Electrode assembly manufacturing apparatus and manufacturing method using the same

Abstract

An electrode assembly manufacturing apparatus according to an embodiment of the present invention includes a first electrode-separator assembly supply unit that supplies a first electrode-separator assembly, a second electrode supply unit that supplies a second electrode sheet to be laminated so as to be positioned on an outer surface of the separator of the first electrode-separator assembly, a stack unit on which an electrode assembly formed by laminating the first electrode-separator assembly and the second electrode sheet is placed, and a holding unit that holds the second electrode sheet from the second electrode supply unit and moves the second electrode sheet.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims the benefit of priority based on Korean Patent Application No. 10 - 2022 - 0112122 filed on September 5, 2022 and Korean Patent Application No. 10 - 2023 - 0109585 filed on August 22, 2023, and all the contents disclosed in the documents of the Korean patent applications are incorporated herein by reference in their entirety.

[0002] The present invention relates to an electrode assembly manufacturing apparatus and a manufacturing method using the same, and more particularly, to an electrode assembly manufacturing apparatus with improved productivity and a manufacturing method using the same.

Background Art

[0003] In modern society, as the use of portable devices such as mobile phones, laptop computers, video cameras, and digital cameras has become common, technological development in fields related to such mobile devices has become active. In addition, rechargeable secondary batteries are a solution for solving problems such as air pollution in existing gasoline vehicles that use fossil fuels, and are used as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), plug - in hybrid electric vehicles (P - HEVs), etc., so the need for development of secondary batteries is increasing.

[0004] Currently commercialized secondary batteries include nickel - cadmium batteries, nickel - metal hydride batteries, nickel - zinc batteries, lithium secondary batteries, etc. Among these, lithium secondary batteries have the advantages of free charge and discharge, low self - discharge rate, and high energy density, and are the most widely noticed.

[0005] Secondary batteries are classified into cylindrical batteries and prismatic batteries in which the electrode assembly is built into a cylindrical or prismatic metal can according to the shape of the battery case, and pouch - type batteries in which the electrode assembly is built into a pouch - type case of an aluminum laminate sheet.

[0006] In addition, secondary batteries can also be classified according to the structure of the electrode assembly in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are laminated. Typically, there are a jelly roll type (winding type) electrode assembly having a structure in which a long sheet-like positive electrode and negative electrode are wound with a separator interposed therebetween, and a stack type (lamination type) electrode assembly in which a plurality of positive electrodes and negative electrodes cut out in units of a predetermined size are sequentially laminated with a separator interposed therebetween. Recently, in order to solve the problems of the jelly roll type electrode assembly and the stack type electrode assembly, a stack / folding type electrode assembly, which is a hybrid form of the jelly roll type and the stack type, has also been developed.

[0007] On the other hand, in manufacturing a stack type or stack / folding type electrode assembly, conventionally, a plurality of bicells formed by sequentially laminating a negative electrode, a separator, and a positive electrode are manufactured, and these are laminated, or after attaching these to a sheet-like separator, the sheet-like separator is folded in one direction. However, in such a conventional structure, since the bicells are manufactured in advance and then attached to the sheet-like separator again and laminated, the manufacturing procedure is complicated, and since the sheet-like separators are arranged in several layers on the side surface of the final battery cell, there is a problem that an unnecessary gap space is generated between the electrode and the separator.

[0008] In addition to such a lamination method, conventionally, a method of manufacturing an electrode assembly using a zigzag lamination method has also been used. The zigzag lamination method is a method of laminating an electrode assembly in which a positive electrode and a negative electrode are alternately inserted while a separator unwound from a wound roll moves from one side to the other side and from the other side to one side. However, in the case of the conventional zigzag lamination method, there is a problem that the cut electrodes must be stored separately, and there is a risk that the electrodes inserted during the progress of the lamination process may move. In addition, when producing a long battery cell, it is difficult to control the tension of the separator, the progress speed is slow, the manufacturing efficiency is reduced, and of course, there is a limit to improving productivity.

[0009] Therefore, there is a current need for a new electrode assembly manufacturing apparatus and method that can improve the manufacturing efficiency and productivity of the above-described stacked or stack / folding type electrode assemblies and also improve the durability and stability of the products.

Summary of the Invention

Problems to be Solved by the Invention

[0010] The problem to be solved by the present invention is to provide an electrode assembly manufacturing apparatus and a manufacturing method using the same that can improve the manufacturing efficiency, product quality, and productivity compared to the conventional electrode assembly manufacturing process.

[0011] The problem to be solved by the present invention is not limited to the above-described problems, and problems not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present invention pertains from the present specification and the attached drawings.

Means for Solving the Problems

[0012] An electrode assembly manufacturing apparatus according to an embodiment of the present invention includes a first electrode-separator assembly supply unit that supplies a first electrode-separator assembly including a plurality of first electrode sheets positioned between sheet-like separators facing each other, a second electrode supply unit that supplies a second electrode sheet to be laminated so as to be positioned on an outer surface of the sheet-like separator of the first electrode-separator assembly, a stack unit on which an electrode assembly formed by laminating the first electrode-separator assembly and the second electrode sheet is placed, and a holding unit that holds the second electrode sheet from the second electrode supply unit and moves the second electrode sheet.

[0013] The second electrode supply unit includes a second-1 electrode supply unit and a second-2 electrode supply unit, and the stack unit is disposed between the second-1 electrode supply unit and the second-2 electrode supply unit.

[0014] The stack unit can move between the second-1 electrode supply unit and the second-2 electrode supply unit.

[0015] The stack unit can move on a straight line that forms the shortest distance between the second-1 electrode supply unit and the second-2 electrode supply unit.

[0016] The holding unit can move between the second electrode supply unit and the stack unit.

[0017] The holding unit holds the second electrode sheet from the second electrode supply unit adjacent to the holding unit, moves the held second electrode sheet to the stack unit, and the stack unit that has received the held second electrode sheet can move to laminate the first electrode-separator assembly on the stack unit.

[0018] The stack unit moves to be adjacent to the second electrode supply unit that is farther from the stack unit among the plurality of second electrode supply units in order to laminate the first electrode-separator assembly. By moving the stack unit to be adjacent to the second electrode supply unit, the first electrode-separator assembly can be positioned on the uppermost second electrode sheet of the stack unit.

[0019] The first electrode-separator assembly may be in a state where the first electrode sheet is laminated between the sheet-like separators.

[0020] The first electrode may be a negative electrode, and the second electrode may be a positive electrode.

[0021] According to another embodiment of the present invention, a method for manufacturing an electrode assembly includes a process of forming a first electrode-separator assembly including two sheet-like separators and a plurality of first electrode pieces continuously positioned between inner surfaces of the sheet-like separators facing each other, a process of disposing the first electrode-separator assembly in a stack unit, a process of laminating a second electrode piece on an outer surface of the sheet-like separator of the first electrode-separator assembly disposed in the stack unit, and a process of moving the stack unit and laminating the first electrode-separator assembly on the laminated second electrode piece.

[0022] The process of laminating the second electrode piece on the outer surface of the sheet-like separator of the first electrode-separator assembly disposed in the stack unit may be such that a holding unit holds the second electrode piece from a second electrode supply unit, and the held second electrode piece is laminated on the first electrode-separator assembly disposed in the stack unit.

[0023] The stack unit can be positioned between a second-1 electrode supply unit and a second-2 electrode supply unit.

[0024] The process of moving the stack unit and laminating the first electrode-separator assembly on the laminated second electrode piece may be such that the stack unit moves between the second-1 electrode supply unit and the second-2 electrode supply unit, and the first electrode-separator assembly is laminated on the uppermost second electrode piece of the stack unit.

Advantages of the Invention

[0025] According to the embodiment, the electrode assembly manufacturing apparatus and the manufacturing method using the same according to the present invention can form a negative electrode-separator assembly in advance and alternately laminate the negative electrode-separator assembly and the positive electrode piece, thereby further improving productivity.

[0026] The effects of the present invention are not necessarily limited to the effects described above, and the effects not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present invention pertains from this specification and the attached drawings.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Modes for Carrying Out the Invention

[0028] Hereinafter, with reference to the attached drawings, various embodiments of the present invention will be described in detail so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement them. The present invention can be realized in various different forms and is not limited to the embodiments described here.

[0029] In order to clearly explain the present invention, parts that are unnecessary for the explanation are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0030] In addition, the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings. The thicknesses are shown enlarged in the drawings in order to clearly represent various layers and regions. Also, in the drawings, for convenience of explanation, the thicknesses of some layers and regions are exaggeratedly shown.

[0031] In addition, throughout the specification, when a certain part "includes" a certain component, this means that other components can be further included, rather than excluding other components, unless otherwise stated to the contrary.

[0032] Furthermore, throughout the specification, when referring to "on a plane", this means when looking at the target part from above, and when referring to "in a cross-section", this means when looking at the cross-section obtained by vertically cutting the target part from the side.

[0033] Hereinafter, an electrode assembly manufacturing apparatus according to an embodiment of the present invention will be described.

[0034] FIGS. 1 and 2 are side views of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.

[0035] Referring to FIGS. 1 and 2, an electrode assembly manufacturing apparatus 1 according to this embodiment includes, as shown in FIG. 4, a negative electrode-separator assembly supply unit 10 that supplies a negative electrode-separator assembly 150 including two sheet-like separators 130 and a plurality of negative electrode plates 120 continuously positioned between the inner surfaces of the separators 130 facing each other; a positive electrode supply unit 20 that supplies a positive electrode plate 110 to be laminated so as to be positioned on the outer surface of the separator 130 of the negative electrode-separator assembly 150 supplied from the negative electrode-separator assembly supply unit 10; a stack unit 30 on which an electrode assembly 100 formed by laminating the negative electrode-separator assembly 150 and the positive electrode plate 110 is placed; and a holding unit 40 that holds the positive electrode plate 110 from the positive electrode supply unit 20 and moves the positive electrode plate 110 toward the stack unit 30.

[0036] A plurality of positive electrode supply units 20 are formed. As an example, the positive electrode supply unit 20 can include a first positive electrode supply unit 21 and a second positive electrode supply unit 22. Therefore, by supplying the positive electrode plate 110 from the plurality of formed positive electrode supply units 20, the productivity of the electrode assembly 100 of the electrode assembly manufacturing apparatus 1 according to the present embodiment can be improved.

[0037] At this time, the stacking unit 30 is formed between the adjacent positive electrode supply units 20 among the plurality of positive electrode supply units 20. As an example, the stacking unit 30 is formed between the first positive electrode supply unit 21 and the second positive electrode supply unit 22, and may move and / or reciprocate between the first positive electrode supply unit 21 and the second positive electrode supply unit 22. Specifically, the stacking unit 30 can move and / or reciprocate on a straight line forming the shortest distance between the first positive electrode supply unit 21 and the second positive electrode supply unit 22.

[0038] The holding unit 40 can move between the positive electrode supply unit 20 and the stacking unit 30. Specifically, the holding unit 40 may hold the positive electrode plate 110 from the positive electrode supply unit 20 adjacent to the holding unit 40, move the held positive electrode plate 110 to the stacking unit 30, and laminate it on the electrode assembly 100 on the stacking unit 30. At this time, at the moment when the positive electrode plate 110 is laminated on the electrode assembly 100 of the stacking unit 30 by the holding unit 40, the negative electrode-separator assembly 150 may be arranged on the uppermost part of the electrode assembly 100 of the stacking unit 30. Therefore, it is laminated so that the positive electrode plate 110 is located on the outer surface of the separator 130 of the negative electrode-separator assembly 140.

[0039] The stacking unit 30 may laminate the negative electrode-separator assembly 150 on the stacking unit 30 or on the positive electrode plate 110 while moving between the first positive electrode supply unit 21 and the second positive electrode supply unit 22.

[0040] That is, as described above, while moving between the first positive electrode supply unit 21 and the second positive electrode supply unit 22, the stack unit 30 can receive the positive electrode plate 110 from the holding unit 40. At this time, the stack unit 30 that has received the held positive electrode plate 110 can move to laminate the negative electrode-separator assembly 150 on the positive electrode plate 110.

[0041] More specifically, the stack unit 30 can move so as to be adjacent to the positive electrode supply unit 20 of the positive electrode supply unit 20 that is located farther from the stack unit 30 in order to laminate the negative electrode-separator assembly 150. Further, by moving the stack unit 30 so as to be adjacent to the positive electrode supply unit 20, it is possible to position the negative electrode-separator assembly 150 on the uppermost positive electrode plate 110 of the stack unit 30.

[0042] As an example, referring to FIG. 2, the stack unit 30 is located closer to the first positive electrode supply unit 21, and the positive electrode plate 110 is supplied from the first positive electrode supply unit 21. Thereafter, the stack unit 30 can move so as to be adjacent to the second positive electrode supply unit 22, which is located farther from the stack unit 30, among the positive electrode supply units 20 in order to laminate the negative electrode-separator assembly 150. That is, it can move to the same position as the stack unit 30 in FIG. 1. Further, by moving the stack unit 30 so as to be adjacent to the second positive electrode supply unit 22, it is possible to position the negative electrode-separator assembly 150 on the uppermost positive electrode plate 110 of the stack unit 30.

[0043] Therefore, the electrode assembly manufacturing apparatus 1 according to the present embodiment can improve productivity more than a conventional electrode assembly manufacturing apparatus by supplying the negative electrode-separator assembly 150, forming a plurality of positive electrode supply units 20, and laminating the positive electrode plates 110 on the negative electrode-separator assembly 150 while the stack unit 30 moves between the plurality of positive electrode supply units 20.

[0044] Hereinafter, the negative electrode-separator assembly supplied to the electrode assembly manufacturing apparatus according to the present embodiment and the electrode assembly manufactured by the electrode assembly manufacturing apparatus according to the present embodiment will be described.

[0045] FIG. 3 is a diagram showing a manufacturing method of a negative electrode-separator assembly input into an electrode assembly manufacturing apparatus according to an embodiment of the present invention. FIG. 4 is a side view showing the negative electrode-separator assembly manufactured by the manufacturing method of FIG. 3. FIG. 5 is a side view showing the electrode assembly produced by the electrode assembly manufacturing apparatus according to an embodiment of the present invention, showing the electrode assembly of part A in FIG. 2.

[0046] The negative electrode-separator assembly 150 input into the electrode assembly manufacturing apparatus 1 according to an embodiment of the present invention is formed by laminating a long sheet-shaped separator 130 and a negative electrode plate 120.

[0047] At this time, referring to FIG. 3, in the process of forming the negative electrode-separator assembly 150, after a long sheet-shaped negative electrode sheet 121 is input into the negative electrode-separator assembly manufacturing apparatus, the negative electrode sheet 121 may be cut to form the negative electrode plate 120, but it is not limited thereto, and the negative electrode plate 120 itself may be input.

[0048] On the other hand, the separator 130 is provided as two long sheet-shaped separators 130.

[0049] Therefore, as shown in FIG. 4, the negative electrode-separator assembly 150 is formed in a state where a plurality of negative electrode plates 120 are interposed between the inner surfaces of the two separators 130 facing each other. At this time, the plurality of negative electrode plates 120 interposed between the separators 130 are arranged at intervals in the longitudinal direction of the separator 130 (the horizontal direction in FIG. 4).

[0050] At the same time, for the formation of the negative electrode-separator assembly 150, a final negative electrode-separator assembly 150 is formed by additionally forming a heating and laminating process. Therefore, the separator 130 and the negative electrode plate 120 may be joined to each other, enabling the formation of a stronger negative electrode-separator assembly 150 and electrode assembly 100.

[0051] In addition, the electrode assembly 100 manufactured by supplying the above-described negative electrode-separator assembly 150 to the electrode assembly manufacturing apparatus 1 is manufactured in a form in which the negative electrode-separator assembly 150 and the positive electrode plate 110 are folded and laminated by a zigzag lamination method.

[0052] Specifically, referring to FIG. 5, the electrode assembly 100 is manufactured by folding the connecting portions formed on the separator 130 in opposite directions. Here, the connecting portion may be a portion where only the separator 130 exists without the positive electrode plate 110 or the negative electrode plate 120 being disposed in the electrode assembly 100.

[0053] In particular, referring to FIGS. 1 and 2, the stack unit 30 of the electrode assembly manufacturing apparatus 1 according to the present embodiment laminates the negative electrode-separator assembly 150 while moving between the first positive electrode supply unit 21 and the second positive electrode supply unit 22. At this time, the direction of movement from the position adjacent to the first positive electrode supply unit 21 to the position adjacent to the second positive electrode supply unit 22 and the direction of movement from the position adjacent to the second positive electrode supply unit 22 to the position adjacent to the first positive electrode supply unit 21 are opposite to each other, and the connecting portions formed on the separator 130 of the electrode assembly 100 are folded in opposite directions.

[0054] According to the embodiment described above, although it has been described that a negative electrode-separator assembly in which a negative electrode plate is laminated to a separator is alternately laminated with a positive electrode plate, an embodiment in which a positive electrode-separator assembly in which a positive electrode plate is laminated to a separator is alternately laminated with a negative electrode plate is also possible.

[0055] However, in the case of an electrode assembly designed such that the negative electrode is larger in size than the positive electrode during the production process, when considering the process margin, it can be said that an embodiment in which a negative electrode-separator assembly in which the negative electrode sheet is laminated on the separator is supplied is more preferable.

[0056] Hereinafter, an electrode assembly manufacturing apparatus according to a comparative example will be described.

[0057] FIG. 6 is a side view of an electrode assembly manufacturing apparatus according to a comparative example. FIG. 7 is a side view showing an electrode assembly manufactured by the electrode assembly manufacturing apparatus according to the comparative example.

[0058] Referring to FIGS. 6 and 7, the electrode assembly manufacturing apparatus 200 according to the comparative example can include all of a positive electrode supply unit and a negative electrode supply unit into which a separator sheet 230 is inserted and positive electrode sheets 210 and negative electrode sheets 220 are supplied.

[0059] Therefore, the stack unit 260 can move between the positive electrode supply unit and the negative electrode supply unit, receive the positive electrode sheet 210 and the negative electrode sheet 220 from the holding unit 270, and form an electrode assembly 250.

[0060] Further, the electrode assembly 250 manufactured by the electrode assembly manufacturing apparatus 200 according to the comparative example can have a structure of an electrode assembly 250 in which a positive electrode sheet 210 or a negative electrode sheet 220 is arranged around a single separator sheet 230, and does not have a form in which a negative electrode sheet 120 is positioned between two separator membranes 130 by including a single sheet of separator 230.

[0061] At this time, in the conventional electrode assembly manufacturing apparatus 200, since the positive electrode sheet 210 and the negative electrode sheet 220 have to be laminated on the separator 230 respectively, there is a limit to the improvement of the production speed.

[0062] On the other hand, the electrode assembly manufacturing apparatus 1 according to an embodiment of the present invention can ensure productivity that is twice as high as that of the conventional electrode assembly manufacturing apparatus 200 by laminating the positive electrode sheet 110 after loading the negative electrode-separator assembly 150.

[0063] Hereinafter, a method for manufacturing an electrode assembly according to another embodiment of the present invention will be described.

[0064] The method for manufacturing an electrode assembly according to this embodiment includes a process of forming a negative electrode-separator assembly 150 including two sheet-like separators 130 and a plurality of negative electrode sheets 120 continuously positioned between the inner surfaces of the separators 130 facing each other, a process of arranging the negative electrode-separator assembly 150 in the stack unit 30, a process of laminating the positive electrode sheet 110 on the outer surface of the separator 130 of the negative electrode-separator assembly 150 arranged in the stack unit 30, and a process of the stack unit 30 moving and laminating the negative electrode-separator assembly 150 on the laminated positive electrode sheet 110.

[0065] At this time, the process of laminating the positive electrode sheet 110 on the outer surface of the separator 130 of the negative electrode-separator assembly 150 arranged in the stack unit 30 may be such that the holding unit 40 holds the positive electrode sheet 110 from the positive electrode supply unit 20 and the held positive electrode sheet 110 is laminated on the negative electrode-separator assembly 150 arranged in the stack unit 30.

[0066] More specifically, as described above, the stack unit 30 is positioned between the first positive electrode supply unit 21 and the second positive electrode supply unit 22 and can move and reciprocate between them. Therefore, the process in which the stack unit 30 moves and the negative electrode-separator assembly 150 is laminated on the laminated positive electrode sheet 110 is that the stack unit 30 moves between the first positive electrode supply unit 21 and the second positive electrode supply unit 22, and the negative electrode-separator assembly 150 is laminated on the uppermost positive electrode sheet 110 of the stack unit 30.

[0067] Accordingly, the method for manufacturing an electrode assembly according to this embodiment can provide a method for manufacturing an electrode assembly with improved productivity by forming a negative electrode-separator assembly 150 and receiving and laminating positive electrode sheets 110 from a plurality of positive electrode supply units 20.

[0068] As described above, the preferred embodiments of the present invention have been described in detail. However, the scope of the rights of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also belong to the scope of the rights of the present invention.

Explanation of Reference Numerals

[0069] 1: Electrode assembly manufacturing apparatus 10: Negative electrode-separator assembly supply unit 20: Positive electrode supply unit 21: First positive electrode supply unit 22: Second positive electrode supply unit 30: Stacking unit 40: Holding unit 100: Electrode assembly 110: Positive electrode sheet 120: Negative electrode sheet 130: Separator 150: Negative electrode-separator assembly

Claims

1. A first electrode-separation membrane assembly supply unit that supplies a first electrode-separation membrane assembly including a plurality of first electrode sheets positioned between sheet-like separation membranes facing each other, A second electrode supply unit that supplies a second electrode sheet laminated so as to be positioned on the outer surface of the sheet-like separation membrane of the first electrode-separation membrane assembly, A stack unit on which an electrode assembly formed by laminating the first electrode-separation membrane assembly and the second electrode sheet is placed, An electrode assembly manufacturing apparatus including a holding unit that holds the second electrode sheet from the second electrode supply unit and moves the second electrode sheet.

2. The second electrode supply unit includes a second-1 electrode supply unit and a second-2 electrode supply unit, The stack unit is disposed between the second-1 electrode supply unit and the second-2 electrode supply unit. The electrode assembly manufacturing apparatus according to claim 1.

3. The stack unit moves between the second-1 electrode supply unit and the second-2 electrode supply unit. The electrode assembly manufacturing apparatus according to claim 2.

4. The stack unit moves on a straight line forming the shortest distance between the second-1 electrode supply unit and the second-2 electrode supply unit. The electrode assembly manufacturing apparatus according to claim 3.

5. The holding unit moves between the second electrode supply unit and the stack unit. The electrode assembly manufacturing apparatus according to claim 1.

6. The holding unit holds the second electrode sheet from the second electrode supply unit adjacent to the holding unit, moves the held second electrode sheet to the stack unit, The stack unit that has received the held second electrode sheet moves to laminate the first electrode-separation membrane assembly on the stack unit. The electrode assembly manufacturing apparatus according to claim 1.

7. The stack unit moves to be adjacent to the second electrode supply unit that is farther from the stack unit among the plurality of second electrode supply units in order to laminate the first electrode-separation membrane assembly, The electrode assembly manufacturing apparatus according to claim 6, wherein the stack unit moves so as to be adjacent to the second electrode supply unit, and the first electrode-separator assembly is positioned on the uppermost second electrode sheet of the stack unit.

8. The electrode assembly manufacturing apparatus according to claim 1, wherein the first electrode-separator assembly is in a state in which the first electrode sheet is laminated between the sheet-like separators.

9. The electrode assembly manufacturing apparatus according to claim 1, wherein the first electrode is a negative electrode and the second electrode is a positive electrode.

10. A process of forming a first electrode-separator assembly including two sheet-like separators and a plurality of first electrode sheets continuously positioned between the inner surfaces of the sheet-like separators facing each other; A process of disposing the first electrode-separator assembly in a stack unit; A process of laminating a second electrode sheet on the outer surface of the sheet-like separator of the first electrode-separator assembly disposed in the stack unit; A method of manufacturing an electrode assembly including a process in which the stack unit moves and the first electrode-separator assembly is laminated on the laminated second electrode sheet.

11. The process of laminating a second electrode sheet on the outer surface of the sheet-like separator of the first electrode-separator assembly disposed in the stack unit is as follows: The holding unit holds the second electrode sheet from the second electrode supply unit, and the held second electrode sheet is laminated on the first electrode-separator assembly disposed in the stack unit. The method of manufacturing an electrode assembly according to claim 10.

12. The stack unit is positioned between a second-1 electrode supply unit and a second-2 electrode supply unit. The method of manufacturing an electrode assembly according to claim 10.

13. The process in which the stack unit moves and the first electrode-separator assembly is laminated on the laminated second electrode sheet is as follows: The stack unit moves between the second-1 electrode supply unit and the second-2 electrode supply unit, and the first electrode-separator assembly is laminated on the uppermost second electrode sheet of the stack unit. The method of manufacturing an electrode assembly according to claim 12.

14. In the process of disposing the first electrode-separator assembly in the stack unit, the first electrode-separator assembly is in a state where the first electrode sheet is laminated between the sheet-like separators. The method for manufacturing an electrode assembly according to claim 10.

15. The method for manufacturing an electrode assembly according to claim 10, wherein the first electrode is a negative electrode and the second electrode is a positive electrode.

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