Electrode assembly processing device capable of easily removing foreign substances, and electrode assembly processing method using same

Abstract

The present invention relates to an electrode assembly processing device capable of easily removing foreign substances, and an electrode assembly processing method using same, and, particularly, to an electrode assembly processing device capable of easily removing foreign substances, and an electrode assembly processing method using same, the device comprising: a seating jig on which an electrode assembly to which an electrode lead is connected is seated; a bead processing unit positioned on the upper side of a bead part formed on the electrode lead, so as to process the bead part; a pressing support unit positioned on the lower side of the bead part; and air injection units positioned on each of upper and lower portions of the electrode assembly so as to inject air toward the bead processing unit.

Description

Electrode assembly processing device for easy removal of foreign substances and electrode assembly processing method using the same

[0001] This application claims the benefit of priority to Korean Patent Application No. 2024-0114464, filed August 26, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to an electrode assembly processing device capable of easily removing foreign substances and an electrode assembly processing method using the same, and more particularly, to an electrode assembly processing device capable of easily removing foreign substances and an electrode assembly processing method using the same, which can improve quality by removing foreign substances near a bead portion formed by welding an electrode tab and an electrode lead.

[0003] Recently, due to the development of alternative energy sources to address air pollution and energy depletion caused by the use of fossil fuels, demand for secondary batteries that can store generated electric energy is increasing.

[0004] Secondary batteries, the energy source for various electronic devices indispensable in modern society, are seeing increased capacity requirements due to the increasing use and complexity of mobile devices and the development of electric vehicles. To meet user demand, small devices are equipped with multiple battery cells. However, automobiles and other devices utilize battery modules, which electrically connect multiple battery cells, or battery packs comprising multiple such modules.

[0005] Meanwhile, in the battery cell manufacturing process, the electrode assembly formed by stacking electrodes and separators is formed by gathering the electrode tabs protruding from each electrode to form a bundle of electrode tabs, and welding electrode leads to the bundle of electrode tabs.

[0006] In this way, a bead having a certain volume is formed at the location where the electrode tab bundle and electrode lead are welded, and pressure is applied to this bead. At this time, foreign substances may be present in the bead, and foreign substances due to the pressure applied to the bead may attach to the electrode assembly, etc., causing defects and deterioration in the quality of the battery cell.

[0007] Figure 1 is a schematic diagram illustrating a method for reducing the height of a protruding weld bead at a welded portion of an electrode tab and an electrode lead according to a prior art.

[0008] As shown in Fig. 1, a method for reducing the height of a welding bead according to the prior art reduces the height by pressing a welding bead (30) generated by welding an electrode tab (10) and an electrode lead (20) through a press (40).

[0009] The method of reducing the height of the welding bead according to the conventional technology has a problem in that foreign substances generated during welding of the electrode tab (10) and the electrode lead (20) and foreign substances generated in the welding bead (30) due to pressure by the press (40) may flow in the direction of the electrode assembly or the battery cell may be formed with the foreign substances remaining, which may cause problems such as defects and quality deterioration.

[0010] (Prior art literature)

[0011] (Patent Document 1) Korean Patent Publication No. 2022-0037051

[0012] In order to solve the above problems, the present invention aims to provide an electrode assembly processing device capable of easily removing foreign substances that can pressurize a bead portion while removing foreign substances that may occur before and after pressing during the process of pressing the bead portion, and an electrode assembly processing method using the same.

[0013] In order to achieve the above purpose, the electrode assembly processing device according to the present invention is characterized by including a mounting jig (100) on which an electrode assembly (C) to which an electrode lead (L) is connected is mounted, a bead processing unit (200) positioned above a bead portion (B) formed on the electrode lead (L) and processing the bead portion (B), a pressure support unit (300) positioned below the bead portion (B), and an air injection unit (400) positioned at the upper and lower portions of the electrode assembly (C) respectively and spraying air toward the bead processing unit (200).

[0014] In addition, in the electrode assembly processing device according to the present invention, the bead processing unit (200) is formed to be extended by a certain length and includes a foreign matter removal unit (210) that removes foreign matters near the bead portion (B), a bead pressurizing unit (220) that is connected to the foreign matter removal unit (210) and extends in a vertical direction and presses the bead portion (B), and a motor unit (230) that can change the position by rotating the foreign matter removal unit (210) and the bead pressurizing unit (220).

[0015] In addition, in the electrode assembly processing device according to the present invention, the foreign matter removal unit (210) is characterized by being a roller brush that is rotatable and has a plurality of hairs formed thereon.

[0016] In addition, in the electrode assembly processing device according to the present invention, the foreign matter removal unit (210) is characterized in that it is an air injection device that injects air.

[0017] In addition, the electrode assembly processing device according to the present invention is characterized by including an air suction unit (500) that is positioned apart from the bead processing unit (200) and sucks in air.

[0018] In addition, in the electrode assembly processing device according to the present invention, the electrode assembly (C) is characterized in that it is mounted on the mounting jig (100) so that one side portion protrudes.

[0019] In addition, in the electrode assembly processing device according to the present invention, the air injection unit (400) includes an upper air injection unit (410) located on one upper side of the electrode assembly (C) and a lower air injection unit (420) located on one lower side of the electrode assembly (C), and the upper air injection unit (410) is characterized in that a first air flow path unit (411) through which air moves is formed inside, and the lower air injection unit (420) is characterized in that a second air flow path unit (421) through which air moves is formed inside.

[0020] In addition, in the electrode assembly processing device according to the present invention, the first air flow path (411) and the second air flow path (421) are characterized in that the outlet for spraying air has a slit shape.

[0021] In addition, in the electrode assembly processing device according to the present invention, the first air flow path part (411) and the second air flow path part (421) are characterized in that the direction in which air is sprayed is bent at a certain angle so that air can be sprayed toward the bead part (B).

[0022] In addition, in the electrode assembly processing device according to the present invention, the air intake part (500) is formed with an air intake path (510) for intake of air, and the air intake path (510) is characterized in that the intake port for intake of air is bent at a certain angle so that it faces the bead part (B).

[0023] In addition, in the electrode assembly processing device according to the present invention, the lower part of the air intake passage (510) is characterized by having a shape in which the width becomes narrower as it goes inward from the intake port.

[0024] In addition, the electrode assembly processing method using the electrode assembly processing device according to the present invention is characterized by including a first step of mounting an electrode assembly with electrode leads connected to a mounting jig, a second step of spraying air toward a bead portion through an air spray portion, a third step of removing foreign substances from the bead portion and applying pressure through a bead processing portion, and a fourth step of transporting the processed electrode assembly.

[0025] As described above, the electrode assembly processing device and electrode assembly processing method using the same according to the present invention, which are capable of easily removing foreign substances, have an advantage in that foreign substances in the bead portion can be easily removed, as the device comprises a bead processing unit including a foreign substance removal unit capable of removing foreign substances in the bead portion.

[0026] In addition, the electrode assembly processing device and electrode assembly processing method using the same, which are easy to remove foreign substances according to the present invention, have the advantage of being able to prevent foreign substances from flowing in and attaching toward the electrode assembly by having the air injection unit spray air in the direction of the bead unit.

[0027] In addition, the electrode assembly processing device and electrode assembly processing method using the same according to the present invention, which are easy to remove foreign substances, have an advantage in that foreign substances generated in the bead portion can be more easily removed because they are equipped with an air intake section that sucks in air.

[0028] Figure 1 is a schematic diagram illustrating a method for reducing the height of a protruding weld bead at a welded portion of an electrode tab and an electrode lead according to a prior art.

[0029] Figure 2 is a perspective view showing an electrode assembly processing device according to a preferred first embodiment of the present invention.

[0030] Figure 3 is a cross-sectional view showing an electrode assembly processing device according to a preferred first embodiment of the present invention.

[0031] Figure 4 is a perspective view showing an electrode assembly processing device according to a preferred second embodiment of the present invention.

[0032] Figure 5 is a cross-sectional view showing an electrode assembly processing device according to a preferred second embodiment of the present invention.

[0033] Figure 6 is a perspective view showing an electrode assembly processing device according to a preferred third embodiment of the present invention.

[0034] Fig. 7 is a cross-sectional view showing an electrode assembly processing device according to a preferred third embodiment of the present invention.

[0035] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the gist of the present invention, such detailed descriptions will be omitted.

[0036] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0037] Hereinafter, an electrode assembly processing device that facilitates the removal of foreign substances according to the present invention and an electrode assembly processing method using the same will be described with reference to the attached drawings.

[0038] FIG. 2 is a perspective view showing an electrode assembly processing device according to a preferred first embodiment of the present invention, and FIG. 3 is a cross-sectional view showing an electrode assembly processing device according to a preferred first embodiment of the present invention.

[0039] Referring to FIGS. 2 and 3, an electrode assembly processing device according to a preferred first embodiment of the present invention is configured to include a mounting jig (100), a bead processing unit (200), a pressure support unit (300), and an air injection unit (400).

[0040] First, the fixing jig (100) may be a worktable with a flat upper surface on which the electrode assembly (C) for processing the bead portion (B) is fixed, and there are no particular restrictions as long as the electrode assembly (C) is fixed and the process of pressing the bead portion (B) can be performed.

[0041] At this time, the electrode assembly (C) can be installed so that one side portion protrudes from the upper surface of the installation jig (100), which is to ensure that the lower air injection portion (420) of the air injection portion (400) described later is positioned below one side portion of the electrode assembly (C).

[0042] Here, the electrode assembly (C) has a structure in which positive and negative electrodes are alternately laminated multiple times with a separator in between, and may have a shape in which electrode tabs composed of positive and negative tabs protrude.

[0043] The positive electrode is manufactured by applying a positive electrode mixture containing a positive electrode active material onto a positive electrode current collector and then drying the mixture. The positive electrode mixture may optionally further include a binder, a conductive agent, a filler, etc., as needed.

[0044] The positive electrode current collector can generally have a thickness of 3 to 500 ㎛. The positive electrode current collector is not particularly limited as long as it has high conductivity and does not cause chemical changes in the battery. For example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. can be used. In addition, the positive electrode current collector can form fine unevenness on the surface to increase the adhesiveness of the positive electrode active material, and various forms such as a film, sheet, foil, net, porous body, foam, or non-woven fabric can be used.

[0045] The cathode active material may be a layered compound such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or a compound substituted with one or more transition metals; chemical formula Li. 1+x Mn 2-x Lithium manganese oxides such as O4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, LiMnO2; lithium copper oxide (Li2CuO2); vanadium oxides such as LiV3O8, V2O5, Cu2V2O7; chemical formula LiNi 1-x M x Ni-site type lithium nickel oxide represented by O2 (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); chemical formula LiMn 2-x M x Lithium manganese composite oxides represented by O2 (wherein, M = Co, Ni, Fe, Cr, Zn or Ta, and x = 0.01 to 0.1) or Li2Mn3MO8 (wherein, M = Fe, Co, Ni, Cu or Zn); LiMn2O4 in which a portion of the Li in the chemical formula is replaced by an alkaline earth metal ion; disulfide compounds; Fe2(MoO4)3, etc., but are not limited thereto.

[0046] The negative electrode is manufactured by applying a negative electrode mixture containing a negative electrode active material onto a negative electrode current collector and then drying the mixture. The negative electrode mixture may include components such as a conductive agent, a binder, and a filler, as needed.

[0047] The negative electrode current collector is generally made with a thickness of 3 to 500 ㎛. The negative electrode current collector is not particularly limited as long as it has high conductivity and does not cause chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel surface-treated with carbon, nickel, titanium, silver, etc., aluminum-cadmium alloy, etc. can be used. In addition, like the positive electrode current collector, the bonding strength of the negative electrode active material can be strengthened by forming fine irregularities on the surface, and it can be used in various forms such as a film, sheet, foil, net, porous body, foam, non-woven fabric, etc.

[0048] The separator prevents short circuits between the aforementioned negative and positive electrodes and allows only the movement of lithium ions, and an insulating thin film with high ion permeability and mechanical strength is used. The pore diameter of the separator is generally 0.01 to 10 ㎛, and the thickness is generally 5 to 300 ㎛. The material of the separator is preferably one selected from among polyethylene, polypropylene, a polyethylene / polypropylene double layer, a polyethylene / polypropylene / polyethylene triple layer, a polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0049] Meanwhile, the negative current collector and the positive current collector are composed of a portion coated with a slurry containing an active material and a non-coated portion where the slurry is not coated. The non-coated portion is formed by cutting the portion or connecting a separate conductive member to the non-coated portion by ultrasonic welding, etc. to form an electrode tab, and these electrode tabs are gathered to form a tab bundle.

[0050] In this case, electrode leads (L) are welded to the tab bundle so that the electrode assembly (C) can be connected to the outside, and a bead portion (B) is formed at the part where the tab bundle and electrode leads (L) are welded.

[0051] Next, the bead processing unit (200) is for processing a bead portion (B) formed by welding a tab bundle and an electrode lead (L), and is configured to include a foreign matter removal unit (210), a bead pressurizing unit (220), and a motor unit (230).

[0052] The foreign matter removal unit (210) is for removing foreign matter settled on the bead portion (B), and is equipped with a roller brush that is extended to a certain length, can rotate in a portion adjacent to the bead portion (B), and has a large number of hairs formed thereon.

[0053] The roller brush of the foreign substance removal unit (210) rotates in the direction in which the foreign substance is removed in the opposite direction to the direction in which the electrode assembly (C) is installed to prevent foreign substances from flowing in the direction of the electrode assembly (C) when removing foreign substances.

[0054] That is, based on Fig. 3, the roller brush of the foreign matter removal unit (210) rotates counterclockwise to remove foreign matter in the bead unit (B).

[0055] The bead pressurizing section (220) is intended to apply pressure to the bead section (B) and is connected to the foreign matter removal section (210) and is extended by a certain length.

[0056] Additionally, the bead pressurizing portion (220) may be connected and extended in a direction perpendicular to the foreign matter removal portion (210).

[0057] The bead pressurizing portion (220) may have a flat shape in the portion facing the bead portion (B), which is to pressurize the bead portion (B) more accurately.

[0058] Next, the motor unit (230) is for changing the positions of the foreign matter removal unit (210) and the bead pressurization unit (220), which are arranged to be perpendicular to each other.

[0059] More specifically, the motor unit (230) removes foreign substances from the bead unit (B) while the foreign substance removal unit (210) is positioned above the bead unit (B), and then rotates the foreign substance removal unit (210) and the bead pressurizing unit (220), which are formed as one piece, by 90° so that the bead pressurizing unit (220) is positioned above the bead unit (B).

[0060] Here, the bead processing unit (200) can be moved vertically to adjust the distance from the bead portion (B), and can also be moved horizontally to achieve vertical alignment with the bead portion (B) as needed.

[0061] Next, the pressure support member (300) is for supporting the bead part (B) from below when the bead part (B) is pressed by the bead pressure member (220) of the bead processing member (200), and the upper surface may be in the shape of a flat plate.

[0062] In addition, the pressure support member (300) can be moved to be positioned at the lower part of the bead section to accurately support the pressurized portion, and can thus be moved in the up, down, left, right, front, and back directions.

[0063] The air injection unit (400) is configured to spray air toward the bead unit (B) to remove foreign substances from the bead unit (B) and prevent foreign substances from flying toward the electrode assembly (C), and includes an upper air injection unit (410) and a lower air injection unit (420).

[0064] The upper air injection part (410) is located on the upper side of one side of the electrode assembly (C), and a first air flow path part (411) is formed inside through which air injected toward the bead part (B) moves.

[0065] The first air passage (411) may have an outlet through which air is sprayed in a slit shape, and the direction in which the air is sprayed may be bent at a certain angle so that the sprayed air can be directed toward the bead portion (B).

[0066] Accordingly, the first air flow path (411) may have a structure in which a portion is bent at a certain angle to bend the air in the direction of the bead portion (B).

[0067] Meanwhile, the lower air injection part (420) is located at the lower side of one side of the electrode assembly (C), and a second air flow path part (421) is formed inside through which air injected toward the bead part (B) moves.

[0068] The second air flow path (421) may have an outlet through which air is sprayed in a slit shape, and the direction in which the air is sprayed may be bent at a certain angle so that the sprayed air can be directed toward the bead portion (B).

[0069] Accordingly, the second air flow path (421) may have a structure in which a portion is bent at a certain angle to bend the air in the direction of the bead portion (B).

[0070] FIG. 4 is a perspective view showing an electrode assembly processing device according to a second preferred embodiment of the present invention, and FIG. 5 is a cross-sectional view showing an electrode assembly processing device according to a second preferred embodiment of the present invention.

[0071] Referring to FIGS. 4 and 5, the electrode assembly processing device according to the second embodiment of the present invention is identical to the electrode assembly processing device according to the first embodiment described in FIGS. 2 and 3 except for the foreign matter removal unit (210) of the bead processing unit (200), and therefore, the description of the same configuration will be omitted.

[0072] In the electrode assembly processing device according to the second embodiment, the foreign matter removal unit (210) of the bead processing unit (200) is an air injection device that is extended to a certain length and has an air flow path formed inside to allow air to flow, thereby being capable of injecting air.

[0073] That is, the foreign substance removal unit (210) according to the second embodiment removes foreign substances by spraying air, and has the advantage of being able to remove foreign substances without contacting the bead unit (B).

[0074] Fig. 6 is a perspective view showing an electrode assembly processing device according to a third preferred embodiment of the present invention, and Fig. 7 is a cross-sectional view showing an electrode assembly processing device according to a third preferred embodiment of the present invention.

[0075] Referring to FIGS. 6 and 7, the electrode assembly processing device according to the third preferred embodiment of the present invention is identical to the electrode assembly processing device according to the first embodiment described in FIGS. 2 and 3 except that an air intake unit (500) is additionally provided, and therefore, a description of the same configuration will be omitted.

[0076] In the electrode assembly processing device according to the third embodiment, an air intake unit (500) is provided at a position spaced apart from the bead processing unit (200).

[0077] The air intake section (500) removes foreign substances flying around the bead section (B) by sucking them up through the foreign substance removal section (210) and the air injection section (400), and has an air intake passage (510) formed on the inside.

[0078] In addition, the air intake portion (500) is formed in a shape in which the intake port for intake of air is bent at a certain angle so that it faces the bead portion (B).

[0079] Accordingly, a portion of the lower side of the air intake (510) is bent at a certain angle toward the bead portion (B).

[0080] In addition, the lower part of the air intake (510) is formed in a shape that becomes narrower inward from the intake port, which has the advantage of making it easier to suction and remove foreign substances.

[0081] This air intake unit (500) has the advantage of being able to prevent foreign substances from settling again on a workbench, etc., by removing foreign substances from the bead portion (B) and the vicinity of the bead portion (B).

[0082] The electrode assembly processing method using the electrode assembly processing device according to the present invention includes a first step of mounting an electrode assembly with electrode leads connected to a mounting jig, a second step of spraying air toward a bead portion through an air spray portion, a third step of removing foreign substances from the bead portion and applying pressure through a bead processing portion, and a fourth step of transporting the processed electrode assembly.

[0083] First, the first step of mounting the electrode assembly with the electrode leads connected to the mounting jig is to mount the electrode assembly with the electrode leads connected to the mounting jig so that a portion of the electrode assembly protrudes.

[0084] Here, the air injection part is located at the upper and lower portions of the portion where the electrode assembly protrudes from the mounting jig.

[0085] The second step of spraying air toward the bead portion through the air spray unit is a step in which the upper air spray unit and the lower air spray unit located at the upper and lower sides of the electrode assembly, respectively, spray air toward the bead portion.

[0086] At this time, foreign substances in and near the bead portion can be removed by the air injection portion, and foreign substances can be prevented from flying in the direction of the electrode assembly.

[0087] The third step of removing foreign substances from the bead portion and applying pressure through the bead processing section is the step of removing foreign substances from the bead portion and the vicinity of the bead portion through the foreign substance removal section of the bead processing section and then applying pressure to the bead portion through the bead pressurization section of the bead processing section.

[0088] At this time, the foreign substance is removed by the foreign substance removal unit, and the foreign substance removal unit and the bead pressurizing unit are rotated 90° by the driving of the motor unit so that the bead pressurizing unit is positioned above the bead unit and pressurizes the bead unit.

[0089] Additionally, foreign substances that may be generated while pressurizing the bead section by the air injection section operated in the second stage are removed by flying in the opposite direction to the direction in which the electrode assembly is located.

[0090] The fourth step of transporting the processed electrode assembly is a step of transporting the electrode assembly, whose bead portion has been processed by the bead processing unit, into a cell case, etc., for the next step of manufacturing a battery cell.

[0091] At this time, the electrode assembly transport may be carried out by a robot arm, a gripper, or a conveyor belt, and is not particularly limited as long as the electrode assembly can be transported to the next step in which the battery cell is manufactured.

[0092] Anyone with ordinary skill in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

[0093] (Explanation of symbols)

[0094] 100: Settling jig

[0095] 200: Bead processing section

[0096] 210: Foreign body removal unit

[0097] 220: Bead pressurization section

[0098] 230: Motor section

[0099] 300: Pressurized support

[0100] 400: Air injection unit

[0101] 410: Upper air injection unit

[0102] 411: First air passage

[0103] 420: Lower air injection unit

[0104] 421: Second air passage

[0105] 500: Air intake

[0106] 510: Air intake

[0107] L: Electrode lead

[0108] C: Electrode assembly

[0109] B: Bead part

Claims

1. A mounting jig on which an electrode assembly with electrode leads connected is mounted; A bead processing unit positioned on the upper side of the bead portion formed on the electrode lead and processing the bead portion; A pressure support portion located on the lower side of the above bead portion; and An electrode assembly processing device including an air injection unit positioned at the upper and lower portions of the electrode assembly and spraying air toward the bead processing unit.

2. In paragraph 1, An electrode assembly processing device comprising: a foreign matter removal unit formed by extending a certain length to remove foreign matters near the bead portion; a bead pressing unit provided to extend in a vertical direction connected to the foreign matter removal unit and pressurizing the bead portion; and a motor unit capable of changing positions by rotating the foreign matter removal unit and the bead pressing unit.

3. In paragraph 2, The above foreign matter removal unit is an electrode assembly processing device that is a roller brush that can rotate and has a large number of hairs formed thereon.

4. In paragraph 2, The above foreign matter removal unit is an electrode assembly processing device that is an air injection device that injects air.

5. In paragraph 2, An electrode assembly processing device including an air suction unit positioned apart from the above bead processing unit and sucking in air.

6. In paragraph 2, An electrode assembly processing device in which the electrode assembly is mounted on the mounting jig so that one side portion protrudes.

7. In paragraph 2, The above air injection unit includes an upper air injection unit located on an upper side of the electrode assembly and a lower air injection unit located on a lower side of the electrode assembly. The upper air injection part has a first air flow path formed therein through which air moves, The above lower air injection unit is an electrode assembly processing device having a second air flow path formed therein through which air moves.

8. In paragraph 7, An electrode assembly processing device in which the first air passage part and the second air passage part have a slit-shaped outlet for spraying air.

9. In paragraph 7, An electrode assembly processing device in which the first air passage portion and the second air passage portion are bent at a certain angle so that the direction in which air is sprayed can be sprayed toward the bead portion.

10. In paragraph 5, The above air intake section has an air intake passage formed to intake air, The above air intake path is an electrode assembly processing device in which the intake port for sucking air is bent at a certain angle so that it faces the bead portion.

11. In paragraph 10, An electrode assembly processing device in which the lower part of the above air intake passage has a shape in which the width becomes narrower as it goes inward from the above intake port.

12. A method for processing an electrode assembly using an electrode assembly processing device described in any one of clauses 1 to 11, The first step is to place the electrode assembly with the electrode leads connected on the placement jig; The second step is to spray air toward the bead section through the air spray section; The third step is to remove foreign substances from the bead part through the bead processing section and apply pressure; and A method for processing an electrode assembly, comprising: a fourth step of transporting the processed electrode assembly.

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