WO2023096470A1 - 전극탭 용접 장치 및 전극탭 용접 방법 - Google Patents
전극탭 용접 장치 및 전극탭 용접 방법 Download PDFInfo
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- WO2023096470A1 WO2023096470A1 PCT/KR2022/019107 KR2022019107W WO2023096470A1 WO 2023096470 A1 WO2023096470 A1 WO 2023096470A1 KR 2022019107 W KR2022019107 W KR 2022019107W WO 2023096470 A1 WO2023096470 A1 WO 2023096470A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- rod
- electrode tabs
- tabs
- welding
- Prior art date
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- 238000003466 welding Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims description 30
- 238000003825 pressing Methods 0.000 claims description 33
- 238000000926 separation method Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
- B23K20/106—Features related to sonotrodes
-
- 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
-
- 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
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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
Definitions
- the present invention relates to an electrode tab welding device and an electrode tab welding method.
- a secondary battery means a battery that can be charged and discharged, unlike a primary battery that cannot be charged, and is widely used in electronic devices such as mobile phones, laptop computers, and camcorders, or electric vehicles.
- the lithium secondary battery since the lithium secondary battery has a larger capacity than a nickel-cadmium battery or a nickel-hydrogen battery and has a high energy density, the degree of its utilization is rapidly increasing.
- secondary batteries are classified into cylindrical batteries and prismatic batteries in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type batteries in which the electrode assembly is embedded in a pouch-type case made of an aluminum laminate sheet. It can be.
- the pouch-type secondary battery 1 includes an electrode assembly 10 formed by alternately stacking electrodes and a separator, and a pouch 20 accommodating the electrode assembly 10 therein. Electrode tabs 15 may be connected to the electrodes of the electrode assembly 10 . The electrode tabs 15 may be welded to each other in a predetermined area and then connected to the electrode lead 17 .
- the pouch 20 includes an indented cup portion 21 for accommodating the electrode assembly 10 .
- the cup portion 21 of the pouch 20 may be formed of one or two. 1 illustrates a pouch 20 including a left cup portion and a right cup portion. Around the periphery of the cup portion 21, a peripheral portion 23 (terrace) is formed by sealing.
- the electrode tab 15 when a pulling force is applied to the electrode tab 15 due to the deformation of the peripheral portion 23 of the pouch 20, the electrode tab 15 may be gradually tightened and then disconnected. Alternatively, even when a pulling force is applied to the electrode tab 15 due to the expansion of the pouch 20 , the electrode tab 15 may be gradually tightened and then disconnected. Such disconnection is pointed out as a major cause of fire. In the case of a pouch-type secondary battery, the length of the peripheral part 23 is reduced to increase energy density according to the recent demand for high capacity and high performance, which is By reducing the 'length to the welding point', the risk of disconnection is further increased.
- An object of the present invention is to increase the 'length from the electrode assembly to the welding point of the electrode tabs' of the electrode tab, thereby preventing disconnection of the electrode tab even in a pouch-type secondary battery of high capacity and performance, and an electrode tab welding device and electrode It is to provide a tab welding method.
- an electrode tab welding device relates to an electrode tab welding device that welds electrode tabs protruding from an electrode assembly to each other, and includes a guide unit provided to collect the electrode tabs, and the electrode tabs gathered by the guide unit in a predetermined manner.
- a welding part provided for welding in a welding area, and the guide part faces the electrode assembly so that a length from the electrode assembly to the welding area is increased in at least some of the electrode tabs before welding by the welding part. It may be provided to press the electrode tabs toward the electrode assembly while moving.
- a first rod disposed on any one of the upper and lower sides of the electrode tabs, and the upper side of the electrode tabs and a second rod disposed on the other of the lower side, and the first rod may be provided to move in a proximity direction toward the electrode assembly.
- first and second rods may be provided to move relative to each other in order to adjust a distance between them in the vertical direction.
- the first rod may move in the proximity direction in a state in which the first and second rods move relative to each other to press the electrode tabs in the vertical direction.
- the first rod is disposed on a first rod body provided to move in the proximity direction, and at an end facing the electrode tabs among upper and lower ends of the first rod body, and moves in the proximity direction.
- a first rod roller provided to rotate while contacting an electrode tab positioned closest to one of the electrode tabs may be included.
- the second rod may be connected to a second rod body provided to move in the proximity direction in conjunction with the first rod body, and an end of an upper end and a lower end of the second rod body toward the electrode tabs.
- a second load roller may be included.
- the guide part when the guide part considers that the electrodes and separators of the electrode assembly are stacked in a vertical direction perpendicular to the ground, a first rod part disposed on one of the upper and lower sides of the electrode tabs, and the electrode tab and a second rod part disposed on the other of upper and lower sides of the electrode tabs, wherein the first rod part moves toward a first pressing rod for pressing the electrode tabs in the vertical direction and the electrode assembly and moves toward the electrode tabs. and a first moving roller provided to pull at least a portion of the electrode toward the electrode assembly, and the second rod part relatively moves in the vertical direction with respect to the first rod to hold the electrode tabs together with the first pressing rod.
- a second pressing rod for pressing in the vertical direction may be included.
- the second rod part is provided to move toward the electrode assembly in conjunction with the first moving roller in a state in which the electrode tabs are pressed in the vertical direction by the first and second pressing rods. It may further include 2 moving rollers.
- an electrode tab welding method relates to an electrode tab welding method of welding electrode tabs protruding from an electrode assembly to each other, (a) the electrode and the separator of the electrode assembly are stacked in a vertical direction perpendicular to the ground. pressurizing the electrode tabs from upper and lower sides to gather the electrode tabs, pressing the electrode tabs toward the electrode assembly in a state in which the electrode tabs are gathered so that at least some of the electrode tabs are directed toward the electrode assembly. It may include pulling, and welding the electrode tabs in a predetermined welding area after the pulling.
- At least some of the electrode tabs may be welded in a state in which a length from the electrode assembly to the welding region is increased by the pulling.
- a first rod disposed on one of the upper and lower sides of the electrode tabs moves toward the electrode assembly and presses at least some of the electrode tabs toward the electrode assembly. may be a step.
- the step (a) may be a step in which a second rod disposed on the other of the upper and lower sides of the electrode tabs presses the electrode tabs from the upper and lower sides together with the first rod.
- the first rod is provided to move upward or downward in a proximity direction, which is a direction toward the electrode assembly, and in a separation direction, which is a direction away from the electrode assembly, and when moving in the proximity direction, It may include a first rod roller provided to rotate while contacting an electrode tab located closest among the electrode tabs.
- the length from the electrode assembly to the welding area can be increased in at least some of the electrode tabs by welding the electrode tabs after pulling at least some of the electrode tabs toward the electrode assembly, thus manufacturing according to the present invention
- the electrode tab may not be disconnected.
- FIG. 1 is a diagram showing an example of a pouch type secondary battery.
- FIGS. 2A to 2D are diagrams for explaining one exemplary process that may be applied to welding electrode tabs of a pouch type secondary battery.
- FIG. 3 is a cross-sectional view showing a portion of a battery module in which several pouch-type batteries are accommodated in a case.
- FIG. 4 is a view showing an electrode tab welding apparatus according to a first embodiment of the present invention.
- 5A to 5E are views for explaining a method of welding electrode tabs using the welding apparatus of FIG. 4 .
- FIG. 6 is a view showing an electrode tab welding apparatus according to a second embodiment of the present invention.
- FIG. 2 is a diagram for explaining an exemplary process that can be applied to welding electrode tabs of a pouch type secondary battery.
- the electrode assembly 10 is prepared as shown in FIG. 2 (a).
- the electrode assembly 10 may be provided by stacking electrodes 11 and separators 13 .
- the electrode 11 includes an anode and a cathode.
- An electrode tab 15 may be connected to the electrode 11 .
- the positive electrode tab connected to the positive electrode may also be provided in the electrode assembly 10 to extend in a direction different from the extension direction of the negative electrode tab 15 and may be welded in the same manner as the negative electrode tab.
- the electrode tabs 15 are gathered as shown in FIG. 2(b).
- the electrode tabs 15 may be gathered by pressing the electrode tabs 15 with two rods 30A and 30B.
- the electrode tabs 15 are welded through the welding part 120 as shown in FIG. 2(c).
- an electrode assembly 10 having electrode tabs 15 welded to each other in a predetermined welding area W can be manufactured.
- the pouch type battery 1 may be manufactured by accommodating the electrode assembly 10 in a pouch 20 (see FIG. 1).
- FIG. 3 is a cross-sectional view showing a portion of a battery module in which several pouch-type batteries are accommodated in a case.
- the peripheral portion 23 of the pouch 20 may be bent during manufacturing of the battery module. Deformation of the peripheral portion 23 may cause the electrode lead 17 to bend, thereby causing a pulling force on the electrode tab 15 connected to the electrode lead 17 (eg, refer to the electrode tab 15a in FIG. 3). ). Such force may pull the electrode tab 15 taut and cause disconnection of the electrode tab 15 . This force may appear larger in the outer electrode tab 15a. Even when the battery expands, the above problem of disconnection may be caused.
- the present invention which will be described in detail below, is to solve the above problem of disconnection.
- the electrode tab welding device according to the first embodiment of the present invention relates to a device for welding electrode tabs 15 protruding from an electrode assembly 10 to each other, and as shown in FIG. 4, the guide part 110 and the welding part ( 120).
- the electrode 11 and the separator 13 of the electrode assembly 10 are stacked in a vertical direction perpendicular to the ground.
- this is exemplary and the stacking direction of the electrode 11 and the separator 13 may vary depending on the direction in which the electrode assembly 10 is viewed.
- the guide part 110 may be provided to collect the electrode tabs 15 .
- the guide part 110 includes the first rod 111 disposed on one of the upper and lower sides of the electrode tabs 15 and the other one of the upper and lower sides of the electrode tabs 15.
- a second rod 112 may be included. 4 illustrates the first rod 111 disposed on the upper side and the second rod 112 disposed on the lower side. The first and second rods 111 and 112 may gather the electrode tabs 15 in a predetermined area G.
- the first and second rods 111 and 112 may move relative to each other in a vertical direction. For example, in the stopped state of the second rod 112, only the first rod 111 can move toward the second rod 112, or in the stopped state of the first rod 111, the second rod 112 Only the first rod 111 can move toward, or the first and second rods 111 and 112 can move towards each other.
- the distance between the first and second rods 111 and 112 may be adjusted by relative movement of the first and second rods 111 and 112 .
- the electrode tabs 15 may be vertically pressed by the first and second rods 111 and 112 . Due to this pressure, the electrode tabs 15 may be gathered in a predetermined area G. In this process, the electrode tabs 15 may be bent toward a predetermined region (G).
- the welding portion 120 may be provided to weld the electrode tabs 15 collected by the guide portion 110 in a predetermined welding area W.
- the welding unit 120 may include a horn and an anvil for performing ultrasonic welding.
- Electrode leads 17 (see FIG. 1) for supplying electricity to the outside of the battery may be welded to the electrode tabs 15 welded by the welding part 120 .
- the guide part 110 of this embodiment may press the electrode tabs 15 toward the electrode assembly 10 while moving toward the electrode assembly 10 before welding by the welding part 120 . Due to this pressure, the guide part 110 may increase the reference length L of all or part of the electrode tabs 15 .
- the reference length L may be 'the length from the electrode assembly 10 to the welding area W' of the electrode tab 15 .
- the first and second rods 111 and 112 are directed toward the electrode assembly 10.
- the electrode tabs 15 may be pulled toward the electrode assembly 10 by pressing by the first and second rods 111 and 112, and thus the 'electrode assembly' of the electrode tab 15
- the length (L)' from (10) to the welding area (W) may be increased.
- the remaining portion of the electrode tab 15 eg, the right portion of the welding region W in FIG. 4
- only the first rod 111 may move toward the electrode assembly 10 .
- the guide part 110 may press the electrode tabs 15 to a degree that allows the electrode tabs 15 to be pulled.
- the electrode tabs 15 are welded in such a pulled state or after the pulled state, at least some of the electrode tabs 15 (e.g., the electrode tab of reference numeral 15b in FIG. 4) are welded in the 'electrode assembly 10'.
- the length (L)' to (W) can be increased. Such an increase in length can prevent or slow down disconnection caused by the electrode tab 15 being pulled tight. This is because, due to the length increase, the electrode tab 15 will be taut only if the electrode tab 15 is pulled more than before the length increase.
- the force applied to the electrode leads 17 may be transferred to the electrode tabs 15 through a connection point between the electrode tabs 15 and the electrode lead 17 .
- the pull of the electrode tab 15 may increase as the electrode tab (eg, the electrode tab of 15b) is located on the outer side (eg, the upper or lower side with respect to FIG. 4 ). This is because the outer electrode tab 15 is greatly pressed by the guide part 110 .
- the length L from the electrode assembly 10 to the welding area W is increased in at least some of the electrode tabs 15 before welding by the welding portion 120, the electrode
- the guide portion 110 since the guide portion 110 is provided to press the electrode tabs 15 toward the electrode assembly 10 while moving toward the assembly 10. , Even if a pulling force is applied to the electrode tab 15 due to deformation of the peripheral portion 23 (terrace) of the pouch 20, or even if a pulling force is applied to the electrode tab 15 due to expansion of the battery, the electrode tab 15 ) may not be disconnected.
- the guide unit 110 of this embodiment may determine the degree of pulling of the electrode tab 15 in consideration of the increase in length required to prevent disconnection. For example, in the case of a battery module in which the periphery of the pouch 20 is greatly deformed, the guide part 110 may move toward the electrode assembly 10 more. In this way, the guide unit 110 can control the amount of pulling of the electrode tab 15, that is, the degree of increase in the reference length L, by adjusting the distance that the guide unit 110 moves toward the electrode assembly 10.
- the first rod 111 may include a first rod body 111a provided to move in a direction toward the electrode assembly 10 .
- a direction toward the electrode assembly 10 eg, a left direction with respect to FIG. 4
- the first rod body 111a may be a bar or block that rotatably supports the first rod roller 111b to be described later. This is also the same for the second rod body 112a to be described later.
- the first rod 111 may move not only in the proximity direction but also in the direction away from the electrode assembly 10 (eg, in the right direction with reference to FIG. 4 ) in the separation direction. This is also the same for the second rod 112.
- the first rod 111 may include a first rod roller 111b disposed at the lower end of the first rod body 111a.
- the first rod roller 111b moves in the proximity direction, it may contact and rotate with an electrode tab located closest among the electrode tabs 15 (eg, the electrode tab located at the uppermost side in FIG. 4 ).
- the first rod roller 111b may move toward the electrode assembly 10 in a state of being in contact with the uppermost electrode tab 15b, and may rotate by friction with the electrode tab 15b.
- the electrode tab 15 can be pressed without damage to the electrode tab 15.
- the first rod roller 111b moves the electrode tabs 15 between the upper and lower ends of the first rod body 111a. It may be placed at the lower end, which is the end toward which it is directed. When the first rod is disposed below the electrode tabs, the first rod roller may be disposed at an upper end of the first rod body.
- the second rod 112 may also include a second rod body 112a provided to move in the proximity direction.
- the second rod body 112a may move in conjunction with the first rod body 111a.
- the second rod body 112a presses the electrode tabs 15 by the first rod roller 111b and the second rod roller 112b, which will be described later, while the first rod body 111a When is moving in the proximity direction, may move in the proximity direction together with the first rod body (111a).
- the second rod 112 may also include a second rod roller 112b disposed at an end facing the electrode tabs 15 among the upper and lower ends of the second rod body 112a.
- 4 illustrates a second rod roller 112b disposed at an upper end of the second rod body 112a.
- the second rod roller 112b is positioned closest to the electrode tabs 15 in a state of pressing the electrode tabs 15 in the vertical direction together with the first rod roller 111b when moving in the proximity direction. It may rotate while contacting an electrode tab (eg, the electrode tab positioned at the bottommost side in FIG. 4 ).
- FIG. 5 is a view for explaining a method of welding electrode tabs using the welding apparatus of FIG. 4 .
- the electrode assembly 10 is prepared as shown in FIG. 5 (a). At this time, the electrode assembly 10 may be seated on the seating portion 140 .
- the seating portion 140 may be a jig or die on which the electrode assembly 10 can be seated.
- the electrode tabs 15 are assembled as shown in FIG. 5(b). This may be implemented by the operation of the guide unit 110.
- the electrode tabs 15 may be gathered in a predetermined area G while the first and second rods 111 and 112 respectively move toward each other.
- the first rod 111 presses the electrode tabs 15 from the upper side to the lower side, thereby pushing the electrode tabs 15 to a predetermined level. It can also be collected in an area. In this way, the electrode tabs 15 may be gathered by pressing the electrode tabs 15 from the upper and lower sides.
- the electrode tabs 15 are pressed toward the electrode assembly 10 in a state in which the electrode tabs 15 are gathered together. Due to this pressure, at least some of the electrode tabs 15 may be pulled toward the electrode assembly 10 .
- This may be implemented by the operation of the guide unit 110.
- the first and second rod rollers 111b and 112b may press the electrode tabs 15 in a vertical direction according to the vertical movement of the first and second rod bodies 111a and 112a.
- the first and second rod rollers 111b and 112b may press the electrode tabs 15 toward the electrode assembly 10 according to the horizontal movement of the first and second rod bodies 111a and 112a. there is. Due to this pressure, at least some of the electrode tabs 15 (eg, electrode tabs positioned at the uppermost or lowermost side in FIG. 4 ) may be pulled toward the electrode assembly 10 .
- the electrode tabs 15 are welded in the welding area W through the welding portion 120 in a pulled state of the electrode tab 15 .
- the 'length from the electrode assembly 10 to the welding area W (L, see FIG. 5d)' can be increased, and in this state, the electrode tabs (15) can be welded together.
- the electrode tabs 15 eg, the electrode tab of reference numeral 15c
- the welding area (W ) can be increased.
- the electrode tab 15 is located closer to the guide part 110, the above length increase may be greater.
- Example 6 is a view showing an electrode tab welding apparatus according to a second embodiment of the present invention.
- the welding device of Example 2 is different from the welding device of Example 1 in the guide part.
- the guide portion of Example 2 will be mainly described.
- the matters described in Example 1 may be applied to Example 2 in the same or similar manner.
- the guide part 210 may include a first rod part 211 disposed on one of the upper and lower sides of the electrode tabs 15 . 6 illustrates the first rod part 211 disposed above the electrode tabs 15 .
- the guide part 210 may include a second rod part 212 disposed on the other of upper and lower sides of the electrode tabs 15 . 6 illustrates the second rod part 212 disposed below the electrode tabs 15 .
- the first rod part 211 may include a first pressing rod 211a for pressing the electrode tabs 15 in a vertical direction.
- FIG. 6 illustrates a first pressing rod 211a disposed above the electrode tabs 15 and pressurizing the electrode tabs 15 by descending downward.
- the first pressing rod 211a may be implemented in various shapes capable of pressing the electrode tabs 15 .
- 6 illustrates a rod-shaped first pressing rod 211a having a convex lower end.
- the first pressing rod 211a may descend to approach the electrode tabs 15 or ascend to move away from the electrode tabs 15 .
- the contents of the first pressing rod 211a may be equally or similarly applied to the second pressing rod 212a to be described later.
- the first rod part 211 may include a first moving roller 211b provided to move toward the electrode assembly 10 and pull at least some of the electrode tabs 15 toward the electrode assembly 10 . .
- the first moving roller 211b may be implemented in various shapes capable of pulling the electrode tab 15 .
- 6 illustrates a roller-shaped first moving roller 211b.
- the first moving roller 211b moves in a direction approaching the electrode assembly 10 (eg, in a left direction with reference to FIG. 6 ) and in a direction away from the electrode assembly 10 (eg, in a right direction with reference to FIG. 6 ). can move
- the first moving roller 211b may move downward to approach the electrode tab 15 or upward to move away from the electrode tab 15 .
- the contents of the first moving roller 211b may be equally or similarly applied to the second moving roller 212b to be described later.
- the second rod part 212 is a second pressure rod for vertically pressing the electrode tabs 15 together with the first pressure rod 211a by moving relative to the first pressure rod 211a in the vertical direction ( 212a) may be included. Relative movement of the second pressure rod 212a occurs when the second pressure rod 212a moves toward the first pressure rod 211a in a stationary state of the first pressure rod 211a, or when the second pressure rod 212a moves toward the first pressure rod 211a. ) In the stationary state, the first pressure rod 211a moves toward the second pressure rod 212a, or the first and second pressure rods 211a and 212a move toward each other. It can be. Due to the relative movement of the first and second pressing rods 211a and 212a, the electrode tabs 15 may be pressed in a vertical direction, whereby the electrode tabs 15 may be gathered in a predetermined area.
- the second rod part 212 interlocks with the first moving roller 211b in a state in which the electrode tabs 15 are pressed in the vertical direction by the first and second pressing rods 211a and 212a to form an electrode assembly ( 10) may include a second moving roller 212b provided to move toward.
- the second moving roller 212b may also move together.
- the first and second moving rollers 211b and 212b together move the electrode By moving toward the assembly 10, at least some of the electrode tabs 15 (eg, electrode tabs positioned at the uppermost or lowermost among the electrode tabs) from the 'electrode assembly 10 to the welding (scheduled) area.
- the length of 'can be increased. After this increase in length, the welding portion 120 may weld the electrode tabs 15 in the welding area.
- first and second moving rollers 211b and 212b may move toward the electrode assembly 10 after being spaced apart from the electrode tabs 15 in the vertical direction and approaching the electrode tabs 15 . It may also be considered that the guide part 210 includes only the first moving roller 211b and presses the electrode tab 15 only with the first moving roller 211b.
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Abstract
Description
Claims (13)
- 전극 조립체에서 돌출된 전극탭들을 서로 용접시키는 전극탭 용접 장치에 있어서,상기 전극탭들을 모으도록 마련되는 가이드부; 및상기 가이드부에 의해 모아진 전극탭들을 소정의 용접 영역에서 용접하게 마련되는 용접부를 포함하고,상기 가이드부는,상기 용접부에 의한 용접 전에, 상기 전극탭들 중 적어도 일부에 있어 상기 전극 조립체에서 상기 용접 영역까지의 길이가 증가되게, 상기 전극 조립체를 향해 이동하면서 상기 전극탭들을 상기 전극 조립체를 향해 가압하게 마련되는, 전극탭 용접 장치.
- 청구항 1에 있어서,상기 가이드부는,상기 전극 조립체의 전극과 분리막이 지면에 수직한 연직 방향으로 적층되어 있다고 볼 때, 상기 전극탭들의 상측과 하측 중 어느 하나에 배치되는 제1 로드와, 상기 전극탭들의 상측과 하측 중 다른 하나에 배치되는 제2 로드를 포함하고,상기 제1 로드는,상기 전극 조립체를 향하는 방향인 근접 방향으로 이동하게 마련되는, 전극탭 용접 장치.
- 청구항 2에 있어서,상기 제1 및 제2 로드는,상기 연직 방향으로 서로 간의 거리를 조절하기 위해 서로를 향해 상대 이동하게 마련되는, 전극탭 용접 장치.
- 청구항 3에 있어서,상기 제1 로드는,상기 제1 및 제2 로드가 서로를 향해 상대 이동하여 상기 전극탭들을 상기 연직 방향으로 가압시킨 상태에서 상기 근접 방향으로 이동하게 마련되는, 전극탭 용접 장치.
- 청구항 2에 있어서,상기 제1 로드는,상기 근접 방향으로 이동하게 마련되는 제1 로드 바디; 및상기 제1 로드 바디의 상측 말단과 하측 말단 중 상기 전극탭들을 향하는 말단에 배치되어, 상기 근접 방향으로 이동 시에, 상기 전극탭들 중 가장 근접하게 위치하는 전극탭과 접촉하며 회전하게 마련되는 제1 로드 롤러를 포함하는, 전극탭 용접 장치.
- 청구항 5에 있어서,상기 제2 로드는,상기 제1 로드 바디와 연동하여 상기 근접 방향으로 이동하게 마련되는 제2 로드 바디; 및상기 제2 로드 바디의 상측 말단과 하측 말단 중 상기 전극탭들을 향하는 말단에 배치되어, 상기 근접 방향으로 이동 시에, 상기 제1 로드 롤러와 함께 상기 전극탭들을 상기 연직 방향으로 가압시킨 상태에서, 상기 전극탭들 중 가장 근접하게 위치하는 전극탭과 접촉하며 회전하게 마련되는 제2 로드 롤러를 포함하는, 전극탭 용접 장치.
- 청구항 1에 있어서,상기 가이드부는,상기 전극 조립체의 전극과 분리막이 지면에 수직한 연직 방향으로 적층되어 있다고 볼 때, 상기 전극탭들의 상측과 하측 중 어느 하나에 배치되는 제1 로드부와, 상기 전극탭들의 상측과 하측 중 다른 하나에 배치되는 제2 로드부를 포함하고,상기 제1 로드부는,상기 전극탭들을 상기 연직 방향으로 가압하기 위한 제1 가압 로드와, 상기 전극 조립체를 향해 이동하며 상기 전극탭들 중 적어도 일부를 상기 전극 조립체를 향해 당기도록 마련되는 제1 이동 롤러를 포함하고,상기 제2 로드부는,상기 제1 가압 로드에 대해 상기 연직 방향으로 상대 이동하여 상기 제1 가압 로드와 함께 상기 전극탭들을 상기 연직 방향으로 가압하기 위한 제2 가압 로드를 포함하는, 전극탭 용접 장치.
- 청구항 7에 있어서,상기 제2 로드부는,상기 제1 및 제2 가압 로드에 의해 상기 전극탭들이 상기 연직 방향으로 가압된 상태에서, 상기 제1 이동 롤러와 연동하여 상기 전극 조립체를 향해 이동하게 마련되는 제2 이동 롤러를 더 포함하는, 전극탭 용접 장치.
- 전극 조립체에서 돌출된 전극탭들을 서로 용접시키는 전극탭 용접 방법에 있어서,(a) 상기 전극 조립체의 전극과 분리막이 지면에 수직한 연직 방향으로 적층되어 있다고 볼 때, 상기 전극탭들을 상측과 하측에서 가압하여 상기 전극탭들을 모으는 단계;(b) 상기 전극탭들을 모은 상태에서 상기 전극탭들을 상기 전극 조립체를 향해 가압하여 상기 전극탭들 중 적어도 일부를 상기 전극 조립체를 향해 당기는 단계; 및(c) 상기 당김 후에 상기 전극탭들을 소정의 용접 영역에서 용접하는 단계를 포함하는, 전극탭 용접 방법.
- 청구항 9에 있어서,상기 전극탭들 중 상기 적어도 일부는,상기 당김에 의해서 상기 전극 조립체에서 상기 용접 영역까지의 길이가 증가된 상태에서 용접되는, 전극탭 용접 방법.
- 청구항 9에 있어서,상기 단계 (b)는,상기 전극탭들의 상측과 하측 중 어느 하나에 배치되는 제1 로드가 상기 전극 조립체를 향해 이동하며 상기 전극탭들 중 상기 적어도 일부를 상기 전극 조립체를 향해 가압하는 단계인, 전극탭 용접 방법.
- 청구항 11에 있어서,상기 단계 (a)는,상기 전극탭들의 상측과 하측 중 다른 하나에 배치되는 제2 로드가 상기 제1 로드와 함께 상기 전극탭들을 상측과 하측에서 가압하는 단계인, 전극탭 용접 방법.
- 청구항 12에 있어서,상기 제1 로드는,상기 전극 조립체를 향하는 방향인 근접 방향과 상기 전극 조립체로부터 멀어지는 방향인 이격 방향으로, 그리고 상방 또는 하방으로 이동하게 마련되고, 또한 상기 근접 방향으로 이동 시에, 상기 전극탭들 중 가장 근접하게 위치하는 전극탭과 접촉하며 회전하게 마련되는 제1 로드 롤러를 포함하는, 전극탭 용접 방법.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013165037A (ja) * | 2012-02-13 | 2013-08-22 | Nissan Motor Co Ltd | 電池押圧装置および電池押圧方法 |
KR20170046910A (ko) * | 2015-10-22 | 2017-05-04 | 제일특수소재주식회사 | 이차전지용 전극탭 접합장치 |
KR20180072065A (ko) * | 2016-12-21 | 2018-06-29 | 주식회사 엘지화학 | 전지셀 및 이의 제조방법 |
KR20190054617A (ko) * | 2017-11-14 | 2019-05-22 | 주식회사 엘지화학 | 전극 조립체, 이를 포함하는 이차전지 및 그 제조방법 |
JP2019207861A (ja) * | 2018-05-29 | 2019-12-05 | 株式会社豊田自動織機 | 蓄電装置の製造方法及び蓄電装置製造用の治具 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013165037A (ja) * | 2012-02-13 | 2013-08-22 | Nissan Motor Co Ltd | 電池押圧装置および電池押圧方法 |
KR20170046910A (ko) * | 2015-10-22 | 2017-05-04 | 제일특수소재주식회사 | 이차전지용 전극탭 접합장치 |
KR20180072065A (ko) * | 2016-12-21 | 2018-06-29 | 주식회사 엘지화학 | 전지셀 및 이의 제조방법 |
KR20190054617A (ko) * | 2017-11-14 | 2019-05-22 | 주식회사 엘지화학 | 전극 조립체, 이를 포함하는 이차전지 및 그 제조방법 |
JP2019207861A (ja) * | 2018-05-29 | 2019-12-05 | 株式会社豊田自動織機 | 蓄電装置の製造方法及び蓄電装置製造用の治具 |
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