WO2022191508A1 - 다중 롤러 시스템, 전지 캔의 성형 장치 및 성형 방법 - Google Patents
다중 롤러 시스템, 전지 캔의 성형 장치 및 성형 방법 Download PDFInfo
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- WO2022191508A1 WO2022191508A1 PCT/KR2022/003052 KR2022003052W WO2022191508A1 WO 2022191508 A1 WO2022191508 A1 WO 2022191508A1 KR 2022003052 W KR2022003052 W KR 2022003052W WO 2022191508 A1 WO2022191508 A1 WO 2022191508A1
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- battery
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- rollers
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- 238000003825 pressing Methods 0.000 claims description 21
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- 230000008569 process Effects 0.000 description 39
- 238000002788 crimping Methods 0.000 description 18
- 238000000465 moulding Methods 0.000 description 13
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Images
Classifications
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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
- H01M10/0409—Machines for assembling batteries for cells with wound electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/16—Reverse flanging of tube ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/12—Edge-curling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/06—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers working inwardly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/12—Edge-curling
- B21D19/14—Reinforcing edges, e.g. armouring same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2653—Methods or machines for closing cans by applying caps or bottoms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/30—Folding the circumferential seam
- B21D51/32—Folding the circumferential seam by rolling
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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
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- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
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- 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
- H01M10/049—Processes for forming or storing electrodes in the battery container
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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
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
-
- 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 a multi-roller system, an apparatus for forming a battery can and a forming method.
- the battery can of the cylindrical secondary battery model developed recently has a larger inner diameter, which is made of a material having a thicker thickness. Therefore, a larger load is applied in forming the battery can of such a cylindrical secondary battery, and a longer process time is required.
- Cylindrical secondary battery battery cans are typically made of several types of CBD (Cylindrical beading, beading process), CCR 1-2-3 (Cylindrical crimping 1-2-3, crimping process), CSZ (Cylindrical sizing), etc. It is sequentially molded through the process, which takes a lot of processing time. Therefore, in order to achieve a target production volume for a battery can, a plurality of molding facilities are inevitably installed in parallel.
- CBD Cylindrical beading, beading process
- CCR 1-2-3 Cylindrical crimping 1-2-3, crimping process
- CSZ Cylindrical sizing
- battery cans are molded by installing a plurality of molding facilities in parallel, so that battery cans can be mass-produced as much as possible within a predetermined time.
- the battery can needs to be re-fixed according to the movement of the equipment, and a deviation of the setting value may occur during re-fixation.
- one object of the present invention is to provide a multi-roller system, a battery can forming apparatus and a forming method according to an embodiment of the present invention, thereby reducing the time required for transporting equipment, This is to prevent the deviation of the setting value that occurs when re-fixing according to the transfer of the equipment.
- the present invention provides a multi-roller system, an apparatus for forming a battery can and a forming method according to the following aspects.
- the two or more pairs of rollers rotate about an axis of rotation independent of each other, and the height change is controlled, respectively,
- At least one cross section of the two or more pairs of rollers has a different shape
- a multi-roller system is provided wherein each pair of rollers are each different in spacing from the cell can.
- an apparatus for forming a battery can there is provided an apparatus for forming a battery can
- a fixing unit provided to fix the battery can
- An apparatus for forming a battery can including the above-described multi-roller system is provided.
- An electrode assembly having a structure in which a first electrode, a separator, and a second electrode are sequentially stacked and wound in a battery can is placed, an electrolyte is injected, and is formed at a side end adjacent to an open part of the battery can and is press-fitted inward a first step of forming a beaded part and stacking a gasket and a cap assembly on the beading part;
- a fourth step of pressing the end of the open part of the battery can in which the inclined section is formed to form a closed section in which the end of the open part of the battery can is parallel to the side of the battery can;
- a fifth step of forming a flat section parallel to the lower surface of the battery can by pressing the end of the open part of the battery can in which the inclined section and the closed section are formed
- At least two of the third to fifth steps provide a method of forming a battery can using the multi-roller system described above.
- a complex molding process can be efficiently achieved while unifying the process.
- the molding quality for the battery can is improved.
- FIG. 1 is a perspective view of a conventional roller system is shown.
- FIG. 2 is a perspective view of a multi-roller system according to an embodiment of the present invention.
- FIG. 3 is a front view showing an inclined section formed by an A' roller.
- FIG. 4 is a front view showing a closed section formed by a roller B'.
- FIG. 5 is a front view showing a flat section formed by a C' roller.
- first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms.
- the above terms are used only for the purpose of distinguishing one component from another.
- a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.
- the term “and/or” includes a combination of a plurality of related items or a portion of a plurality of related items.
- FIG. 1 is a perspective view of a roller system according to the prior art, in which a pair of first rollers A for pressing (or molding) an end of an open portion of a battery can 1 are shown.
- the first roller is applied only to one process, for example, one process may be the first crimping process.
- the battery can pressurized by the first roller must be transferred to another roller system.
- another roller system may have a second roller installed.
- process deviation according to the transfer occurs.
- the two or more pairs of rollers rotate about an axis of rotation independent of each other, and the height change is controlled, respectively,
- At least one cross section of the two or more pairs of rollers has a different shape
- the distance between each pair of rollers and the battery can is different
- two or more pairs of rollers applied to the battery can 1 include, for example, a first roller (A), a second roller (B) and a third roller (C), and the battery can 1 ) there is a fixing unit (2) for fixing it.
- These first to third rollers (A to C) rotate relative to each other or different rotation axes, and the height change is controlled, respectively.
- at least one cross section of the two or more pairs of rollers has a different shape.
- the fact that at least one cross-section of the roller has a different shape means that an area approaching the battery can is different, or when the roller is cut in the width direction, the shape of the cross-section is different.
- first to third rollers may approach and pressurize the battery can 1 with a time difference.
- first to third rollers may have the same or different pressures applied to the battery can 1 .
- one process is performed by the roller approaching the battery can first by fixing the battery can once and using that the distances between the rollers of each pair of the first to third rollers and the battery can are different, respectively. After that, the subsequent processes are sequentially performed.
- the roller approaching the battery can first by fixing the battery can once and using that the distances between the rollers of each pair of the first to third rollers and the battery can are different, respectively. After that, the subsequent processes are sequentially performed.
- the two or more pairs of rollers are arranged in two or more pairs of rollers.
- a pair of first rollers for pressing the end of the open part of the battery can to form an inclined section in which the end of the open part of the battery can is inclined toward the central axis of the battery can;
- a pair of third rollers for pressing the side of the open part of the battery can in which the inclined section and the closed section are formed to form a flat section parallel to the lower surface of the battery can
- the end 10 of the open part of the battery can 1 is closed by the first roller A (in FIG. 3 , the cross-section of the first roller ( A') is shown), the inclined section 14 is shown, which is pressed and inclined toward the central axis of the battery can.
- the gasket 11 is also inclined toward the central axis of the battery can by the first roller A.
- the end 10 of the open part of the battery can in which the inclined section 14 is formed is a second roller B (in FIG. 4 , a cross section B′ of the second roller is shown). Pressurized by , a closed section 15 is shown perpendicular to the side 12 of the battery can. This sealing section 15 may serve to seal the battery can 1 by a subsequent third roller.
- the battery can in which the inclined section 14 and the closed section 15 are formed is disposed between the beading part 100 and the end 10 of the open part by a third roller (C) ( FIG. At 5, a flat section 16 is formed by pressing by the cross-section C' of the third roller (shown). As a result, the crimping portion 200 is formed.
- the process of forming the inclined section 14 , the sealing section 15 , and the flat section 16 described above is referred to as a crimping process, and is a process of sealing the upper cap by coupling the electrolyte solution into the battery can.
- the shapes of the cross-sections of the first to third rollers are different from each other.
- a person skilled in the art may change the pressure applied by the first to third rollers, the pressing position, the pressing area, and the like.
- a person skilled in the art can control the height change, rotation direction, rpm, movement speed, etc. of the first to third rollers, respectively, and change it so that the desired pressure molding (eg, crimping process) is possible. have.
- the cylindrical secondary battery 3 includes a battery can 1 and a jelly-roll type electrode assembly accommodated in the battery can 1 (a structure in which a first electrode, a separator, and a second electrode are stacked and wound) (not shown) ), a beading part 100 for mounting the cap assembly 13 coupled to the upper part of the battery can 1 , and a crimping part 200 for sealing the battery.
- the cap assembly 13 is an upper cap forming a cathode terminal, a positive temperature coefficient element (PTC) that blocks current by greatly increasing battery resistance when the temperature inside the battery increases, and blocks current when the pressure inside the battery rises or and/or a safety vent for evacuating gas, an insulating member for electrically separating the safety vent from the cap plate at a certain portion, and a cap plate to which a tab connected to a cathode is connected may have a sequentially stacked structure.
- the cap assembly 13 is mounted on the beading part 100 press-fitted to the inside by beading the upper end of the battery can 1 with the gasket 11 mounted thereon.
- the multi-roller system may include at least two pairs of first rollers (A) to third rollers (C).
- the crimping process by the first rollers (A) to the third rollers (C) is performed in 1 to 3 steps in detail, and the crimping process may be sequentially performed by the first to third rollers. have.
- the cross-sections of the first to third rollers have different shapes depending on the desired molding, height control is performed, respectively, and the rotational axis is also independent.
- the inclined section of the end of the open portion of the battery can provides a multi-roller system that forms an angle greater than 0 degrees and less than 90 degrees with respect to the central axis of the battery can.
- the inclined section of the end of the open portion of the battery can to form an angle of more than 0 degrees, more than 10 degrees, more than 20 degrees, more than 30 degrees, or more than 40 degrees with respect to the central axis of the battery can.
- the inclined section of the end of the open portion of the battery can form an angle of less than 90 degrees, less than 80 degrees, less than 70 degrees, less than 60 degrees, or less than 50 degrees with respect to the central axis of the battery can.
- the inclined section 14 of the end 10 of the open part of the battery can 1 forms an angle of about 30 degrees with respect to the central axis of the battery can.
- the length of the flat section provides a multi-roller system that is 5% or more and 30% or less based on the diameter of the battery can.
- the length of the flat section may be 5% or more, 10% or more, or 15% or more based on the diameter of the battery can.
- the length of the flat section may be 30% or less, 25% or less, or 20% or less based on the diameter of the battery can.
- the length of the flat section 16 when the length of the flat section 16 satisfies the above range, the length of the flat section 16 sufficiently provides a space in which a subsequent welding process can be performed, thereby reducing the defect rate. and to ensure structural stability.
- the length of the flat section 16 is less than 5%, the length of the flat section is too small, so it may not be possible to sufficiently provide a space in which a subsequent welding process can be performed. It may increase the defect rate that may occur in the process, or in the portion where the welding is performed, it is not possible to exhibit a stable bonding force, thereby reducing structural stability.
- the end 10 of the open part of the battery can may contact the electrode terminal formed in the upper central portion of the cap assembly 13 , thereby , there is a problem in that the performance of the secondary battery may be deteriorated due to the occurrence of a short circuit.
- the pressure applied by the second roller provides a multi-roller system that is 101% or more and 300% or less with respect to the pressure applied by the first roller.
- the pressure applied by the second roller is 101% or more, 110% or more, 120% or more, 130% or more, 140% or more, 150% or more of the pressure applied by the first roller. , 160% or more, 170% or more, 180% or more, or 190% or more.
- the pressure applied by the second roller is 300% or less, 290% or less, 280% or less, 270% or less, 260% or less, 250% or less of the pressure applied by the first roller. , 240% or less, 230% or less, 220% or less, or 210% or less.
- the pressure applied by the second roller when the pressure applied by the second roller is less than 101% of the pressure applied by the first roller, to form a flat section 16 in the crimping part 200 . , it may not be easy to further bend the end 10 of the open part of the battery can.
- the pressure applied by the second roller exceeds 300% of the pressure applied by the first roller, the magnitude of the pressure becomes excessively large, resulting in deformation of the end 10 of the open part of the battery can. It may be difficult to control, and accordingly, the defect rate of the product may increase due to excessive deformation in the process of forming the flat section in the crimping part.
- a fixing unit provided to fix the battery can
- It provides an apparatus for forming a battery can including a multi-roller system according to any one of the above embodiments.
- the fixing unit 2 surrounds the middle or lower portion of the battery can 1 so that the battery can 1 is fixed.
- the fixed unit 2 a chuck, jaw, or the like may be used.
- the number of fixing units may vary depending on the molding state of the battery can or the size of the applied model.
- An electrode assembly having a structure in which a first electrode, a separator, and a second electrode are sequentially stacked and wound on the battery can is placed to inject an electrolyte solution, and is formed at a side end adjacent to the open part of the battery can and faces inward.
- a fourth step of pressing the end of the open part of the battery can in which the inclined section is formed to form a closed section in which the end of the open part of the battery can is parallel to the side of the battery can;
- a fifth step of forming a flat section parallel to the lower surface of the battery can by pressing the end of the open part of the battery can in which the inclined section and the closed section are formed
- At least two of the third to fifth steps provide a method of forming a battery can using any one of the above-described multi-roller systems.
- first electrode refers to the anode and the term “second electrode” refers to the cathode, but vice versa.
- the cathode includes a cathode current collector and a cathode active material applied to at least one surface of the cathode current collector.
- Examples of the cathode current collector may be aluminum or an alloy, but is not limited thereto.
- Examples of the cathode active material may be a lithium-containing transition metal oxide, but is not limited thereto.
- the anode includes an anode current collector and an anode active material applied to at least one surface of the anode current collector.
- Examples of the anode current collector may be copper or an alloy, but is not limited thereto.
- Examples of the anode active material may be a carbon material, but is not limited thereto.
- the separation membrane is a membrane interposed between the cathode and the anode, and serves to separate the cathode and the anode, while facilitating the movement of ions required to block the circuit.
- An example of the separation membrane may be a microporous film composed of a polyolefin-based membrane, but is not limited thereto.
- the battery can is a substantially cylindrical container with an opening formed on one side, and is made of a conductive metal material.
- the side surface of the battery can and the opposite surface of the opening are generally formed integrally. That is, the battery can generally has a shape in which the upper end is open and the lower end has a closed area except for the central part, based on the height direction.
- a lower surface of the battery may have an approximately flat shape.
- the battery can accommodates the electrode assembly through an opening formed on one side in the height direction.
- the battery can may also accommodate the electrolyte through the opening.
- an electrode assembly having a structure in which a first electrode, a separator, and a second electrode are sequentially stacked and wound on the battery can is placed and an electrolyte is injected, and then formed at a side end adjacent to the opening of the battery can Then, the battery can is formed to have a beading portion press-fitted inwardly to prepare a battery can having a beaded portion, and then a gasket and a cap assembly are stacked on the beaded portion. Up to this point corresponds to the stage before the crimping process.
- a first roller A presses the end 10 of the open portion of the battery can 1 , so that the battery can Forms an inclined section 14 inclined toward the central axis of the.
- the second roller B (in FIG. 4 , a cross-section B ′ of the second roller is shown) is formed at the end 10 of the open part of the battery can in which the inclined section 14 is formed. to form a closed section 15 perpendicular to the side 12 of the battery can.
- This sealing section 15 may serve to seal the battery can 1 by a subsequent third roller.
- the third roller C (the cross-section C′ of the third roller is shown in FIG. 5 ) is a battery can having an inclined section 14 and a closed section 15 formed therein.
- a flat section 16 is formed by pressing between the beading portion 100 and the end portion 10 of the open portion.
- the process of forming the inclined section 14 , the sealing section 15 , and the flat section 16 described above is referred to as a crimping process, and is a process of sealing the upper cap by coupling the electrolyte solution into the battery can.
- the process is a granular crimping process, and may be sequentially performed from the first granular step to the third step.
- the cross-sections of the first to third rollers have different shapes depending on the desired molding, height control is possible, and the rotation axis is also independent.
- a method of forming a battery can in which the inclined section of the end of the open part of the battery can forms an angle greater than 0 degrees and less than 90 degrees with respect to the central axis of the battery can.
- the inclined section of the end of the open portion of the battery can to form an angle of more than 0 degrees, more than 10 degrees, more than 20 degrees, more than 30 degrees, or more than 40 degrees with respect to the central axis of the battery can.
- the inclined section of the end of the open portion of the battery can form an angle of less than 90 degrees, less than 80 degrees, less than 70 degrees, less than 60 degrees, or less than 50 degrees with respect to the central axis of the battery can.
- the inclined section 14 of the end 10 of the open part of the battery can 1 forms an angle of about 30 degrees with respect to the central axis of the battery can.
- the length of the flat section is 5% or more and 30% or less based on the diameter of the battery can.
- the length of the flat section may be 5% or more, 10% or more, or 15% or more based on the diameter of the battery can.
- the length of the flat section may be 30% or less, 25% or less, or 20% or less based on the diameter of the battery can.
- the length of the flat section 16 when the length of the flat section 16 satisfies the above range, the length of the flat section 16 sufficiently provides a space in which a subsequent welding process can be performed, thereby reducing the defect rate. and to ensure structural stability.
- the length of the flat section 16 is less than 5%, the length of the flat section is too small, so it may not be possible to sufficiently provide a space in which a subsequent welding process can be performed.
- the end 10 of the open part of the battery can may contact the electrode terminal formed in the upper central portion of the cap assembly 13 , thereby , there is a problem in that the performance of the secondary battery may be deteriorated due to the occurrence of a short circuit.
- the pressure pressed to form the closed section provides a molding method of a battery can that is 101% or more and 300% or less with respect to the pressure pressed to form the inclined section.
- the pressure applied by the second roller is 101% or more, 110% or more, 120% or more, 130% or more, 140% or more, 150% or more of the pressure applied by the first roller. , 160% or more, 170% or more, 180% or more, or 190% or more.
- the pressure applied by the second roller is 300% or less, 290% or less, 280% or less, 270% or less, 260% or less, 250% or less of the pressure applied by the first roller. , 240% or less, 230% or less, 220% or less, or 210% or less.
- A' cross section of the first roller
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
Claims (10)
- 두쌍 이상의 롤러를 포함하는 다중 롤러 시스템으로서,상기 두쌍 이상의 롤러는, 서로 독립적인 회전축을 기준으로 회전하고, 각각 높이 변화가 제어되며,상기 두쌍 이상의 롤러의 적어도 하나의 단면이 각각 다른 형상을 갖고,각 쌍의 롤러와 전지 캔과의 간격은 각각 상이한 것인다중 롤러 시스템.
- 청구항 1에 있어서,상기 두쌍 이상의 롤러는,상기 전지 캔의 개방부의 단부가 상기 전지 캔의 중심축을 향해 기울어진 경사 구간을 형성하도록 상기 전지 캔의 개방부의 단부를 가압하는 한 쌍의 제1 롤러;상기 전지 캔의 측부에 수직하는 밀폐 구간을 형성하도록 상기 경사 구간이 형성된 상기 전지 캔의 개방부의 단부를 가압하는 한 쌍의 제2 롤러; 및상기 전지 캔의 하면에 대해 평행하는 평탄 구간을 형성하도록 상기 경사 구간 및 상기 밀폐 구간이 형성된 상기 전지 캔의 개방부의 측부를 가압하는 한 쌍의 제3 롤러중 적어도 2개의 쌍을 포함하는 것인 다중 롤러 시스템.
- 청구항 2에 있어서,상기 경사 구간은 상기 전지 캔의 중심축을 기준으로 0도 초과 90도 미만의 각도를 이루는 것인 다중 롤러 시스템.
- 청구항 2에 있어서,상기 평탄 구간의 길이는 상기 전지 캔의 직경을 기준으로 5% 이상 30% 이하인 것인 다중 롤러 시스템.
- 청구항 2에 있어서,상기 제2 롤러에 의해 가압되는 압력은 상기 제1 롤러에 의해 가압되는 압력에 대해 101% 이상 300% 이하인 것인 다중 롤러 시스템.
- 이차전지용 전지 캔의 성형 장치로서,전지 캔을 고정하도록 구비된 고정 유닛; 및청구항 1 내지 5 중 어느 한 항에 따른 다중 롤러 시스템을 포함하는 것인 전지 캔의 성형 장치.
- 전지 캔의 성형 방법으로서,전지 캔에 제1 전극, 분리막 및 제2 전극이 순차적으로 적층되어 권취된 구조를 갖는 전극 조립체를 위치시켜 전해액을 주입한 다음, 상기 전지 캔의 개방부에 인접한 측단부에 형성되며 내측을 향해 압입된 비딩부를 갖도록 성형하고, 상기 비딩부에 가스켓과 캡 어셈블리를 적층하는 제1 단계;상기 전지 캔을 고정하는 제2 단계;상기 비딩부 보다 상방의 개방부의 단부를 가압하여, 상기 전지 캔의 개방부의 단부가 상기 전지 캔의 중심축을 향해 기울어진 경사 구간을 형성하는 제3 단계;상기 경사 구간이 형성된 상기 전지 캔의 개방부의 단부를 가압하여 상기 전지 캔의 개방부의 단부가 상기 전지 캔의 측부에 대해 평행하는 밀폐 구간을 형성하는 제4 단계; 및상기 경사 구간 및 상기 밀폐 구간이 형성된 상기 전지 캔의 개방부의 단부를 가압하여 상기 전지 캔의 하면에 대해 평행하는 평탄 구간을 형성하는 제5 단계를 포함하고,상기 제3 단계 내지 제5 단계 중 적어도 2개의 단계는 청구항 1 내지 5 중 어느 한 항에 따른 다중 롤러 시스템을 이용하는 것인 전지 캔의 성형 방법.
- 청구항 7에 있어서,상기 전지 캔의 개방부의 단부의 상기 경사 구간은 상기 전지 캔의 중심축을 기준으로 0도 초과 90도 미만의 각도를 이루는 것인 전지 캔의 성형 방법.
- 청구항 7에 있어서,상기 평탄 구간의 길이는, 상기 전지 캔의 직경을 기준으로 5% 이상 30% 이하인 것인 전지 캔의 성형 방법.
- 청구항 7에 있어서,상기 밀폐 구간을 형성하도록 가압되는 압력은 상기 경사 구간을 형성하도록 가압되는 압력에 대해 101% 이상 300% 이하인 것인 전지 캔의 성형 방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22767404.1A EP4306232A4 (en) | 2021-03-08 | 2022-03-03 | MULTI-ROLLER SYSTEM AND DEVICE AND METHOD FOR PRODUCING A BATTERY BOX |
US18/267,047 US20240055645A1 (en) | 2021-03-08 | 2022-03-03 | Multi-roller system, and device and method for forming battery can |
JP2023536080A JP2024501488A (ja) | 2021-03-08 | 2022-03-03 | 多重ローラーシステム、電池缶の成形装置および成形方法 |
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KR20210030312 | 2021-03-08 | ||
KR10-2021-0030312 | 2021-03-08 |
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WO2022191508A1 true WO2022191508A1 (ko) | 2022-09-15 |
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PCT/KR2022/003052 WO2022191508A1 (ko) | 2021-03-08 | 2022-03-03 | 다중 롤러 시스템, 전지 캔의 성형 장치 및 성형 방법 |
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US (1) | US20240055645A1 (ko) |
EP (1) | EP4306232A4 (ko) |
JP (1) | JP2024501488A (ko) |
KR (1) | KR20220126220A (ko) |
CN (2) | CN115041562A (ko) |
WO (1) | WO2022191508A1 (ko) |
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US20090151863A1 (en) * | 2005-06-16 | 2009-06-18 | Kazutaka Teramoto | Method for manufacturing cylindrical battery and groove-forming processing device of cylindrical battery |
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KR20210030312A (ko) | 2014-10-21 | 2021-03-17 | 삼성디스플레이 주식회사 | 연신이 가능한 유기 발광 표시 장치 |
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DK1882535T3 (da) * | 2006-07-26 | 2010-08-30 | Impress Group Bv | Fremgangsmåde og apparat til formning af en stål-trykbeholder, trykbeholder og en foreløbig form herfor |
JP5396349B2 (ja) * | 2010-08-10 | 2014-01-22 | 日立ビークルエナジー株式会社 | 二次電池 |
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2022
- 2022-03-02 CN CN202210203543.8A patent/CN115041562A/zh active Pending
- 2022-03-02 CN CN202220452520.6U patent/CN217941492U/zh active Active
- 2022-03-03 EP EP22767404.1A patent/EP4306232A4/en active Pending
- 2022-03-03 JP JP2023536080A patent/JP2024501488A/ja active Pending
- 2022-03-03 WO PCT/KR2022/003052 patent/WO2022191508A1/ko active Application Filing
- 2022-03-03 US US18/267,047 patent/US20240055645A1/en active Pending
- 2022-03-03 KR KR1020220027744A patent/KR20220126220A/ko active Search and Examination
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KR20180019453A (ko) * | 2016-08-16 | 2018-02-26 | 기아자동차주식회사 | 스마트 능동제어 헤밍 장치 및 시스템 |
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Also Published As
Publication number | Publication date |
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CN217941492U (zh) | 2022-12-02 |
EP4306232A4 (en) | 2024-07-17 |
EP4306232A1 (en) | 2024-01-17 |
KR20220126220A (ko) | 2022-09-15 |
CN115041562A (zh) | 2022-09-13 |
JP2024501488A (ja) | 2024-01-12 |
US20240055645A1 (en) | 2024-02-15 |
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