Device for folding bags

Abstract

A device for folding a bag having a first cup portion and a second cup portion, each of the first and second cup portions having a concave recessed shape to accommodate an electrode assembly, a first outer peripheral portion being formed flatly along the outer periphery of the first cup portion and a second outer peripheral portion being formed flatly along the outer periphery of the second cup portion in the bag, the device comprising: a lower seat portion on which the first cup portion is placed; an upper seat portion on which the second cup portion is placed; and a guide having a first guide member and a second guide member, the first guide member being fixed to the lower seat portion and having an upward projection therefrom. The first protrusion, the second guide fixed to the upper seat and having a second protrusion protruding upward therefrom, the first protrusion and the second protrusion protruding from the first guide and the second guide in close contact with each other to form a support protrusion; and a pressing part, which, when the first cup and the second cup are respectively placed on the lower seat and the upper seat, causes the connecting part of the first outer periphery and the second outer periphery to be in close contact with the support protrusion, wherein, in the state where the pressing part causes the connecting part to be in close contact with the support protrusion, the upper seat rotates so that the second cup folds onto the first cup.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2020-0145441, filed on November 3, 2020, and Korean Patent Application No. 10-2021-0148732, filed on November 2, 2021, which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to an apparatus for folding a bag having a first cup portion and a second cup portion to accommodate an electrode assembly, and more specifically, to an apparatus for more effectively supporting the portion to be folded between the first cup portion and the second cup portion to facilitate precise folding in a selected portion of the folded bag. Background Technology

[0004] Typically, rechargeable batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, and lithium-ion polymer batteries. These rechargeable batteries are used not only in small products such as digital cameras, P-DVD players, MP3 players, mobile phones, PDAs, portable game devices, power tools, and e-bikes, but also in larger products requiring higher power, such as electric and hybrid vehicles, energy storage devices for storing excess electricity or new renewable energy sources, and backup energy storage devices.

[0005] To manufacture this secondary battery, a slurry of electrode active materials is coated onto positive and negative current collectors to form positive and negative electrodes. The positive and negative electrodes are then alternately stacked with a separator between them to form an electrode assembly of a predetermined shape. Afterward, a battery casing houses the electrode assembly, and the battery casing is sealed after electrolyte is injected to manufacture the secondary battery.

[0006] Depending on the material of the casing that houses the electrode assembly, secondary batteries are classified into pouch type, can type, etc. Pouch type secondary batteries are manufactured so that the electrode assembly is housed and sealed in a pouch made of a flexible polymer material, while can type secondary batteries are manufactured so that the electrode assembly is housed in a casing made of a material such as metal or plastic.

[0007] The bag, intended to provide a casing for a pouch-type secondary battery, is manufactured such that one or two cup portions are formed by pressing a flexible bag film. After the cup portions are formed, the receiving space of the cup portions accommodates the electrode assembly, and the outer periphery of the receiving space of the cup portions is sealed to manufacture the secondary battery.

[0008] Reference Figure 1a The diagram illustrates the configuration before and after the electrode assembly is installed in the bag. The material of the bag 10 is changed by pressing to form a first cup portion 1 and a second cup portion 2. Each of the first cup portion 1 and the second cup portion 2 is formed as a recessed shape in which a space of predetermined size is formed. The unpressed portion forms a first outer peripheral portion 1a and a second outer peripheral portion 2a along the outer periphery.

[0009] Furthermore, when the electrode assembly 4 is installed in the first cup portion 1, the second cup portion 2 folds along the connecting portion 3, which is the portion folded between the first cup portion 1 and the second cup portion 2, and the first outer peripheral portion 1a and the second outer peripheral portion 2a come into contact with each other. Then, heat and pressure are applied to the contacting first outer peripheral portion 1a and the second outer peripheral portion 2a, followed by sealing.

[0010] Additionally, refer to Figure 1b The diagram illustrates the construction of a conventionally folded bag. A conventional folding device has a structure in which an upper seat 40 and a lower seat 30 are connected by guides 50 (50a and 50b). One side 50b of the guide is connected to the upper seat 40, and the other side 50a is connected to the lower seat 30. Furthermore, the guide 50 has a structure in which a support protrusion 51 protrudes to support the bottom surface of the connecting portion 3. One side 51b of the support protrusion 51 protrudes from one side 50b of the guide, and the other side 51a protrudes from the other side 50a of the guide.

[0011] With the first cup portion 1, the second cup portion 2, and the connecting portion 3 placed on the lower seat portion 30, the upper seat portion 40, and the support protrusion 51, when the upper seat portion 40 rotates, the connecting portion 3 is folded, causing the second cup portion 2 to be placed on the first cup portion 1, as shown. Figure 1b As shown in the image.

[0012] However, in this conventional structure, there is a situation where the connecting part 3 separates from the support protrusion 51 during the rotation of the upper seat part 40 and is therefore not fully folded. In particular, since the separation rate may vary depending on the flexibility, strength, etc. of the bag 10, it is difficult to ensure consistent folding quality. Summary of the Invention

[0013] Technical issues

[0014] Therefore, the main objective of this disclosure is to provide a device for a folding bag that can solve the problem of incomplete folding caused by the separation of the connecting part and the support protrusion.

[0015] Technical solution

[0016] To address the aforementioned problems, according to the present invention, a device for folding a bag having a first cup portion and a second cup portion, each of the first cup portion and the second cup portion having a concave shape to accommodate an electrode assembly, wherein a first outer peripheral portion is formed flatly along the outer periphery of the first cup portion and a second outer peripheral portion is formed flatly along the outer periphery of the second cup portion in the bag, the device comprising: a lower seat portion on which the first cup portion is placed; an upper seat portion on which the second cup portion is placed; and a guide having a first guide member and a second guide member, the first guide member being fixed to the lower seat portion and having an upward projection therefrom. The first protrusion protrudes from the upper seat, the second guide is fixed to the upper seat and has a second protrusion protruding upward therefrom, the first protrusion and the second protrusion protruding from the first guide and the second guide are in close contact with each other to form a support protrusion; and a pressing part, which, when the first cup and the second cup are respectively placed on the lower seat and the upper seat, causes the connecting portion of the first outer periphery and the second outer periphery to be in close contact with the support protrusion, wherein, in the state where the pressing part causes the connecting portion to be in close contact with the support protrusion, the upper seat rotates so that the second cup folds onto the first cup.

[0017] When the first guide and the second guide are in horizontal contact with each other, the lower seat and the upper seat can be horizontal.

[0018] The first protrusion can protrude from the first guide, the second protrusion can protrude from the second guide, and the first protrusion and the second protrusion can be in close contact with each other to form the support protrusion, wherein, when the upper seat rotates, the first protrusion and the second protrusion in close contact with each other can be separated to separate from each other.

[0019] The first protrusion may be integrally formed with the first guide, and the second protrusion may be integrally formed with the second guide.

[0020] The first protrusion and the second protrusion can respectively define the surfaces in contact with the first cup portion and the second cup portion as inclined surfaces, such that the support protrusion has a cross-sectional shape that becomes sharper towards the end.

[0021] The first corner formed between mutually perpendicular surfaces as the first protrusion protrudes from the first guide, and the second corner formed between mutually perpendicular surfaces as the second protrusion protrudes from the second guide, can be formed as curved surfaces.

[0022] The pressing part may include a main body and an extension. The main body causes the connecting portion of the first outer peripheral portion and the second outer peripheral portion to be in close contact with the support protrusion. The extension extends from the main body and causes the side wall surface of the first cup portion to be in close contact with the first protrusion when the main body presses the connecting portion.

[0023] A mounting groove may be formed between the extension and the main body, so that the upper end of the support protrusion is placed thereon.

[0024] As the first protrusion protrudes from the first guide, a first corner portion can be formed between mutually perpendicular surfaces, and when the main body portion of the pressing portion brings the connecting portion into close contact with the support protrusion, the extension portion can bring the first cup portion into close contact with the first corner portion.

[0025] Furthermore, the pressing portion can be configured such that the end protrudes from the extension to such a degree that when the extension is in close contact with the first protrusion, the main body portion contacts only the first protrusion and not the second protrusion.

[0026] The bag can be manufactured by stacking an inner layer made of a polymer; an outer layer made of a polymer of a different type than the inner layer; and a metal layer made of aluminum material stacked between the inner and outer layers.

[0027] Alternatively, the folding bag apparatus provided in this disclosure may include a guide in which the second guide is omitted and only the first guide is included.

[0028] That is, the folding bag device according to this disclosure may include a lower seat, an upper seat and a pressing part, and the guide may be configured to be fixed to the lower seat and have an upwardly projecting support protrusion.

[0029] Beneficial effects

[0030] The present invention, which has the above-described technical features, can prevent the separation of the connecting part because the pressing part makes the connecting part in close contact with the support protrusion during the rotation of the upper seat.

[0031] The first and second protrusions define the surfaces that contact the first and second cup portions as inclined planes, respectively, so that the support protrusions have a cross-sectional shape that becomes sharper towards their ends. Therefore, the first and second protrusions can make closer contact with the outer surfaces of the first and second cup portions.

[0032] The pressing portion may include a main body and an extension. The main body causes the connecting portion of the first and second outer peripheral portions to come into close contact with the support protrusion. The extension extends from the main body and causes the sidewall surface of the first cup portion to come into close contact with the first protrusion when the main body presses the connecting portion. Therefore, the wider portion (e.g., the inner surface of the first cup portion) comes into close contact with the support protrusion, so the connecting portion can be more stably supported on the support protrusion during folding.

[0033] Furthermore, a mounting groove can be formed between the extension and the main body, allowing the upper end of the support protrusion to rest thereon. Therefore, the pressing part can be stably supported on the support protrusion.

[0034] Furthermore, as the first protrusion extends from the first guide, a first corner can be formed between mutually perpendicular surfaces, and when the main body of the pressing part brings the connecting part into close contact with the support protrusion, the extension can bring the first cup part into close contact with the first corner. Therefore, separation of the pressing part can be prevented, and deformation of the first cup part can be prevented. Attached Figure Description

[0035] Figure 1a This is a diagram illustrating the construction of the electrode assembly before and after it is installed in the bag.

[0036] Figure 1b It is a diagram illustrating the construction of a bag by folding it according to a method based on relevant technology.

[0037] Figure 2 This is a diagram illustrating the structure of a folded bag with the pressing part supporting the connecting part.

[0038] Figure 3 This diagram illustrates the structure of a folded bag with an extension forming a pressing part that supports the connecting part.

[0039] Figure 4 It is a diagram illustrating the structure in which the pressing part with the extension contacts the supporting protrusion.

[0040] Figure 5 It is a diagram illustrating the structure in which the pressing part with the extension is separated from the support protrusion.

[0041] Figure 6 It is a diagram illustrating the structure of the extension formed in the pressing part extending to the first corner.

[0042] Figure 7 It is a diagram illustrating the structure in which the pressing part of the relatively short main body contacts the supporting protrusion. Detailed Implementation

[0043] The present disclosure will be described in detail below with reference to the accompanying drawings to enable those skilled in the art to readily implement it. However, the present disclosure may be implemented in different forms and should not be construed as limited to the embodiments set forth herein.

[0044] For clarity in describing this disclosure, parts irrelevant to the description will be excluded. Throughout the application, the same reference numerals refer to the same elements.

[0045] Furthermore, the terms or words used in this specification and claims should not be construed as having their ordinary or dictionary-based meanings, but rather should be interpreted as meanings and concepts within the scope of this invention, based on the principle that the inventor is able to properly define the terms and concepts to best describe and explain his or her invention.

[0046] This disclosure relates to an apparatus for folding a bag 10 having a first cup portion 1 and a second cup portion 2, each of the first cup portion 1 and the second cup portion 2 having a recessed shape to accommodate an electrode assembly, wherein a first outer peripheral portion 1a is formed flatly along the outer periphery of the first cup portion 1 and a second outer peripheral portion 2a is formed flatly along the outer periphery of the second cup portion 2 in the bag 10. The apparatus for folding a bag according to this disclosure will be described in more detail below with reference to the accompanying drawings.

[0047] like Figure 2 As shown, Figure 2 The diagram illustrates the structure of a folding bag with the pressing part supporting the connecting part. The folding device according to this disclosure includes a lower seat 30, an upper seat 40, a guide 50, and a pressing part 60.

[0048] The lower seat portion 30 is sized to allow the first cup portion 1 of the bag 10 to rest on it, and the resting surface is defined as a flat surface. The upper seat portion 40 is sized to allow the second cup portion 2 of the bag 10 to rest on it, and the resting surface is defined as a flat surface.

[0049] The guide 50 includes a first guide 50a and a second guide 50b. The first guide 50a has a structure in which it is fixed to one side of the lower seat 30 (i.e., the side facing the upper seat) and has a first protrusion 51a protruding upward therefrom.

[0050] The second guide 50b is fixed to one side of the upper seat 40 (i.e., the side facing the lower seat) and has a second protrusion 51b protruding upward therefrom. When the upper seat 40 and the lower seat 30 are positioned parallel to each other, the first guide 50a and the second guide 50b are in close contact with each other. When the upper seat 40 is rotated, the first guide 50a and the second guide 50b can be separated.

[0051] That is to say, in guide 50, the first guide 50a and the second guide 50b can be in close contact with each other and can be separated (in this document, separation means separating such that the angle formed between them increases, such as...). Figure 2 (As shown in the diagram). The first protrusion 51a and the second protrusion 51b form a support protrusion 51 when they are in close contact with each other.

[0052] Furthermore, the pressing part 60 further provided in this disclosure is close to the connecting part 3 of the first outer peripheral part 1a and the second outer peripheral part 2a, so that when the first cup part 1 and the second cup part 2 are respectively placed on the lower seat part 30 and the upper seat part 40, the connecting part 3 is in close contact with the support protrusion 51.

[0053] Therefore, as Figure 2 As shown, with the first cup portion 1 and the second cup portion 2 respectively placed on the lower seat portion 30 and the upper seat portion 40 and the connecting portion 3 placed on the support protrusion 51, the pressing portion 60 makes the connecting portion 3 and the support protrusion 51 come into close contact.

[0054] Furthermore, the upper seat 40 begins to rotate so that the second cup portion 2 is folded onto the first cup portion 1. The pressing portion 60 separates before the upper seat 40 contacts the pressing portion 60. The upper seat 40 rotates upward until it is parallel to the lower seat 30.

[0055] Furthermore, when the first guide 50a and the second guide 50b provided in this disclosure are in horizontal contact with each other, the lower seat portion 30 and the upper seat portion 40 are horizontal. The first guide 50a is integrally formed to have a first protrusion 51a protruding therefrom, and the second guide 50b is integrally formed to have a second protrusion 51b protruding therefrom. Therefore, the first protrusion 51a and the second protrusion 51b are in close contact with each other to form a support protrusion 51. In addition, when the upper seat portion 40 rotates, the first protrusion 51a and the second protrusion 51b that are in close contact with each other separate to separate from each other. Here, the separation of the first protrusion 51a and the second protrusion 51b that are in close contact with each other means that the second protrusion 51b separates from the first protrusion 51a while rotating with the upper seat portion 40. In particular, it can be said that the second protrusion 51b rotates about the end protruding from the first protrusion 51a and the second protrusion 51b as the center of rotation, and thus the separation increases the angle between the first protrusion 51a and the second protrusion 51b. Furthermore, the pressing part 60 provided in this disclosure may only include a main body part 61 having a shape that becomes sharper towards the end, and may further include an extension part 62 extending from the main body part 61.

[0056] Reference Figure 3 , Figure 4 and Figure 5 , Figure 3The diagram illustrates the structure of the folded bag 10 with the pressing part 60, in which the extension 62 is formed, supporting the connecting part 3. Figure 4 The diagram illustrates the structure in which the pressing portion 60, which has an extension 62, contacts the support protrusion 51. Figure 5 The diagram illustrates a structure in which the pressing portion 60, in which the extension portion 62 is formed, is spaced apart from the support protrusion 51. The pressing portion 60 provided in this disclosure includes a main body portion 61 and an extension portion 62. The main body portion 61 makes the connecting portion 3 of the first outer peripheral portion 1a and the second outer peripheral portion 2a in close contact with the support protrusion 51. The extension portion 62 extends along one side of the main body portion 61 to make the area larger and makes the side wall surface of the first cup portion 1 in close contact with the first protrusion 51a when the main body portion 61 presses the connecting portion 3.

[0057] like Figure 3 As shown, when the main body 61 brings the connecting portion 3 into close contact with the support protrusion 51, the extension 62 brings the outer surface of the first cup portion 1 into close contact with the side surface of the support protrusion 51. Therefore, the possibility of separation that may occur in the first cup portion 1 can be further reduced.

[0058] In addition, such as in Figure 5 As shown more clearly, a mounting groove 63 is formed between the extension 62 and the main body 61, allowing the upper end of the support protrusion 51 to rest thereon. The mounting groove 63 allows the pressing part 60 to rest on the support protrusion 51, so that the extension 62 can be held on the support protrusion 51 when the main body 61 supports the connecting part 3. Therefore, the pressing part 60 can be held more stably in a fixed position.

[0059] like Figure 4 and Figure 5 As shown in the present disclosure, the first protrusion 51a and the second protrusion 51b define the surfaces that contact the first cup portion 1 and the second cup portion 2 as inclined surfaces, such that the support protrusion 51 has a cross-sectional shape that becomes sharper toward the end.

[0060] That is, after being processed by pressing, the first cup portion 1 and the second cup portion 2 cool and shrink, forming a slightly upwardly inclined structure, rather than a completely vertical structure. Therefore, the first protrusion 51a and the second protrusion 51b define the surfaces that contact the first cup portion 1 and the second cup portion 2 as inclined surfaces, thereby ensuring close contact with the outer surfaces of the first cup portion 1 and the second cup portion 2 to avoid unnecessary gaps.

[0061] Furthermore, for the same reason (considering shrinkage after pressing, or intentionally), the corners of the first cup portion 1 and the second cup portion 2 have a structure rounded with a predetermined curvature. Therefore, in order to make the support protrusion 51 in close contact with the rounded portions of the first cup portion 1 and the second cup portion 2, the first corner portion 52a formed between mutually perpendicular surfaces as the first protrusion 51a protrudes from the first guide 50a, and the second corner portion 52b formed between mutually perpendicular surfaces as the second protrusion 51b protrudes from the second guide 50b, are formed as curved surfaces.

[0062] like Figure 6 As shown, Figure 6 The diagram illustrates the structure of the extension 62 formed in the pressing part 60 extending to the first corner part 52a. The extension 62 may have an extension structure so that when the main body part 61 of the pressing part makes the connecting part 3 and the support protrusion 51 in close contact, the first cup part 1 and the first corner part 52a are in close contact.

[0063] Additionally, the bag 10 provided in this disclosure may have a structure in which an inner layer made of a polymer, an outer layer made of a polymer of a different type than the inner layer, and a stacked metal layer made of aluminum material stacked between the inner and outer layers, and is manufactured such that the inner layer constitutes a sealant layer, the outer layer constitutes a drawing assistance layer and a surface protection layer, and the metal layer constitutes a moisture barrier layer.

[0064] The sealant layer formed by the inner layer can be made of a polymer and is formed as the innermost layer in direct contact with the electrode assembly. Because the sealant layer is in direct contact with the electrode assembly, it possesses insulation and resistance to electrolyte corrosion. Due to the need for complete sealing to prevent material movement between the interior and exterior, the sealant layer exhibits high sealing performance. This sealant layer can be made of at least one material selected from the group consisting of: polyethylene, polypropylene, polycarbonate, polyethylene terephthalate, polyvinyl chloride, acrylic polymers, polyacrylonitrile, polyimide, polyamide, cellulose, aromatic polyamide, nylon, polyester, poly(p-phenylenebenzodioxazole), polyarylate, polytetrafluoroethylene, and glass fiber.

[0065] The moisture barrier layer formed by the metal layer provides the functions of ensuring the mechanical strength of the bag 10, preventing the entry and exit of external gases and moisture, and preventing electrolyte leakage.

[0066] The outermost layer includes a surface protective layer to protect the bag 10 from friction and impact with the outside and to electrically insulate the electrode assembly from the outside. Additionally, a drawing aid layer may be included in the outer layer between the surface protective layer and the moisture barrier layer, providing protection against separation of the surface protective layer and the moisture barrier layer during drawing.

[0067] The present disclosure having the above-described technical features can prevent the separation of the connecting part 3, because the pressing part 60 makes the connecting part 3 come into close contact with the support protrusion 51 during the rotation of the upper seat part 40.

[0068] The first protrusion 51a and the second protrusion 51b define the surfaces that contact the first cup portion 1 and the second cup portion 2 as inclined surfaces, such that the support protrusion 51 has a cross-sectional shape that becomes sharper towards the end. Therefore, the first protrusion 51a and the second protrusion 51b can make closer contact with the outer surfaces of the first cup portion 1 and the second cup portion 2.

[0069] In addition, the protruding length of the main body 61 of the pressing part 60 can be limited so that the rotation of the second cup part 2 will not be interfered with when the connecting part 3 approaches the support protrusion 51.

[0070] Reference Figure 7 The diagram shows a structure in which the pressing part 60, which has a body part 61 that is relatively shorter than the pressing part 60 described above, contacts the support protrusion 51. The pressing part 60 can be formed to be slightly shorter than in the above embodiment to prevent interference with the folding of the connecting part 3 depending on the thickness or material of the bag, and to adjust the part of the connecting part 3 that begins to bend.

[0071] That is, the pressing part 60 can be configured such that the length of the end protruding from the extension 62 is limited to such that when the extension 62 is in close contact with the first protrusion 51a, the main body 61 only contacts the first protrusion 51a and not the second protrusion 51b.

[0072] Furthermore, the folding bag device described in this disclosure may include a guide in which the second guide 50b is omitted and only the first guide 50a is included.

[0073] That is to say, such as Figure 2 and Figure 3 As shown, the pressing part 60 can press the connecting part 3 onto the surface of the first protrusion 51a during the rotation of the second cup part 2, so the second guide 50b can be omitted.

[0074] Here, the first protrusion 51a may protrude only from the first guide 50a and have a shape combined with the second protrusion 51b.

[0075] Therefore, the folding bag device omitting the second guide 50b includes: a lower seat portion on which a first cup portion is placed; an upper seat portion on which a second cup portion is placed; and a pressing portion that, when the first cup portion and the second cup portion are respectively placed on the lower seat portion and the upper seat portion, causes the connecting portion of the first outer periphery portion and the second outer periphery portion to come into close contact with the support protrusion. Here, the guide can be configured as a structure consisting only of the first guide, i.e., wherein the guide is fixed to the lower seat portion and the first protrusion 51a protruding upward therefrom forms the support protrusion 51.

[0076] Alternatively, the guide 50 may include a second guide 50b and a first guide 50a, and may be configured such that a first protrusion 51a is formed only on the first guide 50a and a second protrusion 51b is formed on the second guide 50b.

[0077] In this disclosure with the above-described structure, the pressing portion 60 includes a main body 61 and an extension 62. The main body 61 brings the connecting portion 3 of the first outer peripheral portion 1a and the second outer peripheral portion 2a into close contact with the support protrusion 51. The extension 62 extends from the main body 61 and, when the main body 61 presses the connecting portion 3, brings the sidewall surface of the first cup portion 1 into close contact with the first protrusion 51a. Therefore, the wider portion comes into close contact with the support protrusion 51, thus providing more stable support for the connecting portion during folding.

[0078] Furthermore, a mounting groove 63 is formed between the extension 62 and the main body 61, allowing the upper end of the support protrusion 51 to rest thereon. Therefore, the pressing part 60 can be stably supported on the support protrusion 51.

[0079] Furthermore, as the first protrusion 51a protrudes from the first guide 50a, the first corner portion 52a is formed between mutually perpendicular surfaces, and when the main body 61 of the pressing portion 60 brings the connecting portion 3 into close contact with the support protrusion, the extension 62 brings the first cup portion 1 into close contact with the first corner portion 52a. Therefore, separation of the pressing portion 60 can be prevented, and deformation of the first cup portion 1 can be prevented.

[0080] Although this disclosure has been described with reference to the defined embodiments and accompanying drawings, this disclosure is not limited thereto and can be implemented in various ways by those skilled in the art to which this disclosure pertains, within the equivalent technical concept of this disclosure and the appended claims.

[0081] [Label Explanation]

[0082] 10: bag

[0083] 30: lower seat

[0084] 40: Theravada Buddhism

[0085] 50: Guide

[0086] 60: Pressing part.

Claims

1. A device for folding a bag having a first cup portion and a second cup portion, each of the first cup portion and the second cup portion having a concave recessed shape to receive an electrode assembly, a first outer peripheral portion being formed flatly along the outer periphery of the first cup portion and a second outer peripheral portion being formed flatly along the outer periphery of the second cup portion in the bag, the device comprising, The lower seat portion, wherein the first cup portion is configured to be placed on the lower seat portion; The upper seat portion, wherein the second cup portion is configured to be placed on the upper seat portion; The guide has a first guide and a second guide, the first guide being fixed to the lower seat and having a first protrusion protruding upward therefrom, the second guide being fixed to the upper seat and having a second protrusion protruding upward therefrom, the first protrusion and the second protrusion protruding from the first guide and the second guide being in close contact with each other to form a support protrusion; as well as The pressing part, when the first cup part and the second cup part are respectively placed on the lower seat part and the upper seat part, makes the connecting part of the first outer peripheral part and the second outer peripheral part in close contact with the support protrusion. In the state where the pressing part makes the connecting part and the support protrusion in close contact, the upper seat is configured to rotate so that the second cup part folds onto the first cup part.

2. The apparatus of claim 1, wherein the lower seat and the upper seat are horizontal when the first guide and the second guide are in horizontal contact with each other.

3. The apparatus according to claim 2, wherein, When the upper part rotates, the first protrusion and the second protrusion, which were in close contact with each other, separate to separate from each other.

4. The apparatus of claim 3, wherein the first protrusion is integrally formed with the first guide, and the second protrusion is integrally formed with the second guide.

5. The device of claim 1, wherein the first protrusion and the second protrusion define the surfaces in contact with the first cup portion and the second cup portion, respectively, as inclined surfaces, such that the support protrusion has a cross-sectional shape that becomes sharper toward the end.

6. The device of claim 1, wherein the first corner formed between mutually perpendicular surfaces as the first protrusion protrudes from the first guide, and the second corner formed between mutually perpendicular surfaces as the second protrusion protrudes from the second guide, are formed as curved surfaces.

7. The device according to claim 1, wherein the pressing portion comprises a main body portion and an extension portion, the main body portion causing the connecting portion of the first outer peripheral portion and the second outer peripheral portion to be in close contact with the support protrusion, and the extension portion extending from the main body portion and causing the side wall surface of the first cup portion to be in close contact with the first protrusion when the main body portion presses the connecting portion.

8. The device according to claim 7, wherein a mounting groove is formed between the extension and the main body, such that the upper end of the support protrusion is mounted thereon.

9. The device of claim 7, wherein as the first protrusion protrudes from the first guide, a first corner is formed between mutually perpendicular surfaces, and When the main body of the pressing part brings the connecting part into close contact with the support protrusion, the extension brings the first cup part into close contact with the first corner part.

10. The device of claim 7, wherein the pressing portion is configured such that the end protrudes from the extension to such a degree that when the extension is in close contact with the first protrusion, the main body portion contacts only the first protrusion and not the second protrusion.

11. A device for folding a bag having a first cup portion and a second cup portion, each of the first cup portion and the second cup portion having a concave recessed shape to receive an electrode assembly, a first outer peripheral portion being formed flatly along the outer periphery of the first cup portion and a second outer peripheral portion being formed flatly along the outer periphery of the second cup portion in the bag, the device comprising, The lower seat portion, wherein the first cup portion is configured to be placed on the lower seat portion; The upper seat portion, wherein the second cup portion is configured to be placed on the upper seat portion; A guide member, which is fixed to the lower seat and has a support protrusion projecting upward therefrom; as well as The pressing part, when the first cup part and the second cup part are respectively placed on the lower seat part and the upper seat part, makes the connecting part of the first outer peripheral part and the second outer peripheral part in close contact with the support protrusion. In the state where the pressing part makes the connecting part and the support protrusion in close contact, the upper seat is configured to rotate so that the second cup part folds onto the first cup part.

12. The device of claim 11, wherein the pressing portion comprises a main body portion and an extension portion, the main body portion causing the connecting portion of the first outer peripheral portion and the second outer peripheral portion to be in close contact with the support protrusion, and the extension portion extending from the main body portion and causing the side wall surface of the first cup portion to be in close contact with the support protrusion when the main body portion presses the connecting portion.

13. The device according to claim 12, wherein a mounting groove is formed between the extension and the main body, such that the upper end of the support protrusion is mounted thereon.

14. The device of claim 12, wherein as the support protrusion protrudes from the guide, a first corner is formed between mutually perpendicular surfaces, and When the main body of the pressing part brings the connecting part into close contact with the support protrusion, the extension brings the first cup part into close contact with the first corner part.

15. The device according to any one of claims 1 to 14, wherein the bag is manufactured by stacking an inner layer made of a polymer; an outer layer made of a polymer of a different type than the inner layer; and a metal layer made of aluminum material stacked between the inner layer and the outer layer.

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