating apparatus according to a preferred embodiment of the present invention.
- the electrode active material slurry coating apparatus 100 for continuously supplying the electrode current collector (E); A transfer unit 120 for continuously transferring the electrode current collector E supplied from the supply unit 110 in a predetermined process direction; A coating unit 130 for coating the active material slurry S on the electrode current collector E being transferred by the transfer unit 120; A drying unit 140 for drying the electrode current collector E coated with the active material slurry S by the coating unit 130 to form an electrode active material layer A in the electrode current collector E; And a recovery roll 152 which winds up the electrode current collector E on which the electrode active material layer A is formed, and recovers it in a roll state.
- the supply unit 110 for continuously supplying the electrode current collector (E);
- a transfer unit 120 for continuously transferring the electrode current collector E supplied from the supply unit 110 in a predetermined process direction;
- a coating unit 130 for coating the active material slurry S on the electrode current collector E being transferred by the transfer unit 120;
- a drying unit 140 for drying the electrode current collector E coated with the active material slurry S by the coating unit 130 to
- the supply unit 110 is a device for supplying the electrode current collector E to be coated with the active material slurry S.
- the structure of the supply unit 110 is not specifically limited.
- the supply unit 110 may include a supply roll 112 that can unwind and continuously supply the electrode current collector E wound in a roll state.
- the type of the electrode current collector E supplied by the supply unit 110 is not particularly limited, and the supply unit 110 may supply an electrode current collector E that is commonly used for manufacturing a secondary battery.
- the transfer unit 120 is an apparatus for transferring the electrode current collector E supplied by the supply unit 110 in a predetermined process direction.
- the structure of the transfer unit 120 is not particularly limited.
- the transfer unit 120 may include a plurality of transfer rolls 122 installed at predetermined intervals between the supply unit 110 and the recovery unit 150. have. Each feed roll 122 continuously transfers the electrode current collector E supplied by the supply unit 110 along a predetermined process direction with a predetermined tension applied thereto.
- the coating unit 130 is an apparatus for coating the active material slurry S on the electrode current collector E.
- FIG. The coating unit 130 coats the active material slurry S on the predetermined coating region T of the electrode current collector E that is continuously transferred along the process direction by the transfer unit 120.
- the drying unit 140 is an apparatus for forming the electrode active material layer A in the electrode current collector E by drying the active material slurry S coated on the electrode current collector E.
- FIG. 5 the drying unit 140 may dry the coating die 131 and the recovery roll 152 of the coating unit 130 to dry the active material slurry S coated on the electrode current collector E.
- FIG. ) Is installed in the section between. Since the drying unit 140 has the same structure as a conventional drying unit for drying the active material slurry S, a detailed description thereof will be omitted.
- the recovery unit 150 is an apparatus for recovering the electrode current collector E in which the electrode active material layer A is formed.
- the structure of the recovery unit 150 is not particularly limited. For example, as illustrated in FIG. 5, the recovery unit 150 sequentially passes through the coating unit 130 and the drying unit 140 to receive the electrode current collector E having the electrode active material layer A formed thereon.
- the recovery roll 152 which can be wound up and collect
- FIG. 6 is a partially enlarged view of region IV of FIG. 5.
- the conventional electrode active material slurry coating apparatus 1 When using the conventional electrode active material slurry coating apparatus 1, as shown in Figs. 3 and 4, due to the inertial force (I) and the viscous force (V) acting on the active material slurry (S), balcony area (B) )
- the active material slurry (S) is convexly coated so that the coating thickness of the active material slurry (S) is relatively thick, the active material slurry (S) so that the coating thickness of the active material slurry (S) is relatively thin in the drag region (D). Is sharply coated.
- the balcony area B and the drag area D in which the coating thickness non-uniformity of the active material slurry S is generated are not used due to problems in the manufacturing process and performance of the secondary battery. Therefore, the conventional electrode active material slurry coating apparatus 1 has the problem that economy and yield are inferior.
- the coating unit 130 as shown in Figure 6, the active material slurry (S) of the electrode current collector (E) that is continuously transferred along the process direction by the transfer unit 120
- the coating die 131 may be coated on the coating area T, and the die transfer part 132 may reciprocate the coating die 131 in a direction opposite to the process direction or the process direction.
- the structure of the coating die 131 is not particularly limited.
- the coating die 131 includes a slit 133 to which the active material slurry S is supplied from an external slurry source (not shown), and an active material that has passed through the slit 133.
- a discharge port 134 for discharging the slurry S toward the electrode current collector E is included. 6
- the coating die 131 is coupled to the slider 135 of the die transfer part 132, which will be described later, so that the discharge port 134 and the coating area T of the electrode current collector E face each other. do.
- the die transfer unit 132 may include a slider 135 coupled to the coating die 131 and a slider 135 to be slidably moved in the process direction or the opposite direction. It may include a guide rail 136 having a guide slit 136a to be mounted, and a driving motor (not shown) for transferring the slider 135 along the guide rail 136.
- This die transfer part 132 as shown in Figures 7 and 9, the slider 135 and the coating die 131 coupled to the slider 135 along the guide rail 136 in the process direction or the opposite Can be reciprocated in the direction.
- the coating die 131 is installed in a section in which the electrode current collector E is linearly moved, and the die transfer part 132 is illustrated to linearly reciprocate the coating die 131. It is not limited.
- the coating die 131 is installed in a section in which the electrode current collector E is curvedly moved, such as a section in which the electrode current collector E passes through the feed roll 122, and the die transfer unit 132 may be provided.
- the coating die 131 may be curved reciprocating.
- FIG. 7 is a view illustrating a method of coating the active material slurry on the balcony area by the coating unit of FIG. 6, and FIG. 8 is a view illustrating a method of coating the active material slurry on the main coating area of the coating unit of FIG. 6.
- 9 is a view illustrating a method of coating the active material slurry on the drag region by the coating unit of FIG. 6, and
- FIG. 10 illustrates a state in which the active material slurry is coated on the coating region of the electrode current collector by the coating unit of FIG. 6. It is a figure which shows.
- the coating die 131 discharges the active material slurry S.
- the die transfer unit 132 waits while the coating die 131 is disposed at a predetermined coating start position P1. That is, the coating die 131 stands by at the coating start position P1.
- the coating die 131 starts discharging the active material slurry S and
- the die transfer part 132 transfers the coating die 131 at a predetermined moving speed from the coating start position P1 to the main coating position P2 spaced by the predetermined distance in the opposite direction.
- the distance between the coating start position P1 and the main coating position P2 is the active material slurry discharged from the coating die 131 while the coating die 131 moves from the coating start position P1 to the main coating position P2.
- (S) is set to be selectively coated on the balcony area (B). Therefore, the distance between the coating start position P1 and the main coating position P2 is determined according to process conditions such as the active material slurry S discharge speed of the coating die 131 and the moving speed of the electrode current collector E. FIG. do.
- the moving speed of the coating die 131 is not particularly limited.
- the die transfer unit 132 may transfer the coating die 131 in the opposite direction at the same speed as the movement speed of the electrode current collector E.
- the active material slurry S discharged from the coating die 131 is selectively coated on the balcony area B of the coating area T of the electrode current collector E.
- FIG. 7 since the coating die 131 coats the active material slurry S on the balcony area B while moving in the opposite direction, that is, in the opposite direction to the movement direction of the electrode current collector E, the conventional electrode active material slurry coating device The active material slurry S is coated on the balcony area B as compared with the case where the active material slurry S is coated on the balcony area B while the coating die 131 is fixed at a predetermined position as in (1). Time is reduced.
- the coating amount of the active material slurry S per unit area for the balcony area B compared with the case where the active material slurry S is coated in the balcony area B while the coating die 131 is fixed at a predetermined position. This decreases. Therefore, as shown in FIG. 10, the balcony area B is coated with the active material slurry S flat, and the coating thickness of the active material slurry S with respect to the balcony area B and the main coating area M are coated. The variation between the coating thicknesses of the active material slurry S relative to the conventional electrode active material slurry coating apparatus 1 is relatively reduced.
- the coating die 131 reaches the main coating position P2, as shown in FIG. 8, the coating die 131 continuously discharges the active material slurry S, and the die transfer part 132 The coating die 131 is waited with the main coating position P2 disposed. That is, the coating die 131 continuously discharges the active material slurry S in a state where the movement is stopped at the main coating position P2. Therefore, as shown in FIG. 10, the active material slurry S is coated flat on the main coating region M.
- FIG. 10 the active material slurry S is coated flat on the main coating region M.
- the coating die 131 continuously discharges the active material slurry S, as shown in FIG. 9.
- the die transfer unit 132 transfers the coating die 131 at a predetermined moving speed from the main coating position P2 to the coating end position P3 spaced apart by a predetermined distance in the process direction.
- the coating end position P3 is preferably the same position as the coating start position P1, but is not limited thereto. That is, the coating end position P3 is set to the same position as the coating start position P1 so that the coating die 131, which has moved to the main coating position P2, can be returned to its original position, that is, the coating start position P1.
- the moving speed of the coating die 131 is not particularly limited.
- the die transfer part 132 may include a coating die such that the inertial force I acting on the active material slurry S is reduced as much as possible when the active material slurry S meets the drag region D of the electrode current collector E. 131 may be transferred in the process direction at a speed equal to the moving speed of the electrode current collector E or at a speed slightly slower than the moving speed of the electrode current collector E.
- the active material slurry S discharged from the coating die 131 is selectively coated on the drag region D of the coating region T of the electrode current collector E.
- FIG. 10 since the coating die 131 coats the active material slurry S on the drag region D while moving in the process direction, that is, in the movement direction of the electrode current collector E, the conventional electrode active material slurry coating apparatus 1 As compared with the case in which the active material slurry S is coated on the drag region D while the coating die 131 is fixed at a predetermined position, the time for which the active material slurry S is coated on the drag region D is increased. do.
- the coating amount of the active material slurry (S) per unit area for the drag region (D) compared with the case where the active material slurry (S) is coated on the drag region (D) while the coating die 131 is fixed at a predetermined position. This is growing. Therefore, as shown in FIG. 10, the active material slurry S is coated flat on the drag region D, and the coating thickness of the active material slurry S on the drag region D and the main coating region M are applied to the drag region D.
- FIG. The variation between the coating thicknesses of the active material slurry S relative to the conventional electrode active material slurry coating apparatus 1 is relatively reduced.
- the coating die 131 reaches the coating end position P3, that is, the coating start position P1, the balcony region B of the next coating region T starts coating as shown in FIG. 6.
- the coating die 131 is kept in the standby state without discharging the active material slurry S, and the die transfer part 132 causes the coating die 131 to be coated starting position P1. Wait in the state arranged in. That is, the coating die 131 waits at the coating start position P1 until the coating operation of the active material slurry S for the next coating region T starts.
- the electrode active material slurry coating apparatus 100 has an active material slurry S generated between the balcony region B and the drag region D and the main coating region M in comparison with the conventional electrode active material slurry coating apparatus 1. Variation in the thickness of the coating can be reduced. That is, the electrode active material slurry coating apparatus 100 uniforms the active material slurry S over the entire region of the coating area T of the electrode current collector E so that there is no uneven portion of the coating thickness of the active material slurry S. It can be coated in one thickness. Accordingly, the electrode active material slurry coating apparatus 100 may improve economic efficiency and yield by minimizing a coating thickness non-uniformity region, that is, a dead space, which may not be used in a secondary battery manufacturing process.
- the electrode active material slurry coating apparatus 100 includes the coating die 131 that is discharging the active material slurry S so that the relative speed of the active material slurry S with respect to the electrode current collector E changes. By moving in the direction of movement or the direction opposite to the direction of travel, it is possible to prevent the coating thickness non-uniformity occurs in the balcony area (B) and the drag area (D). Therefore, the electrode active material slurry coating apparatus 100 can adjust the coating area of the electrode current collector E by adjusting the relative speed of the active material slurry S with respect to the electrode current collector E without changing the composition of the active material slurry S. Since the active material slurry (S) can be coated to (T) with a uniform thickness, economic efficiency can be improved.
- the present invention relates to an electrode active material slurry coating apparatus and method, and is particularly applicable to industries related to secondary batteries.
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Abstract
Description
Claims (11)
- 전극 집전체를 미리 정해진 공정 방향으로 연속적으로 이송하는 이송 유닛; 및상기 공정 방향 또는 상기 공정 방향의 반대 방향으로 왕복 이동 가능하며, 상기 이송 유닛에 의해 이송되고 있는 상기 전극 집전체의 미리 정해진 코팅 영역에 활물질 슬러리를 코팅하는 코팅 다이를 포함하며;상기 코팅 다이는,미리 정해진 코팅 시작 위치에서 대기 중이었다가, 상기 코팅 영역 중 상기 활물질 슬러리의 코팅이 시작되는 발코니 영역이 상기 코팅 시작 위치에 도달하면 상기 코팅 시작 위치로부터 상기 반대 방향으로 미리 정해진 거리만큼 이격된 주 코팅 위치까지 이동하면서 상기 발코니 영역에 상기 활물질 슬러리를 코팅하는 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 제1항에 있어서,상기 코팅 다이는, 상기 코팅 시작 위치에서 상기 주 코팅 위치로 이동되는 동안, 상기 전극 집전체의 이동 속력과 동일한 속력으로 이동되는 것을 특징으로 전극 활물질 슬러리 코팅 장치.
- 제1항에 있어서,상기 코팅 다이는, 상기 주 코팅 위치에 도달하면, 이동이 정지된 상태에서 상기 발코니 영역과 상기 코팅 영역 중 상기 활물질 슬러리의 코팅이 종료되는 드레그 영역 사이에 위치한 주 코팅 영역에 상기 활물질 슬러리를 코팅하는 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 제3항에 있어서,상기 코팅 다이는, 상기 드레그 영역이 상기 주 코팅 위치에 도달하면, 상기 주 코팅 위치에서 상기 공정 방향으로 미리 정해진 거리만큼 이격된 코팅 종료 위치까지 이동하면서 상기 드레그 영역에 상기 활물질 슬러리를 코팅하는 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 제4항에 있어서,상기 코팅 다이는, 상기 주 코팅 위치에서 상기 코팅 종료 위치로 이동되는 동안, 상기 전극 집전체의 이동 속력과 동일한 속력으로 이동되는 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 제4항에 있어서,상기 코팅 시작 위치와 상기 코팅 종류 위치는, 동일한 위치인 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 전극 집전체를 미리 정해진 공정 방향으로 연속적으로 이송하는 이송 유닛; 및상기 공정 방향 또는 상기 공정 방향의 반대 방향으로 왕복 이동 가능하며, 상기 이송 유닛에 의해 이송되고 있는 상기 전극 집전체의 미리 정해진 코팅 영역에 활물질 슬러리를 코팅하는 코팅 다이를 포함하며;상기 코팅 다이는, 미리 정해진 주 코팅 위치에서 이동이 정지된 상태로 상기 코팅 영역에 상기 활물질 슬러리를 코팅 중이었다가 상기 코팅 영역 중 코팅이 종료되는 드레그 영역이 상기 주 코팅 위치에 도달하면, 상기 주 코팅 위치에서 상기 공정 방향으로 미리 정해진 거리만큼 이격된 코팅 종료 위치까지 이동하면서 상기 드레그 영역에 상기 활물질 슬러리를 코팅하는 것을 특징으로 하는 전극 활물질 슬러리 코팅 장치.
- 미리 정해진 공정 방향으로 연속적으로 이송되는 전극 집전체의 코팅 영역에 코팅 다이를 이용해 활물질 슬러리를 코팅하는 전극 활물질 슬러리 코팅 방법에 있어서,(a) 상기 코팅 다이가 미리 정해진 코팅 시작 위치에서 대기 중인 상태에서 상기 코팅 영역 중 상기 활물질 슬러리의 코팅이 시작되는 발코니 영역이 상기 코팅 시작 위치에 도달되면, 상기 코팅 다이가 상기 코팅 시작 위치로부터 상기 공정 방향의 반대 방향으로 미리 정해진 거리만큼 이격된 주 코팅 위치까지 이동하면서 상기 발코니 영역에 상기 활물질 슬러리를 코팅 시작 단계;(b) 상기 코팅 다이가 상기 주 코팅 위치에 도달하면, 상기 코팅 다이가 이동이 정지된 상태에서 상기 발코니 영역과 상기 코팅 영역 중 상기 활물질 슬러리의 코팅이 종료되는 드레그 영역 사이에 위치한 주 코팅 영역에 상기 활물질 슬러리를 코팅하는 주 코팅 단계; 및(c) 상기 드레그 영역이 상기 주 코팅 위치에 도달하면, 상기 코팅 다이가 상기 주 코팅 위치에서 상기 공정 방향으로 미리 정해진 간격만큼 이격된 코팅 종료 위치까지 이동하면서 상기 드레그 영역에 상기 활물질 슬러리를 코팅하는 코팅 종료 단계;를 포함하는 것을 특징으로 하는 전극 활물질 슬러리 코팅 방법.
- 제8항에 있어서,상기 (a) 단계에서 상기 코팅 다이는, 상기 전극 집전체의 이동 속력과 동일한 속력으로 상기 반대 방향으로 이동되는 것을 특징으로 하는 전극 활물질 슬러리 코팅 방법.
- 제8항에 있어서,상기 (c) 단계에서 상기 코팅 다이는, 상기 전극 집전체의 이동 속력과 동일한 속력으로 상기 공정 방향으로 이동되는 것을 특징으로 하는 전극 활물질 슬러리 코팅 방법.
- 제8항에 있어서,상기 코팅 시작 위치와 상기 코팅 종류 위치는, 동일한 위치인 것을 특징으로 하는 전극 활물질 슬러리 코팅 방법.
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| JP2017554372A JP6559800B2 (ja) | 2015-07-28 | 2016-06-09 | 電極活物質スラリーコーティング装置及び方法 |
| CN201680019614.1A CN107912025B (zh) | 2015-07-28 | 2016-06-09 | 一种用于涂布电极活性材料浆料的装置和方法 |
| US15/556,533 US10500605B2 (en) | 2015-07-28 | 2016-06-09 | Apparatus and method for coating electrode active material slurry |
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| KR10-2015-0106650 | 2015-07-28 | ||
| KR1020150106650A KR101877101B1 (ko) | 2015-07-28 | 2015-07-28 | 전극 활물질 슬러리 코팅 장치 및 방법 |
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| CN108580143A (zh) * | 2018-05-22 | 2018-09-28 | 中国第汽车股份有限公司 | 一种全固态锂离子电池极板梯度喷涂设备及喷涂方法 |
| KR102104003B1 (ko) | 2018-11-01 | 2020-05-29 | 주식회사 두시텍 | 무인기 통합관제와 임무장비 센서데이터 획득을 이용한 공간정보 빅 데이터 플랫폼 구축 시스템 |
| KR102798490B1 (ko) * | 2019-10-17 | 2025-04-22 | 주식회사 엘지에너지솔루션 | 활물질 이중층을 형성하는 전극 슬러리 코팅 장치 및 방법 |
| US12533703B2 (en) * | 2020-11-11 | 2026-01-27 | Panasonic Intellectual Property Management Co., Ltd. | Electrode mixture slurry coating device |
| CN113078294B (zh) * | 2021-04-01 | 2022-09-27 | 山东天瀚新能源科技有限公司 | 一种便于对大批量锂电池极片附着湿浆料的设备 |
| US20240154085A1 (en) * | 2021-04-23 | 2024-05-09 | Lg Energy Solution, Ltd. | Electrode coating die, electrode coating apparatus, electrode manufacturing method, electrode, electrode assembly, and secondary battery |
| KR102865379B1 (ko) | 2021-11-12 | 2025-09-25 | 주식회사 엘지에너지솔루션 | 전극 코팅 장치 및 전극 코팅 방법 |
| KR20230078243A (ko) | 2021-11-26 | 2023-06-02 | 주식회사 엘지에너지솔루션 | 전극 코팅 장치 |
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| US10500605B2 (en) | 2019-12-10 |
| CN107912025A (zh) | 2018-04-13 |
| US20180050365A1 (en) | 2018-02-22 |
| KR20170013667A (ko) | 2017-02-07 |
| JP6559800B2 (ja) | 2019-08-14 |
| CN107912025B (zh) | 2019-11-22 |
| JP2018513536A (ja) | 2018-05-24 |
| KR101877101B1 (ko) | 2018-08-09 |
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