Electrode assembly manufacturing apparatus and manufacturing method using the same

Abstract

An electrode assembly manufacturing apparatus according to one embodiment of the present invention comprises: a first electrode-membrane assembly supply unit for supplying a first electrode-membrane assembly; a second electrode supply unit for supplying a second electrode sheet, the second electrode sheet being stacked on an outer surface of a separator of the first electrode-separator assembly; a stacking unit on which an electrode assembly formed by stacking the first electrode-separator assembly and the second electrode sheet is loaded; 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

[0002] This application claims the benefit of 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, the disclosures of which are incorporated herein by reference in their entirety.

[0003] The present disclosure 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

[0004] In modern society, with the daily use of portable devices such as mobile phones, notebook computers, video cameras and digital cameras, the development of technology in the field related to the above mobile devices has also been promoted. In addition, rechargeable / dischargeable secondary batteries are used as power sources for electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (P-HEV), etc., in an attempt to solve the air pollution caused by the use of fossil fuels by existing gasoline vehicles. Therefore, the demand for the development of secondary batteries is growing.

[0005] Currently, commercial secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and lithium secondary batteries. Among them, lithium secondary batteries have become the focus due to their advantages such as free charge and discharge, extremely low self-discharge rate and high energy density.

[0006] Secondary batteries can be classified into cylindrical or prismatic batteries and pouch-type batteries based on the shape of the battery case. In the cylindrical or prismatic battery, the electrode assembly is built into a cylindrical or prismatic metal can, and in the pouch-type battery, the electrode assembly is built into a pouch-type case made of stacked aluminum plates.

[0007] In addition, secondary batteries can be classified based on the structure of the electrode assembly, which has a structure in which the positive electrode and the negative electrode are stacked with a separator. Typically, it can be mentioned: a roll (winding) type structure in which a long sheet type positive electrode and a long sheet type negative electrode are wound with a separator; a stack (laminated) type structure in which a plurality of positive electrodes and negative electrodes are cut into a predetermined unit size and stacked sequentially with a separator; and the like. In recent years, in order to solve the problems caused by the roll-type electrode assembly and the stacked electrode assembly, a stacked / folded electrode assembly has been developed, which is a combination of the roll-type electrode assembly and the stacked electrode assembly.

[0008] Meanwhile, in manufacturing stacked electrode assemblies and stacked / folded electrode assemblies, a method of preparing a plurality of bi-cells is conventionally used, wherein the plurality of bi-cells are formed by sequentially laminating a negative electrode, a separator, and a positive electrode, laminating or attaching them to a sheet-like separator, and then folding the sheet-like separator in one direction. However, such a conventional structure not only has a complicated manufacturing process because the bi-cells are prepared in advance and then attached to the sheet-like separator and laminated, but also has the problem of generating an unnecessary gap space between the electrode and the separator because the multi-layer sheet-like separator is disposed on the side surface of the final battery cell.

[0009] In addition, conventionally, in addition to this lamination method, a method for manufacturing an electrode assembly using a zigzag lamination method has been used. The zigzag lamination method is an electrode assembly lamination method in which the positive electrode and the negative electrode are alternately inserted in the process of moving the separator unrolled from the winding roll 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 inserted electrodes may move during the lamination process. In addition, when producing long battery cells, it is difficult to control the tension of the separator and the process speed is slow, which not only reduces the manufacturing efficiency, but also has limitations in improving productivity.

[0010] Therefore, it is necessary to develop a new electrode assembly manufacturing apparatus and method that can improve the manufacturing efficiency and productivity of the above-mentioned stacked or stacked / folded electrode assemblies and improve product durability and stability. Summary of the invention

[0011] Technical issues

[0012] The purpose of the present disclosure is to provide an electrode assembly manufacturing device and a manufacturing method using the same, which can improve manufacturing efficiency, product quality and productivity compared with traditional electrode assembly manufacturing processes.

[0013] The objects of the present disclosure are not limited to the aforementioned objects, and any other objects and advantages not mentioned herein should be clearly understood by those skilled in the art from the following description and the accompanying drawings.

[0014] Technical Solution

[0015] According to one embodiment of the present disclosure, an electrode assembly manufacturing device is provided, including: a first electrode-diaphragm assembly supply unit, the first electrode-diaphragm assembly supply unit supplies a first electrode-diaphragm assembly, the first electrode-diaphragm assembly including: a plurality of first electrode sheets, the plurality of first electrode sheets being located between sheet-like diaphragms facing each other; a second electrode supply unit, the second electrode supply unit supplies second electrode sheets, the second electrode sheets being laminated to be located on the outer side surface of the diaphragm of the first electrode-diaphragm assembly; a stacking unit, an electrode assembly formed by laminating the first electrode-diaphragm assembly and the second electrode sheets being placed on the stacking unit; and a holding unit, the holding unit holding the second electrode sheet from the second electrode supply unit and moving the second electrode sheet.

[0016] The second electrode supply unit includes a 2-1st electrode supply unit and a 2-2nd electrode supply unit, and the stacking unit may be disposed between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

[0017] The stacking unit may be movable between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

[0018] The stacking unit may move on a straight line forming a shortest distance between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

[0019] The holding unit may be movable between the second electrode supply unit and the stacking unit.

[0020] The holding unit holds the second electrode sheet from the second electrode supply unit adjacent to the holding unit and moves the held second electrode sheet to the stacking unit, and the stacking unit having received the transfer of the held second electrode sheet can move so as to laminate the first electrode-diaphragm assembly on the stacking unit.

[0021] The stacking unit is moved to be adjacent to a second electrode supply unit far away from the stacking unit among a plurality of second electrode supply units so as to laminate the first electrode-diaphragm assembly, and the stacking unit can be moved to be adjacent to the second electrode supply unit so as to position the first electrode-diaphragm assembly on the uppermost second electrode sheet of the stacking unit.

[0022] The first electrode-separator assembly is in a state where the first electrode sheet is laminated between the sheet-like separators.

[0023] The first electrode may be a cathode, and the second electrode may be a cathode.

[0024] According to another embodiment of the present disclosure, a method for manufacturing an electrode assembly is provided, comprising the following steps: forming a first electrode-diaphragm assembly, the first electrode-diaphragm assembly comprising two sheet-like diaphragms and a plurality of first electrode sheets continuously located between inner surfaces of the sheet-like diaphragms facing each other; arranging the first electrode-diaphragm assembly in a stacking unit; laminating a second electrode sheet on the outer surface of the diaphragm of the first electrode-diaphragm assembly arranged in the stacking unit; and moving the stacking unit and laminating the first electrode-diaphragm assembly on the laminated second electrode sheet.

[0025] The step of laminating the second electrode sheet on the outer side surface of the diaphragm of the first electrode-diaphragm assembly arranged in the stacking unit may be the following steps: a holding unit holds the second electrode sheet from the second electrode supply unit and laminates the held second electrode sheet on the first electrode-diaphragm assembly arranged in the stacking unit.

[0026] The stacking unit may be located between the 2-1st electrode supplying unit and the 2-2nd electrode supplying unit.

[0027] The step of moving the stacking unit and laminating the first electrode-diaphragm assembly on the laminated second electrode sheet may be the following steps: moving the stacking unit between the 2-1 electrode supply unit and the 2-2 electrode supply unit, and laminating the first electrode-diaphragm assembly on the topmost second electrode sheet of the stacking unit.

[0028] Beneficial Effects

[0029] According to an embodiment, the electrode assembly manufacturing apparatus of the present disclosure and the manufacturing method using the same pre-form a negative electrode-separator assembly and alternately laminate the negative electrode-separator assembly and positive electrode sheets, thereby improving productivity.

[0030] Effects obtainable from the present disclosure may not be limited to the above-mentioned effects. Also, other effects not mentioned may be clearly understood by a person skilled in the art in the art to which the present disclosure belongs based on the following description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 and Figure 2 is a side view of an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure.

[0032] Figure 3 is a diagram illustrating a method of manufacturing a negative electrode-separator assembly inserted into an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure.

[0033] Figure 4 It is shown by Figure 3Side view of a negative electrode-diaphragm assembly manufactured by the manufacturing method.

[0034] Figure 5 It is shown Figure 2 1 is a side view of an electrode assembly of section A, where section A is an electrode assembly manufactured by an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure.

[0035] Figure 6 is a side view of an electrode assembly manufacturing apparatus according to a comparative example.

[0036] Figure 7 is a side view showing an electrode assembly manufactured by an electrode assembly manufacturing apparatus according to a comparative example. DETAILED DESCRIPTION

[0037] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0038] In order to clearly describe the present disclosure, parts irrelevant to the description will be omitted, and the same reference numerals will be used throughout the description to denote the same or similar elements.

[0039] In addition, in the drawings, for the convenience of description, the size and thickness of each element are arbitrarily shown, and the present disclosure is not necessarily limited to those shown in the drawings. In the drawings, for the sake of clarity, the thickness of layers, regions, etc. are exaggerated. In the drawings, for the convenience of description, the thickness of components and regions is exaggerated.

[0040] Furthermore, throughout the specification, when a part is referred to as “including” or “comprising” a certain component, it means that the part may further include other components, without excluding the other components, unless otherwise specified.

[0041] Furthermore, throughout the specification, when referred to as a “plane”, this means when the target portion is viewed from the upper side, and when referred to as a “cross section”, this means when the target portion is viewed from one side of a cross section cut vertically.

[0042] Now, an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure will be described.

[0043] Figure 1 and Figure 2 is a side view of an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure.

[0044] Reference Figure 1 and Figure 2According to the present embodiment, the electrode assembly manufacturing apparatus 1 may include: a negative electrode-separator assembly supply unit 10, which supplies a negative electrode-separator assembly 150, and the negative electrode-separator assembly 150 includes: Figure 4 Two sheet-like separators 130 are shown, and a plurality of negative electrode sheets 120 are located between the sheet-like separators 130 facing each other; a positive electrode supply unit 20, which supplies positive electrode sheets 110, which are laminated to be located on the outer surface of the separator 130 of the negative electrode-separator assembly 150 supplied by the negative electrode-separator assembly supply unit 10; a stacking unit 30, on which the electrode assembly 100 formed by laminating the negative electrode-separator assembly 150 and the positive electrode sheet 110 is placed; and a holding unit 40, which holds the positive electrode sheet 110 from the positive electrode supply unit 20 and moves the positive electrode sheet 110 toward the stacking unit 30.

[0045] The positive electrode supply unit 20 may be formed in plurality, and as an example, the positive electrode supply unit 20 may include a first positive electrode supply unit 21 and a second positive electrode supply unit 22. Therefore, the positive electrode sheet 110 is supplied from the positive electrode supply unit 20 formed in plurality, thereby being able to improve the productivity of the electrode assembly 100 of the electrode assembly manufacturing apparatus 1 according to the present embodiment.

[0046] At this time, the stacking unit 30 may be formed between the positive electrode supply units 20 adjacent to each other 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 may 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.

[0047] The holding unit 40 may be moved between the positive electrode supply unit 20 and the stacking unit 30. Specifically, the holding unit 40 holds the positive electrode sheet 110 from the positive electrode supply unit 20 adjacent thereto, and moves the held positive electrode sheet 110 to the stacking unit 30, and may be laminated on the electrode assembly 100 on the stacking unit 30. At this time, when the positive electrode sheet 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 disposed at the uppermost portion of the electrode assembly 100 of the stacking unit 30. Therefore, the positive electrode sheet 110 may be laminated to be located on the outer side surface of the separator 130 of the negative electrode-separator assembly 140.

[0048] When moving between the first positive electrode supply unit 21 and the second positive electrode supply unit 22 , the stacking unit 30 may laminate the negative electrode-separator assembly 150 on the stacking unit 30 or on the positive electrode sheet 110 .

[0049] That is, as described above, the stacking unit 30 may receive the transfer of the positive electrode sheet 110 from the holding unit 40 while moving between the first positive electrode supply unit 21 and the second positive electrode supply unit 22. At this time, the stacking unit 30 having received the transfer of the held positive electrode sheet 110 may move so as to laminate the negative electrode-separator assembly 150 on the positive electrode sheet 110.

[0050] More specifically, the stacking unit 30 may be moved to be adjacent to the positive electrode supply unit 20 that is farther away from the stacking unit 30 among the positive electrode supply units 20 so as to laminate the negative electrode-separator assembly 150. In addition, the stacking unit 30 is moved to be adjacent to the positive electrode supply unit 20, thereby enabling the negative electrode-separator assembly 150 to be positioned on the uppermost positive electrode sheet 110 of the stacking unit 30.

[0051] As an example, refer to Figure 2 , the stacking unit 30 is positioned closer to the first positive electrode supply unit 21, and can receive the supply of the positive electrode sheet 110 from the first positive electrode supply unit 21. Subsequently, the stacking unit 30 is moved so as to be positioned adjacent to the second positive electrode supply unit 22 far from the stacking unit 30 among the positive electrode supply units 20, so as to laminate the negative electrode-separator assembly 150. That is, it can be moved to a position similar to Figure 1 Furthermore, the stacking unit 30 is moved to be adjacent to the second positive electrode supply unit 22 , thereby enabling the negative electrode-separator assembly 150 to be positioned on the uppermost positive electrode sheet 110 of the stacking unit 30 .

[0052] Therefore, according to the electrode assembly manufacturing equipment 1 of the present embodiment, the negative electrode-diaphragm assembly 150 is supplied, thereby forming a plurality of positive electrode supply units 20, and the stacking unit 30 laminates the positive electrode sheet 110 on the negative electrode-diaphragm assembly 150 while moving between the plurality of positive electrode supply units 20, thereby being able to improve productivity compared to conventional electrode assembly manufacturing equipment.

[0053] Next, a negative electrode-separator assembly supplied to the electrode assembly manufacturing apparatus according to the present embodiment and an electrode assembly manufactured by the electrode assembly manufacturing apparatus according to the present embodiment will be described.

[0054] Figure 3 is a diagram illustrating a method of manufacturing a negative electrode-separator assembly inserted into an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure. Figure 4 It is shown by Figure 3 Side view of a negative electrode-diaphragm assembly manufactured by the manufacturing method.

[0055] Figure 5 It is shown Figure 21 is a side view of an electrode assembly of section A, where section A is an electrode assembly manufactured by an electrode assembly manufacturing apparatus according to an embodiment of the present disclosure.

[0056] The negative electrode-separator assembly 150 inserted into the electrode assembly manufacturing apparatus 1 according to the embodiment of the present disclosure may be formed by laminating a long sheet-shaped separator 130 and a negative electrode sheet 120 .

[0057] At this time, refer to Figure 3 In the process of forming the negative electrode-diaphragm assembly 150, the long sheet of negative electrode sheet 121 is inserted into the negative electrode-diaphragm assembly manufacturing equipment, and then the long sheet of negative electrode sheet 121 can be cut to form the negative electrode sheet 120, but it is not limited to this, and the negative electrode sheet 120 itself can also be inserted.

[0058] On the other hand, the diaphragm 130 may be provided as two long sheet-like diaphragms 130 .

[0059] Therefore, if Figure 4 As shown, the negative electrode-separator assembly 150 may be formed in a state where a plurality of negative electrode sheets 120 are interposed between the inner side surfaces of two separators 130 facing each other. At this time, the plurality of negative electrode sheets 120 interposed between the separators 130 may be arranged in the longitudinal direction ( Figure 4 They are arranged spaced apart from each other in the horizontal direction (in the horizontal direction).

[0060] In addition, in order to form the negative electrode-separator assembly 150, a heating and lamination process is further performed, thereby being able to form the final negative electrode-separator assembly 150. Therefore, the separator 130 and the negative electrode sheet 120 can be bonded to each other, and a stronger negative electrode-separator assembly 150 and electrode assembly 100 can be formed.

[0061] In addition, the electrode assembly 100 manufactured by supplying the above-described negative electrode-separator assembly 150 to the electrode assembly manufacturing apparatus 1 may be manufactured in such a manner that the negative electrode-separator assembly 150 and the positive electrode sheet 110 are folded and laminated using a zigzag lamination method.

[0062] Specifically, refer to Figure 5 The electrode assembly 100 may be manufactured by folding the connection portion formed on the separator 130 in opposite directions. Here, the connection portion may be a portion of the electrode assembly 100 where the positive electrode sheet 110 or the negative electrode sheet 120 is not provided and only the separator 130 exists.

[0063] In particular, refer to Figure 1 and Figure 2, the stacking 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 moving direction 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 moving direction 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 connection portion formed on the separator 130 of the electrode assembly 100 may be folded in directions opposite to each other.

[0064] According to the above described embodiment, the negative electrode-separator assembly in which negative electrode sheets and separators are stacked alternately with positive electrode sheets has been described, but an embodiment in which the positive electrode-separator assembly in which positive electrode sheets and separators are stacked alternately with negative electrode sheets is also possible.

[0065] However, in the case where the negative electrode is designed to be larger than the positive electrode during the production process, an embodiment in which a negative electrode-separator assembly in which a negative electrode sheet is laminated on a separator is supplied may be more preferable in consideration of process margin.

[0066] Next, an electrode assembly manufacturing apparatus according to a comparative example will be described.

[0067] Figure 6 is a side view of an electrode assembly manufacturing apparatus according to a comparative example. Figure 7 is a side view showing an electrode assembly manufactured by an electrode assembly manufacturing apparatus according to a comparative example.

[0068] Reference Figure 6 and Figure 7 , the electrode assembly manufacturing apparatus 200 according to the comparative example may include a positive electrode supply unit and a negative electrode supply unit, a separator 230 is inserted into the positive electrode supply unit and the negative electrode supply unit, and a positive electrode sheet 210 and a negative electrode sheet 220 are supplied.

[0069] Therefore, the stacking unit 260 may move between the positive electrode supply unit and the negative electrode supply unit and receive the positive electrode sheet 210 and the negative electrode sheet 220 transferred from the holding unit 270 to form the electrode assembly 250 .

[0070] In addition, since the electrode assembly 250 manufactured by the electrode assembly manufacturing apparatus 200 according to the comparative example includes a single-piece separator 230, it can have a structure of the electrode assembly 250 in which the positive electrode sheet 210 or the negative electrode sheet 220 is arranged around a single separator 230, rather than a structure in which the negative electrode sheet 120 is located between two separators 130.

[0071] At this time, the conventional electrode assembly manufacturing apparatus 200 has a limitation in increasing the production speed because the positive electrode sheet 210 and the negative electrode sheet 220 must be laminated on the separator 230 , respectively.

[0072] On the other hand, the electrode assembly manufacturing apparatus 1 according to the embodiment of the present disclosure laminates the positive electrode sheets 110 after inserting the negative electrode-separator assembly 150 , which makes it possible to ensure productivity twice that of the conventional electrode assembly manufacturing apparatus 200 .

[0073] Next, a method of manufacturing an electrode assembly according to another embodiment of the present disclosure will be described.

[0074] The manufacturing method of the electrode assembly according to the present embodiment includes: the step of forming a negative electrode-diaphragm assembly 150, the negative electrode-diaphragm assembly 150 including two sheet-like separators 130 and a plurality of negative electrode sheets 120 continuously located between the inner surfaces of the separators 130 facing each other; the step of setting the negative electrode-diaphragm assembly 150 in a stacking unit 30; the step of laminating the positive electrode sheet 110 on the outer surface of the separator 130 of the negative electrode-diaphragm assembly 150 set in the stacking unit 30; and the step of moving the stacking unit 30 and laminating the negative electrode-diaphragm assembly 150 on the laminated positive electrode sheet 110.

[0075] At this time, the step of laminating the positive electrode sheet 110 on the outer surface of the separator 130 of the negative electrode-separator assembly 150 set in the stacking unit 30 can be a step in which the holding unit 40 holds the positive electrode sheet 110 from the positive electrode supply unit 20 and laminates the held positive electrode sheet 110 on the negative electrode-separator assembly 150 set in the stacking unit 30.

[0076] More specifically, the stacking unit 30 is located between the first positive electrode supply unit 21 and the second positive electrode supply unit 22, and can move and reciprocate between them, as described above. Therefore, the step of moving the stacking unit 30 and laminating the negative electrode-separator assembly 150 on the laminated positive electrode sheet 110 can be a step in which the stacking 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 can be laminated on the uppermost positive electrode sheet 110 of the stacking unit 30.

[0077] Thus, the manufacturing method of the electrode assembly according to the present embodiment forms the negative electrode-separator assembly 150 , receives the supply of the positive electrode sheets 110 from the plurality of positive electrode supply units 20 , and laminates them, thereby being able to provide a manufacturing method of the electrode assembly with improved productivity.

[0078] The present invention has been described in detail with reference to the preferred embodiments of the present invention. However, it will be appreciated by those skilled in the art that the scope of the present disclosure is not limited thereto, and that various modifications and improvements may be made in these embodiments without departing from the principles and concepts of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0079] [Explanation of Reference Numerals]

[0080] 1: Electrode assembly manufacturing equipment

[0081] 10: Negative electrode-diaphragm assembly supply unit

[0082] 20: Positive electrode supply unit

[0083] 21, 22: First positive electrode supply unit and second positive electrode supply unit

[0084] 30: Stacking unit

[0085] 40: Holding unit

[0086] 100: Electrode assembly

[0087] 110: Positive electrode

[0088] 120: Negative electrode

[0089] 130: Diaphragm

[0090] 150: Negative electrode-diaphragm assembly

Claims

1. An electrode assembly manufacturing device, the electrode assembly manufacturing device comprising: A first electrode-diaphragm assembly supply unit, the first electrode-diaphragm assembly supply unit supplies a first electrode-diaphragm assembly, the first electrode-diaphragm assembly comprising: a plurality of first electrode sheets, the plurality of first electrode sheets being located between sheet-shaped diaphragms facing each other; a second electrode supply unit, the second electrode supply unit supplies a second electrode sheet, the second electrode sheet being laminated to be located on an outer side surface of the separator of the first electrode-separator assembly; a stacking unit on which an electrode assembly formed by laminating the first electrode-diaphragm assembly and the second electrode sheet is placed; and A holding unit holds the second electrode sheet from the second electrode supply unit and moves the second electrode sheet.

2. The electrode assembly manufacturing apparatus according to claim 1, wherein: The second electrode supply unit includes a 2-1 electrode supply unit and a 2-2 electrode supply unit, and The stacking unit is disposed between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

3. The electrode assembly manufacturing equipment according to claim 2, wherein: The stacking unit moves between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

4. The electrode assembly manufacturing apparatus according to claim 3, wherein: The stacking unit moves on a straight line forming a shortest distance between the 2-1st electrode supply unit and the 2-2nd electrode supply unit.

5. The electrode assembly manufacturing apparatus according to claim 1, wherein: The holding unit moves between the second electrode supply unit and the stacking unit.

6. The electrode assembly manufacturing apparatus according to claim 1, wherein: The holding unit holds the second electrode sheet from the second electrode supply unit adjacent to the holding unit and moves the held second electrode sheet to the stacking unit, and The stacking unit having received the transfer of the held second electrode sheet moves so that the first electrode-separator assembly is laminated on the stacking unit.

7. The electrode assembly manufacturing apparatus according to claim 6, wherein: The stacking unit is moved to be adjacent to a second electrode supply unit, which is away from the stacking unit, among a plurality of second electrode supply units, so as to laminate the first electrode-separator assembly, and The stacking unit is moved to be adjacent to the second electrode supply unit among the plurality of second electrode units, thereby positioning the first electrode-separator assembly on an uppermost second electrode sheet of the stacking unit.

8. The electrode assembly manufacturing apparatus according to claim 1, wherein: The first electrode-separator assembly is in a state where 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 cathode, and the second electrode is a cathode.

10. A method for manufacturing an electrode assembly, the method comprising the following steps: forming a first electrode-diaphragm assembly, the first electrode-diaphragm assembly comprising two sheet-shaped diaphragms and a plurality of first electrode sheets continuously located between inner side surfaces of the sheet-shaped diaphragms facing each other; Disposing the first electrode-diaphragm assembly in a stacking unit; laminating a second electrode sheet on an outer side surface of a separator of the first electrode-separator assembly disposed in the stacking unit; as well as The stacking unit is moved and the first electrode-separator assembly is laminated on the laminated second electrode sheet.

11. The method for manufacturing an electrode assembly according to claim 10, wherein: The step of laminating the second electrode sheet on the outer side surface of the diaphragm of the first electrode-diaphragm assembly arranged in the stacking unit is the following steps: a holding unit holds the second electrode sheet from the second electrode supply unit and laminates the held second electrode sheet on the first electrode-diaphragm assembly arranged in the stacking unit.

12. The method for manufacturing an electrode assembly according to claim 10, wherein: The stacking unit is located between the 2-1 electrode supply unit and the 2-2 electrode supply unit.

13. The method for manufacturing an electrode assembly according to claim 12, wherein: The step of moving the stacking unit and laminating the first electrode-diaphragm assembly on the laminated second electrode sheet is the following steps: moving the stacking unit between the 2-1 electrode supply unit and the 2-2 electrode supply unit, and laminating the first electrode-diaphragm assembly on the topmost second electrode sheet of the stacking unit.

14. The method for manufacturing an electrode assembly according to claim 10, wherein: In the step of arranging the first electrode-separator assembly in a stacking unit, the first electrode-separator assembly is in a state in which the first electrode sheet is laminated between the sheet-like separators.

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

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