Pouch case manufacturing apparatus and pouch case manufacturing method

Abstract

Provided is a pouch case manufacturing apparatus comprising: a punch part provided above one surface of a pouch film; strippers provided above the one surface of the pouch film in the lateral direction of the punch part; first die parts provided under the other surface of the pouch film, and provided at positions corresponding to the strippers; and second die parts which are remote from the strippers so as to neighbor the first die parts, wherein the second die parts can hold the pouch film in cooperation with the punch part.

Description

Pouch case manufacturing device and pouch case manufacturing method

[0001] The present invention relates to a pouch case manufacturing device and a pouch case manufacturing method, and more specifically, to a pouch case manufacturing device and a pouch case manufacturing method that can be used for manufacturing a safe, high-capacity secondary battery.

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0106843, filed August 9, 2024, the entire disclosure of which is incorporated herein by reference.

[0003] Secondary batteries, unlike non-rechargeable primary batteries, are rechargeable and dischargeable. They are widely used in electronic devices such as mobile phones, laptops, and camcorders, as well as electric vehicles. In particular, lithium secondary batteries have a higher capacity than nickel-cadmium or nickel-hydrogen batteries and a higher energy density per unit weight, leading to a rapid increase in their use.

[0004] Various manufacturing methods have been proposed and applied to manufacture secondary batteries, but various efforts are being made to increase energy density and enhance product safety.

[0005] The first technical task to be achieved by the present invention is to provide a pouch case manufacturing device that can be used to manufacture a safe, high-capacity secondary battery.

[0006] The second technical task to be achieved by the present invention is to provide a method for manufacturing a pouch case that can be used for manufacturing a safe, high-capacity secondary battery.

[0007] The present invention provides a pouch case manufacturing device comprising: a punch portion provided on one side of a pouch film; a stripper provided on the one side of the pouch film in a lateral direction of the punch portion; a first die portion provided on the other side of the pouch film and provided at a position corresponding to the stripper; and a second die portion remote from the stripper and adjacent to the first die portion, wherein the second die portion is configured to cooperate with the punch portion to clamp the pouch film.

[0008] In some embodiments, the pouch case manufacturing device may further include a control unit configured to control operations of the punch unit, the stripper, the first die unit, and the second die unit.

[0009] In some embodiments, the control unit may be configured to pre-punch the pouch film by the relative movement of the punch unit and the stripper while the stripper and the first die unit fix the pouch film.

[0010] In some embodiments, the second die portion may be configured to be movable in a second direction perpendicular to the first direction in which the stripper and the first die portion are arranged.

[0011] In some embodiments, the control unit may be configured to move the second die unit toward the punch unit so that the punch unit and the second die unit pinch a portion of the pre-punched pouch film.

[0012] In some embodiments, to form a main cup portion in the pouch film, the control unit may be configured to move the stripper in a first direction relative to the punch portion while a portion of the pouch film is held between the punch portion and the second die portion.

[0013] In some embodiments, when the stripper is moved in the first direction relative to the punch portion, the control portion may be configured to prevent the second die portion and the punch portion from moving relatively.

[0014] In some embodiments, the pouch case manufacturing device may be configured such that when the stripper moves in the first direction relative to the punch portion, substantially no stretching of the pouch film occurs in a portion of the pouch film sandwiched between the second die portion and the punch portion.

[0015] In some embodiments, the stripper may be configured to be spaced apart in a first direction with respect to the first die portion and the second die portion may be configured to be spaced apart in a second direction with respect to the punch portion to release the pouch film after the main cup portion is formed.

[0016] The present invention provides a method for manufacturing a pouch case, comprising: a step of sandwiching a pouch film between a stripper surrounding a punch portion and a first die portion disposed below the stripper; a step of relatively moving the stripper and the first die portion sandwiching the pouch film in a first direction with respect to the punch portion to form a reserve cup portion; a step of moving the second die portion in a second direction perpendicular to the first direction to sandwich at least a portion of the reserve cup portion between a second die portion disposed below the first die portion and the punch portion; and a step of relatively moving the first die portion and the stripper with respect to the punch portion to form a main cup portion.

[0017] In some embodiments, in the step of moving the first die portion and the stripper relative to the punch portion to form the main cup portion, a portion of the spare cup portion may be maintained in a pinched state between the second die portion and the punch portion.

[0018] In some embodiments, in the step of moving the first die portion and the stripper relative to the punch portion to form the main cup portion, the second die portion and the punch portion may pinch the side walls of the spare cup portion.

[0019] In some embodiments, in the step of moving the first die portion and the stripper relative to the punch portion to form the main cup portion, the second die portion and the punch portion may pinch a corner of the spare cup portion.

[0020] In some embodiments, in the step of moving the first die portion and the stripper relative to the punch portion to form the main cup portion, the first die portion and the stripper can be moved in the first direction relative to the punch portion.

[0021] According to the present invention, a high-capacity secondary battery can be manufactured because pouch forming can be performed at a deeper depth without damaging the metal barrier layer.

[0022] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0023] Figure 1 is a schematic diagram showing a pouch case manufacturing device according to one embodiment of the present invention.

[0024] Figure 2 is a perspective view schematically showing a molding device according to one embodiment of the present invention.

[0025] Figures 3 to 9 are schematic diagrams showing a method for manufacturing a pouch case according to one embodiment of the present invention.

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention may be modified in various different forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. It is preferable to interpret that the embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art. Like numbers refer to like elements throughout. Furthermore, various elements and areas in the drawings are schematically drawn. Therefore, the present invention is not limited by the relative sizes or spacings depicted in the accompanying drawings.

[0027] While terms like "first" and "second" may be used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component could be referred to as a "second component," and vice versa, without departing from the scope of the present invention.

[0028] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the inventive concept. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the expressions "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, operations, components, parts, or combinations thereof.

[0029] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Furthermore, it is to be understood that commonly used terms, such as those defined in dictionaries, should be interpreted to have a meaning consistent with their meaning within the relevant technical context, and should not be interpreted in an overly formal sense unless explicitly defined herein.

[0030] In some embodiments, where implementations are otherwise feasible, specific process sequences may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0031] In the accompanying drawings, variations in the shapes depicted may be expected, for example, depending on manufacturing techniques and / or tolerances. Therefore, embodiments of the present invention should not be construed as being limited to the specific shapes of the regions depicted herein, but should include, for example, changes in shapes resulting from the manufacturing process. All terms "and / or" used herein include each and every combination of one or more of the mentioned components. In addition, the term "substrate" used herein may mean the substrate itself, or a laminated structure including the substrate and a predetermined layer or film formed on the surface thereof. In addition, the "surface of the substrate" in this specification may mean the exposed surface of the substrate itself, or the outer surface of a predetermined layer or film formed on the substrate.

[0032]

[0033] Figure 1 is a schematic diagram showing a pouch case manufacturing device (1) according to one embodiment of the present invention.

[0034] Referring to FIG. 1, the pouch case manufacturing device (1) includes a supply unit (200) that supplies a pouch film (100) and a forming unit (600) that forms the pouch film. In some embodiments, the pouch case manufacturing device (1) may further include a cutting unit (300) that cuts the pouch film (100) into a desired size and a foreign matter removal unit (400) that suctions or removes foreign matters that may be generated when cutting the pouch film (100). In some embodiments, the pouch case manufacturing device (1) may further place the cutting unit (300) and the foreign matter removal unit (400) after the forming unit (600).

[0035] The above pouch film (100) may include an outer covering layer (111) forming the outermost layer, a metal barrier layer (112) that prevents penetration of a material, and an inner sealant layer (113) for sealing.

[0036] The outer covering layer (111) serves to protect the battery from the outside, and therefore requires excellent tensile strength and weather resistance relative to its thickness. In some embodiments, the outer covering layer (111) may include a polymer such as a stretched nylon film or PET.

[0037] The metal barrier layer (112) can prevent air, moisture, etc. from entering the battery. The material used for the metal barrier layer (112) is not particularly limited as long as it has excellent formability and ductility. For example, the metal barrier layer (112) can be made of aluminum or an aluminum alloy.

[0038] The inner sealant layer (113) may provide sealing properties by being thermally bonded to each other by heat and pressure applied while the electrode assembly is housed in the pouch case. In some embodiments, the inner sealant layer (113) may include a non-stretched polypropylene film (CPP). In some embodiments, an adhesive layer may be added between the outer covering layer (111) and the metal barrier layer (112) and / or between the metal barrier layer (112) and the inner sealant layer (113).

[0039] The above supply unit (200) serves to supply a pouch film (100) to a pouch case manufacturing device (1). The supply unit (200) serves to supply the pouch film (100) so that it can be easily formed, and does not necessarily have to have the form illustrated in FIG. 1. The supply unit (200) may be configured in a roll shape or a rail shape. The supply speed, supply direction, and whether or not to supply the pouch film (100) can be controlled by a control device connected to the supply unit (200).

[0040] The forming device (600) forms the pouch film (100) to create a pouch case (10) including a pouch cup portion (110).

[0041] FIG. 2 is a perspective view schematically showing a molding device (600) according to one embodiment of the present invention.

[0042] Referring to FIGS. 1 and 2, the forming device (600) includes a fixing member (610) including a die plate (612) and a stripper (614).

[0043] The die plate (612) is formed in a flat shape so that the pouch film (100) is seated on the upper portion, and may include a cup portion forming hole that penetrates the upper and lower surfaces. That is, when the pouch film (100) is seated on the upper portion, the pouch cup portion (110) is formed by the punch portions, which will be described later, passing through the cup portion forming hole. Accordingly, the die plate (612) serves to support or fix the pouch film (100) from below. Meanwhile, the die plate (612) is formed in a flat shape so that a uniform surface pressure is applied to the pouch film (100) seated on the die plate (612), thereby supporting or fixing the pouch film.

[0044] The stripper (614) can pressurize and fix the pouch film (100) on top of the die plate (612). The stripper (614) can include a punch hole that penetrates the upper and lower surfaces at a position corresponding to the cup portion forming hole. That is, the pouch film (100) can be supported by the die plate (612) from the bottom and pressurized and fixed by the stripper (614) from the top. Meanwhile, the pouch film (100) is not necessarily limited to being placed on top of the die plate (612) and the stripper (614) pressurizing and fixing the pouch film (100) on top of the die plate (612). Conversely, the pouch film (100) can be placed on top of the stripper (614) and the die plate (612) can pressurize and fix the pouch film (100) on top of the stripper (614).

[0045] The above molding device (600) may further include an upper plate (694) and a lower plate (692). The upper plate (694) may be provided on the upper side of the stripper (614), and the lower plate (692) may be provided on the lower side of the die plate (612). At this time, the upper plate (694) and the lower plate (692) may be coupled to each other by a coupling member (696) having a length in the vertical direction from the edge. That is, the upper plate (694) is provided on the upper side of the molding device (600), and a stripper back plate (684) configuration described later may be coupled and fixed thereto. The lower plate (692) may be provided on the lower side of the molding device (600) to support other parts of the molding device (600) from the lower side.

[0046] In some embodiments, the forming apparatus (600) may further include a stripper back plate (684) and a die back plate (682). The stripper back plate (684) is provided between the stripper (614) and the upper plate (694) and may fix the stripper (614). The die back plate (682) is provided between the lower plate (692) and the die plate (612) and may support the die plate (612) from below. In this way, the stripper (614) and die plate (612) directly contact the pouch film (100) and serve to pressurize the pouch film (100), and the stripper back plate (684) and die back plate (682) are respectively provided on the upper and lower portions of the stripper (614) and die plate (612) described above, so that the stripper (614) and die plate (612) can be stably fixed to the forming device (600).

[0047]

[0048] FIGS. 3 to 9 are schematic diagrams showing a method for manufacturing a pouch case according to one embodiment of the present invention, and are conceptual diagrams showing the relative movement of major parts based on a cross-section taken along line III-III' of the forming device (600) of FIG. 2.

[0049] Referring to FIG. 3, the forming device (600) may be configured to form a pouch film (100). The pouch film (100) may be a laminate sheet having a predetermined thickness and formability. In some embodiments, the pouch film (100) may include a laminate sheet in which a pair of resin layers and a metal barrier layer are laminated between the pair of resin layers.

[0050] The above pouch film (100) can be fixed between the die plate (612) of the fixing part (610) and the stripper (614).

[0051] A punch portion (620) may be arranged on one surface of the pouch film (100). The punch portion (620) may be arranged at a position corresponding to a cup portion to be formed on the pouch film (100). In addition, the outer edge of the punch portion (620) may have a shape corresponding to the outer edge of the cup portion to be formed on the pouch film (100). Here, the 'outer edge' of a component refers to an outline when the component is viewed in the first direction (the Z-axis direction of FIG. 3).

[0052] A stripper (614) may be provided on the side of the punch portion (620). A first opening (614o) through which the punch portion (620) can pass may be provided in the center of the stripper (614). A predetermined gap may exist between the side wall of the punch portion (620) and the side wall of the first opening (614o).

[0053] The stripper (614) may be disposed on one side of the pouch film (100). In some embodiments, the punch portion (620) and the stripper (614) may be disposed on one side of the pouch film (100). That is, the punch portion (620) and the stripper (614) may be disposed on the same side of the pouch film (100).

[0054] The above die plate (612) may be placed on the other side of the pouch film (100) and may include a first die portion (6121) and a second die portion (6122).

[0055] The first die portion (6121) may be positioned to face the stripper (614) with the pouch film (100) interposed therebetween. The first die portion (6121) may be provided at a position corresponding to the stripper (614) so ​​as to cooperate with the stripper (614) to hold the pouch film (100).

[0056] In some embodiments, the first die portion (6121) may have a second opening (612o) through which the punch portion (620) may pass. In some embodiments, the shape of the second opening (612o) may correspond to the shape of the first opening (614o). The shape or size of the second opening (612o) may not necessarily be identical to the shape or size of the first opening (614o). However, the second opening (612o) may have a similar shape and a similar size to the first opening (614o).

[0057] The second die portion (6122) may be adjacent to the first die portion (6121). In some embodiments, the second die portion (6122) may be remote from the stripper (614) and adjacent to the first die portion (6121). That is, the second die portion (6122) may be spaced apart from the stripper (614) with the first die portion (6121) interposed therebetween. In some embodiments, the second die portion (6122) may include a plurality of blocks, which will be described in more detail below.

[0058] The second die portion (6122) may surround a space (612v) through which the punch portion (620) can at least partially pass. When the punch portion (620) enters the space (612v), the second die portion (6122) may be configured to cooperate with the punch portion (620) to hold the pouch film (100).

[0059] The above forming device (600) may further include a control unit (650). The control unit (650) may be configured to control the operations of the punch unit (620), the stripper (614), the first die unit (6121), and the second die unit (6122). A cup unit may be formed in the pouch film (100) under the control of the control unit (650). Hereinafter, a process of forming a cup unit in the pouch film (100) by operating the punch unit (620), the stripper (614), the first die unit (6121), and the second die unit (6122) under the control of the control unit (650) will be described.

[0060] First, in order to clamp the pouch film (100), the stripper (614) and the first die part (6121) can approach each other. The first die part (6121) can be arranged in a first direction with the stripper (614), and the first die part (6121) and / or the stripper (614) can move in the first direction with the pouch film (100) therebetween to clamp the pouch film (100). In some embodiments, when the first die part (6121) moves, the second die (6122) can also move translationally together. In some embodiments, when the first die part (6121) moves, the second die (6122) can be stationary.

[0061]

[0062] Referring to FIG. 4, the control unit (650) may be configured to pre-punch the pouch film (100) by the relative movement of the punch unit (620) and the stripper (614) while the stripper (614) and the first die unit (6121) fix the pouch film (100).

[0063] That is, while the stripper (614) and the first die portion (6121) fix the pouch film (100), at least one of the punch portion (620) and the stripper (614) moves in the first direction (Z-axis direction) to perform preliminary punching of the pouch film (100). By the preliminary punching, a preliminary cup portion (PC) can be formed in the pouch film (100).

[0064] In some embodiments, the spare cup portion (PC) may be formed by lowering the punch portion (620) while the stripper (614) and the first die portion (6121) are stationary. In some other embodiments, the spare cup portion (PC) may be formed by raising the stripper (614) and the first die portion (6121) while the punch portion (620) is stationary. In some other embodiments, the spare cup portion (PC) may be formed by raising the stripper (614) and the first die portion (6121) and lowering the punch portion (620).

[0065] When the above-mentioned preliminary cup portion (PC) is formed, the metal barrier layer of the pouch film (100) may be stretched. However, the metal barrier layer is not stretched uniformly. The metal barrier layer of the portion of the pouch film (100) sandwiched between the stripper (614) and the first die portion (6121) may not be substantially stretched when the above-mentioned preliminary cup portion (PC) is formed. The portion that is not sandwiched between the stripper (614) and the first die portion (6121) may also be stretched unevenly. In particular, the thickness of the metal barrier layer at the corner portion or edge portion of the preliminary cup portion (PC) may become relatively thinner due to stretching.

[0066]

[0067] Referring to FIG. 5, the control unit (650) may be configured to move the second die unit (6122) in a second direction (e.g., X-axis direction) so that a portion of the pre-punched pouch film (100) is sandwiched between the punch unit (620) and the second die unit (6122). The second direction may be a direction perpendicular to the first direction.

[0068] The second die portion (6122) can be moved toward the punch portion (620) to clamp the pouch film (100) together with the punch portion (620). That is, the punch portion (620) and the second die portion (6122) can cooperate to clamp a portion of the spare cup portion (PC). In some embodiments, the punch portion (620) and the second die portion (6122) can cooperate to clamp a portion of the side wall of the spare cup portion (PC).

[0069] Figures 6a and 6b are schematic diagrams schematically showing the positional relationship between the punch section (620) and the second die section (6122).

[0070] Referring to FIG. 6A, the second die portion (6122) may be positioned to face the long side and the short side of the punch portion (620). The second die portion (6122) facing the two long sides of the punch portion (620) may move toward the punch portion (620) along the X-axis to fix the pouch film (100). In addition, the second die portion (6122) facing the two short sides of the punch portion (620) may move toward the punch portion (620) along the Y-axis to fix the pouch film (100).

[0071] The second die portion (6122) cooperates with the long sides and short sides of the punch portion (620) to fix the pouch film (100), thereby more faithfully fixing the corner portion of the cup portion. Furthermore, when the metal barrier layer of the pouch film (100) is additionally stretched, stretching of the metal barrier layer at the corner portion can be more effectively suppressed.

[0072] Referring to FIG. 6B, the second die portion (6122) may be positioned to face the four corner portions of the punch portion (620). As the second die portion (6122) corresponding to each corner portion advances toward the corner portion of the punch portion (620), the pouch film (100) may be fixed. The inner wall surface of the second die portion (6122) may have a shape and dimension corresponding to the outer wall surface of the corner portion of the punch portion (620) so as to be suitable for holding the pouch film (100).

[0073] The second die portion (6122) can advance toward the corner portion of the punch portion (620) on the XY plane. That is, it can move in an oblique direction that is a composite of the X-axis direction and the Y-axis direction of FIG. 6B, and this direction can be defined here as the second direction for each second die portion (6122).

[0074] In some embodiments, a component in the first direction (Z-axis direction) may be partially added when the second die portion (6122) moves toward the punch portion (620).

[0075] The second die portion (6122) cooperates with the corner portions of the punch portion (620) to secure the pouch film (100), thereby more faithfully securing the corner portion of the cup portion. Furthermore, when the metal barrier layer of the pouch film (100) is additionally stretched, stretching of the metal barrier layer at the corner portion can be more effectively suppressed.

[0076] In Fig. 6a, the second die portion (6122) is exemplified as being arranged to face the long side and short side of the punch portion (620), and in Fig. 6b, the second die portion (6122) is exemplified as being arranged to face the corner portion of the punch portion (620), but a combination of these is also possible. That is, some of the plurality of second die portions (6122) may be arranged to face the long side and short side of the punch portion (620), and other some may be arranged to face the corner portion of the punch portion (620).

[0077]

[0078] Referring to FIG. 7, in order to form a main cup portion (MC) on the pouch film (100), the control unit may be configured to move the stripper (614) and the first die portion (6121) in a first direction (Z-axis direction) relative to the punch portion (620). At this time, the punch portion (620) and the second die portion (6122) may maintain a state in which the pouch film (100) is partially sandwiched. In addition, the stripper (614) and the first die portion (6121) may also maintain a state in which the pouch film (100) is partially sandwiched. During the formation of the main cup portion (MC), the stripper (614) and the first die portion (6121) may move away from the second die portion (6122).

[0079] In some embodiments, the stripper (614) and the first die portion (6121) can rise in the first direction while the punch portion (620) and the second die portion (6122) are stationary. In some other embodiments, the punch portion (620) and the second die portion (6122) can rise in the first direction while the stripper (614) and the first die portion (6121) are stationary. In some other embodiments, the punch portion (620) and the second die portion (6122) can descend in the first direction while the stripper (614) and the first die portion (6121) are rising in the first direction.

[0080] As described above, the punch portion (620) and the second die portion (6122) partially pinch the side wall of the preliminary cup portion (PC) (see FIG. 5). Therefore, even while the main cup portion (MC) is being formed, the pouch film (100) may not be substantially stretched in the portion of the pouch film (100) pinched by the punch portion (620) and the second die portion (6122). In addition, while the main cup portion (MC) is being formed, the metal barrier layer of the pouch film (100) may be suppressed from being stretched at the edge portion or corner portion of the main cup portion (MC).

[0081] In addition, since the stripper (614) and the first die portion (6121) rise in the first direction while the side wall of the spare cup portion (PC) is held and fixed by the punch portion (620) and the second die portion (6122), the metal barrier layer can be stretched mainly in the portion indicated by E in FIG. 7. As a result, in the forming process of the pouch film (100), the metal barrier layer can be stretched evenly throughout, and stress can be prevented from being concentrated in a specific portion of the metal barrier layer and damaging the pouch film (100).

[0082] In some embodiments, the gap between the first die portion (6121) and the punch portion (620) while forming the main cup portion (MC) may be greater than the gap between the second die portion (6122) and the punch portion (620).

[0083]

[0084] Referring to FIG. 8, after the main cup portion (MC) is formed, the stripper (614) can be separated from the first die portion (6121) to release the pouch film (100). To release the pouch film (100), the stripper (614) may rise, the first die portion (6121) may descend, or the stripper (614) may rise and the first die portion (6121) may descend.

[0085] Additionally, the second die portion (6122) may be spaced apart from the punch portion (620) to release the pouch film (100). In some embodiments, the second die portion (6122) may move in the opposite direction to the direction in which it moved toward the punch portion (620) to clamp the pouch film (100) and release the pouch film (100). That is, the second die portion (6122) may move in the second direction to be spaced apart from the pouch film (100).

[0086] When the second die portion (6122) moves in the second direction and separates from the pouch film (100), the punch portion (620) can be raised in the first direction to release the pouch film (100).

[0087]

[0088] Referring to Fig. 9, two released pouch films (100a, 100b) can be overlapped to obtain a pouch case (10). An electrode assembly (700) and an electrolyte can be accommodated in the main cup portions (MC) defined inside the pouch case (10).

[0089] In some embodiments, when two main cup portions are created within one pouch film (100), a pouch case (10) can be obtained by folding the portion between the two main cup portions.

[0090] To accommodate high-capacity electrode assemblies, the cup portion of the pouch must be formed deeply. However, forming the cup portion of the pouch deeply can cause the metal barrier layer of the pouch film to be excessively stretched and damaged at the corners and / or edges. According to the device and method of the present invention, as described above, the main cup portion is formed by further stretching while the side walls of the spare cup portion are fixed, thereby preventing damage to the corners and edges of the main cup portion.

[0091]

[0092] While the embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, modifications to future embodiments of the present invention will not depart from the scope of the invention.

[0093]

[0094] [Explanation of symbols]

[0095] 1: Pouch case manufacturing device

[0096] 10: Pouch Case

[0097] 100: Pouch film

[0098] 111: Outer covering layer

[0099] 112: Metal barrier layer

[0100] 113: Inner sealant layer

[0101] 200: Supply Department

[0102] 300: Cutting section

[0103] 400: Foreign matter removal section

[0104] 600: Molding device

[0105] 610: Fixed part

[0106] 612: Die plate

[0107] 614: Stripper

[0108] 620: Punch Department

[0109] 650: Control Unit

[0110] 682: Die backplate

[0111] 684: Stripper Backplate

[0112] 692: Lower plate

[0113] 694: Top plate

[0114] 696: Joining member

[0115] 700: Electrode assembly

[0116] 6121: 1st Daibu

[0117] 6122: 2nd Daibu

Claims

1. A punch portion provided on one side of the pouch film; A stripper provided on the one side of the pouch film in the lateral direction of the punch portion; A first die portion provided on the other side of the pouch film and provided at a position corresponding to the stripper; and A second die section adjacent to the first die section and remote from the stripper; Including, A pouch case manufacturing device configured such that the second die portion cooperates with the punch portion to clamp the pouch film.

2. In paragraph 1, A pouch case manufacturing device further comprising a control unit configured to control the operations of the punch unit, the stripper, the first die unit, and the second die unit.

3. In paragraph 2, A pouch case manufacturing device characterized in that the control unit is configured to pre-punch the pouch film by the relative movement of the punch unit and the stripper while the stripper and the first die unit fix the pouch film.

4. In paragraph 3, A pouch case manufacturing device wherein the second die portion is configured to be movable in a second direction perpendicular to the first direction in which the stripper and the first die portion are arranged.

5. In paragraph 3, A pouch case manufacturing device characterized in that the control unit is configured to move the second die unit toward the punch unit so that the punch unit and the second die unit pinch a portion of the pre-punched pouch film.

6. In paragraph 5, A pouch case manufacturing device characterized in that, in order to form a main cup portion on the pouch film, the control portion is configured to move the stripper in a first direction relative to the punch portion while a portion of the pouch film is held by the punch portion and the second die portion.

7. In paragraph 6, A pouch case manufacturing device characterized in that when the stripper moves in the first direction relative to the punch portion, the control portion is configured so that the second die portion and the punch portion do not move relatively.

8. In paragraph 7, When the above stripper moves in the first direction relative to the punch section, A pouch case manufacturing device characterized in that the pouch film is configured so that stretching of the pouch film substantially does not occur in the portion of the pouch film sandwiched between the second die portion and the punch portion.

9. In paragraph 5, After the main cup portion is formed, the stripper is spaced apart in the first direction with respect to the first die portion to release the pouch film, A pouch case manufacturing device characterized in that the second die portion is configured to be spaced apart in a second direction with respect to the punch portion.

10. A step of sandwiching a pouch film between a stripper surrounding a punch portion and a first die portion arranged at the bottom of the stripper; A step of relatively moving the stripper and the first die portion, which hold the pouch film, in a first direction with respect to the punch portion, in order to form a spare cup portion; A step of moving the second die portion in a second direction perpendicular to the first direction to sandwich at least a portion of the spare cup portion between the second die portion and the punch portion arranged below the first die portion; and A step of moving the first die portion and the stripper relatively to the punch portion to form a main cup portion; A method for manufacturing a pouch case including:

11. In paragraph 10, A method for manufacturing a pouch case, characterized in that, in the step of moving the first die part and the stripper relative to the punch part to form the main cup part, a part of the spare cup part is maintained sandwiched between the second die part and the punch part.

12. In paragraph 11, A method for manufacturing a pouch case, characterized in that in the step of moving the first die part and the stripper relative to the punch part to form the main cup part, the second die part and the punch part pinch the side walls of the spare cup part.

13. In paragraph 11, A method for manufacturing a pouch case, characterized in that in the step of moving the first die part and the stripper relative to the punch part to form the main cup part, the second die part and the punch part pinch the corners of the spare cup part.

14. In paragraph 10, A method for manufacturing a pouch case, characterized in that in the step of moving the first die portion and the stripper relative to the punch portion to form the main cup portion, the first die portion and the stripper are moved in the first direction relative to the punch portion.

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