Apparatus and method for manufacturing pouch for secondary battery

Abstract

The present invention relates to an apparatus for manufacturing a pouch for a secondary battery, the pouch including a pouch body and a sealing portion. The apparatus comprises: a pressing part provided to selectively press the sealing portion of the pouch for the secondary battery along the vertical direction, perpendicular to the horizontal direction, so that the sealing portion is bent in the vertical direction, and to selectively press the sealing portion along the horizontal direction so that the bent sealing portion moves toward the pouch body; and an adhesive tape supply part that supplies adhesive tape to a target bonding surface, facing the side surface of the pouch body, of the sealing portion, wherein the adhesive tape is bonded between the target bonding surface and the side surface of the pouch body as the sealing portion is pressed in the horizontal direction by the pressing part. Accordingly, the apparatus can achieve the advantageous effect of simplifying the structure and manufacturing process and improving space utilization and design freedom.

Description

Device and method for manufacturing pouches for secondary batteries

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0159339 filed on November 11, 2024, and all contents disclosed in the document of said Korean Patent Application are incorporated herein as part of this specification.

[0003] Technology field

[0004] The present invention relates to an apparatus and method for manufacturing a pouch for a secondary battery, and more specifically, to an apparatus and method for manufacturing a pouch for a secondary battery that can simplify the structure and supply process and improve process efficiency and productivity.

[0005] Generally, types of secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and lithium-ion polymer batteries. These secondary batteries are used not only in small products such as digital cameras, P-DVDs, MP3 players, mobile phones, PDAs, portable game devices, power tools, and E-bikes, but also in large products requiring high output such as electric vehicles and hybrid vehicles, as well as in power storage devices and backup power storage devices that store surplus generated power or renewable energy.

[0006] To manufacture a secondary battery, first, an electrode active material slurry is applied to a positive electrode current collector and a negative electrode current collector to produce a positive electrode and a negative electrode, and then an electrode assembly of a predetermined shape is formed by stacking them on both sides of a separator. Then, the electrode assembly is placed in a battery case, an electrolyte is injected, and then the case is sealed.

[0007] Secondary batteries can be classified into pouch type and can type, etc., depending on the material of the case that accommodates the electrode assembly.

[0008] Among these, the pouch type is configured to accommodate an electrode assembly in a pouch made of a flexible polymer material.

[0009] The electrode assembly is formed such that the positive and negative electrodes are wound or stacked in one direction with a separator in between, and the pouch can be provided by bonding a lower sheet and an upper sheet that define a receiving space to accommodate the electrode assembly inside in a cooperative manner.

[0010] Meanwhile, the pouch can be manufactured by joining the side portions (edges) of the lower sheet and the upper sheet, and as the side portions of the lower sheet and the upper sheet come into contact, a sealing portion is formed on the side (edge ​​side) of the pouch.

[0011] However, conventionally, since the sealing portion is formed on the side of the pouch, additional space must be secured to place the sealing portion, which reduces space utilization and design freedom, and makes it difficult to maximize the volumetric efficiency or volumetric energy density of the secondary battery.

[0012] Accordingly, a method has been proposed in which the sealing portion of the pouch is folded to minimize the dead volume occupied by the sealing portion of the pouch, and then the folded sealing portion is fixed to the pouch using an adhesive (e.g., double-sided tape).

[0013] However, conventionally, as the folding and bonding processes of the sealing portion of the pouch are performed individually by separate folding and bonding devices, there are problems such as increased complexity in the structure and manufacturing process, reduced space utilization and design freedom, as well as decreased process efficiency and productivity.

[0014] Accordingly, various studies have recently been conducted to simplify the folding and bonding processes of the sealing portion of pouches and to improve space utilization and design freedom; however, these efforts are still insufficient, and further development is required.

[0015] The embodiments of the present invention aim to provide a secondary battery pouch manufacturing apparatus and a manufacturing method that can simplify the structure and manufacturing process and improve space utilization and design freedom.

[0016] In particular, the embodiment of the present invention aims to simplify the structure of a manufacturing apparatus for performing folding and bonding processes for the sealing portion of a pouch, and to improve space utilization and design freedom.

[0017] Above all, the embodiment of the present invention aims to enable the bonding process of a sealing portion to be performed using a pressure member that folds (bends) the sealing portion of a pouch, without individually providing a separate folding device and a bonding device for folding and bonding the sealing portion.

[0018] In addition, the embodiments of the present invention aim to reduce the amount of adhesive tape used and minimize the misassembly of the adhesive tape.

[0019] In addition, the embodiments of the present invention aim to standardize the size and shape of the pouch and to reduce the manufacturing time of the pouch.

[0020] In addition, the embodiments of the present invention aim to improve the folding and adhesive uniformity of the sealing portion, and to improve stability and reliability.

[0021] The problems intended to be solved in the embodiments are not limited thereto, and may also include objectives or effects that can be identified from the means of solving the problems or the forms of implementation described below.

[0022] According to a preferred embodiment of the present invention for achieving the aforementioned objectives of the present invention, a secondary battery pouch manufacturing apparatus for manufacturing a secondary battery pouch comprising a pouch body and a sealing portion comprises: a pressure portion configured to selectively press the sealing portion along a vertical direction so that the sealing portion of the secondary battery pouch is bent toward a vertical direction perpendicular to the horizontal direction, and to selectively press the sealing portion along a horizontal direction so that the bent sealing portion moves toward the pouch body; and an adhesive tape supply unit for supplying an adhesive tape to a target adhesive surface of the sealing portion facing the side of the pouch body, wherein the adhesive tape is adhered between the target adhesive surface and the side of the pouch body as the sealing portion is pressed in the horizontal direction by the pressure portion.

[0023] This is intended to simplify the structure and supply process of the secondary battery pouch manufacturing device, and to improve space utilization and design freedom.

[0024] In other words, conventionally, the folding and bonding processes of the pouch's sealing portion are performed individually by separate folding and bonding devices, respectively. This results in a complex structure and manufacturing process, reduced space utilization and design freedom, as well as decreased process efficiency and productivity.

[0025] In addition, conventionally, in order to secure the folded sealing portion to the pouch, adhesive tape must be applied to cover the entire sealing portion, which not only increases the amount of adhesive tape used but also presents the problem of being difficult to simplify the process of applying the adhesive tape.

[0026] However, the embodiment of the present invention simplifies the structure of the manufacturing device for performing the folding and bonding processes for the sealing part and improves space utilization and design freedom by causing the sealing part to be bonded to the pouch body by means of a pressure part that folds (folds) the sealing part with respect to the pouch body.

[0027] Above all, the embodiment of the present invention allows the bonding process of the sealing part (a process of supplying adhesive tape to the sealing part and bonding the adhesive tape to the side of the pouch body) to be performed together using a pressure part that folds (folds) the sealing part of the pouch without individually providing separate folding and bonding devices for folding and bonding the sealing part, thereby simplifying the structure and manufacturing process of the manufacturing device and obtaining advantageous effects such as improved space utilization and design freedom.

[0028] In addition, since the adhesive tape only needs to be supplied to the target adhesive surface of the sealing part to fix the folded sealing part to the pouch, the amount of adhesive tape used can be reduced, and since it is possible to attach the adhesive tape with only a relatively simple movement of the pressing part (linear movement along the horizontal direction of the pressing part), the structure and manufacturing process can be simplified, and advantageous effects such as improved productivity and production efficiency can be obtained.

[0029] The pressurizing part can be provided with various structures capable of pressing the sealing part along the vertical direction while also pressing the sealing part along the horizontal direction.

[0030] According to a preferred embodiment of the present invention, the pressurizing member may include a pressurizing member provided to be selectively linearly movable along a vertical direction and a horizontal direction.

[0031] According to a preferred embodiment of the present invention, the pressing member may be configured to first press the sealing member by moving linearly along a horizontal direction so that the target adhesive surface contacts the first adhesive surface of the adhesive tape while the sealing member is in a bent state, and then secondarily press the sealing member by moving linearly along a horizontal direction so that the second adhesive surface of the adhesive tape is adhered to the side of the pouch body.

[0032] According to a preferred embodiment of the present invention, the sealing portion may include a first sealing portion protruding from the pouch body along a horizontal direction, and a second sealing portion connected to the end of the first sealing portion in a folded manner and defining a target adhesive surface, and when a pressure member moves in a vertical direction, the first sealing portion is folded by the pressure member, and the target adhesive surface of the second sealing portion may be positioned to face the side of the pouch body.

[0033] The adhesive tape supply unit can be provided in various structures capable of supplying adhesive tape to the target adhesive surface of the sealing part.

[0034] According to a preferred embodiment of the present invention, the adhesive tape supply unit may include a supply roll for supplying an adhesive tape material comprising an adhesive tape, a first release sheet laminated on a first adhesive surface, and a second release sheet laminated on a second adhesive surface; a material transfer unit for selectively transferring the adhesive tape material so that the adhesive tape material is selectively positioned between a target adhesive surface and a side of a pouch body; a first recovery roll for recovering the first release sheet from the adhesive tape material; and a second recovery roll for recovering the second release sheet from the adhesive tape material.

[0035] According to a preferred embodiment of the present invention, a plurality of adhesive tapes may be provided spaced apart along the length direction of the adhesive tape material by being cut into predetermined units.

[0036] In this way, the embodiment of the present invention includes a plurality of adhesive tapes in a single adhesive tape material, so that in order to supply adhesive tapes to the sealing parts of different pouches, it is not necessary to replace the adhesive tape material for each sealing part of the pouch individually, thereby simplifying the structure and manufacturing process and obtaining the advantageous effect of improving productivity and production efficiency.

[0037] According to a preferred embodiment of the present invention, the adhesive tape material can be provided by being wound in a roll form onto a supply roll.

[0038] In this way, the embodiment of the present invention can obtain the advantageous effect of minimizing the equipment and space for supplying the adhesive tape material by providing the adhesive tape material wound in a roll form.

[0039] The fabric conveying unit can be provided with various structures capable of selectively conveying adhesive tape fabric.

[0040] According to a preferred embodiment of the present invention, the fabric conveying unit may include a lifting member provided to be selectively raised and lowered from a first position positioned above the target adhesive surface to a second position positioned between the target adhesive surface and the side of the pouch body, and when the lifting member lowers to the second position, the adhesive tape fabric is pressed by the lifting member and conveyed between the target adhesive surface and the side of the pouch body, and the adhesive tape may be positioned to face the target adhesive surface.

[0041] According to a preferred embodiment of the present invention, the lifting member can perform the role of supplying adhesive tape (transporting adhesive tape material) and simultaneously perform the role of supporting the folding of the sealing portion by the pressing member.

[0042] That is, according to a preferred embodiment of the present invention, the pressurizing member may be configured to move in a vertical direction and bend the sealing portion toward the vertical direction while the lifting member is lowered to the second position.

[0043] In this way, the embodiment of the present invention can obtain the advantageous effect of accurately folding the sealing part at an intended angle by causing the pressing member to move in a vertical direction and press the sealing part while the lifting member is lowered to the second position, that is, while the lower end of the lifting member contacts the upper surface of the sealing part and supports the upper surface of the sealing part.

[0044] According to a preferred embodiment of the present invention, the lifting member can perform the role of conveying the adhesive tape material and simultaneously perform the role of stably transferring the adhesive tape to the target adhesive surface of the sealing part.

[0045] That is, according to a preferred embodiment of the present invention, the pressing member may be configured to first press the sealing portion to transfer the adhesive tape from the adhesive tape material to the target adhesive surface when the lifting member is lowered to a second position, and after the lifting member is raised to a first position, the pressing member to second press the sealing portion to adhere the adhesive tape to the side of the pouch body.

[0046] In this way, the embodiment of the present invention allows the sealing portion to come into contact with the adhesive tape by a pressing force from a pressing member while the lifting member is lowered to a second position, that is, while the rear of the adhesive tape facing the sealing portion is supported by the lifting member. By doing so, the phenomenon in which the adhesive tape is not adhered to the sealing portion and is pushed backward (in the direction approaching the side of the pouch body) by the sealing portion during the process of transferring the adhesive tape to the sealing portion can be suppressed, thereby obtaining the advantageous effect of transferring the adhesive tape to the sealing portion more stably.

[0047] According to a preferred embodiment of the present invention, a pouch manufacturing device for a secondary battery may include a support member that faces a lifting member and supports the bottom surface of a sealing portion.

[0048] In this way, the embodiment of the present invention allows the bottom surface of the sealing part to be supported via a support member in correspondence with the lifting member, thereby suppressing sagging and deformation of the sealing part caused by the lifting member when the lifting member descends to a second position to contact the upper surface of the sealing part. Consequently, the sealing part can be accurately bent into a predetermined position, and an advantageous effect can be obtained to accurately transfer the adhesive tape to the target adhesive surface of the sealing part.

[0049] According to another preferred aspect of the present invention, a method for manufacturing a pouch for a secondary battery comprising a pouch body that accommodates an electrode assembly inside and a sealing portion protruding along a horizontal direction on the side of the pouch body comprises the steps of: vertically pressing the sealing portion along a vertical direction using a pressure member provided to be selectively linearly movable along a vertical direction and a horizontal direction so that the sealing portion is bent toward a vertical direction orthogonal to the horizontal direction; supplying an adhesive tape to a target adhesive surface of the sealing portion facing the side of the pouch body; and horizontally pressing the sealing portion along a horizontal direction using a pressure member so that the bent sealing portion moves toward the pouch body, wherein the adhesive tape is adhered between the target adhesive surface and the side of the pouch body as the sealing portion is pressed in the horizontal direction.

[0050] As described above, according to an embodiment of the present invention, advantageous effects can be obtained by simplifying the structure and manufacturing process and improving space utilization and design freedom.

[0051] In particular, according to an embodiment of the present invention, the structure of a manufacturing device for performing folding and bonding processes for a sealing portion of a pouch can be simplified, and advantageous effects such as improved space utilization and design freedom can be obtained.

[0052] Above all, according to an embodiment of the present invention, it is possible to perform the bonding process of the sealing portion using a pressure member that folds (bends) the sealing portion of the pouch without individually providing a separate folding device and a bonding device for folding and bonding the sealing portion.

[0053] In addition, according to an embodiment of the present invention, advantageous effects can be obtained in reducing the amount of adhesive tape used and minimizing the misassembly of the adhesive tape.

[0054] In addition, according to an embodiment of the present invention, the size and shape of the pouch can be standardized, and the manufacturing time of the pouch can be shortened, which is an advantageous effect.

[0055] In addition, according to an embodiment of the present invention, advantageous effects can be obtained to improve the folding and adhesive uniformity of the sealing portion and to improve stability and reliability.

[0056] FIG. 1 is a drawing for explaining a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0057] FIG. 2 is a drawing for explaining an adhesive tape material as a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0058] FIG. 3 is a drawing for explaining an adhesive tape supply unit as a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0059] FIG. 4 is a drawing illustrating the initial arrangement of a pressurizing unit and an adhesive tape supply unit in a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0060] FIG. 5 is a drawing illustrating the lowered state of a lifting member in a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0061] FIG. 6 is a diagram illustrating the folding process of a sealing portion of a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0062] FIG. 7 is a drawing illustrating a process for transferring an adhesive tape from an adhesive tape material to a sealing portion, in a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0063] FIG. 8 is a drawing illustrating the rising state of a lifting member in a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0064] FIG. 9 is a diagram illustrating the bonding process of an adhesive tape to a pouch body, according to an embodiment of the present invention, for a secondary battery pouch manufacturing apparatus.

[0065] FIG. 10 is a drawing for explaining a pouch for a secondary battery manufactured by a pouch manufacturing apparatus for a secondary battery according to an embodiment of the present invention.

[0066] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0067] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0068] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0069] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0070] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0071] In addition, terms such as first, second, A, B, (a), (b), etc. may be used when describing the components of the embodiments of the present invention.

[0072] These terms are intended merely to distinguish a component from other components and are not limited by the essence, order, sequence, etc. of the component.

[0073] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0074] Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0075] Example 1

[0076] Referring to FIGS. 1 to 10, the present invention relates to a secondary battery pouch manufacturing apparatus (10) for manufacturing a secondary battery pouch (20) comprising a pouch body (22) that accommodates an electrode assembly (30) inside, and a sealing portion (24) that protrudes along a horizontal direction (D1) on the side of the pouch body (22). The apparatus comprises a pressing portion (100) provided to selectively press the sealing portion (24) along the vertical direction (D2) so that the sealing portion (24) of the secondary battery pouch (20) is bent toward a vertical direction (D2) perpendicular to the horizontal direction (D1), and to selectively press the sealing portion (24) along the horizontal direction (D1) so that the bent sealing portion (24) moves toward the pouch body (22). The apparatus also comprises an adhesive tape (214) supplied to a target adhesive surface (24c) of the sealing portion (24) facing the side of the pouch body (22). It includes an adhesive tape (214) supply unit (200), and the adhesive tape (214) is bonded between the target adhesive surface (24c) and the side of the pouch body (22) as the sealing portion (24) is pressed in the horizontal direction (D1) by the pressurizing portion (100).

[0077] For reference, the secondary battery pouch manufacturing device (10) according to an embodiment of the present invention may be used to fold (bend) and bond the sealing portion (24) of the pouch (20), and the present invention is not limited or restricted by the type and structure of the pouch (20) used in the secondary battery pouch manufacturing device (10).

[0078] The pouch (20) may be provided in various structures including a pouch body (22) and a sealing portion (24), and the present invention is not limited or restricted by the structure and shape of the pouch (20).

[0079] The pouch body (22) accommodates the electrode assembly (30) inside and is provided to completely wrap around the perimeter of the electrode assembly (30).

[0080] The pouch body (22) may be provided in various structures capable of accommodating the electrode assembly (30) inside, and the present invention is not limited or restricted by the structure and shape of the pouch body (22).

[0081] For example, the pouch body (22) may be provided by joining a lower sheet (not shown) and an upper sheet (not shown) having a roughly rectangular shape, and a receiving space for accommodating an electrode assembly (30) may be defined between the lower sheet and the upper sheet.

[0082] In the embodiments of the present invention described above, the pouch body (22) is configured to have a roughly rectangular shape, but according to other embodiments of the present invention, it is also possible to configure the pouch body to have a circular or other shape.

[0083] In addition, the pouch body (22) may be configured with a structure including a metal layer, such as an aluminum thin film, to protect components such as an electrolyte injected into the interior of the pouch body (22), and to improve the electrochemical properties of the electrode assembly (30) and the electrolyte, as well as heat dissipation.

[0084] For reference, the electrode assembly (30) may include an electrode (not shown) and a separator (not shown) laminated to the electrode.

[0085] For example, the electrode may include a first electrode (e.g., a positive electrode) laminated on one side (e.g., an upper surface) of the separator, and a second electrode (e.g., a negative electrode) laminated on the other side (e.g., a lower surface) of the separator.

[0086] The first electrode (anode) and the second electrode (cathode) can be formed by applying a slurry, which is a mixture of an electrode active material, a binder, and a plasticizer, to the positive current collector and the negative current collector.

[0087] The positive current collector is not particularly limited as long as it is conductive without causing chemical changes in the battery. For example, as a positive current collector, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. may be used.

[0088] The negative electrode current collector is not particularly limited as long as it is conductive without causing chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. may be used as the negative electrode current collector. As an example, a copper thin film (e.g., electrolytic copper foil or pressure copper foil) may be used as the negative electrode current collector.

[0089] A separator is provided to separate the negative and positive electrodes and to provide a pathway for the movement of lithium ions; it can be used without any special restrictions as long as it is typically used as a separator in a lithium secondary battery.

[0090] As an example, as a separator, a porous polymer film made of a polyolefin-based polymer such as an ethylene homopolymer, a propylene homopolymer, an ethylene / butene copolymer, an ethylene / hexene copolymer, and an ethylene / methacrylate copolymer, or a laminated structure of two or more layers thereof may be used.

[0091] Alternatively, it is also possible to use a conventional porous nonwoven fabric as a separator, such as a nonwoven fabric made of high-melting-point glass fibers or polyethylene terephthalate fibers, or to use a coated separator containing ceramic components or polymer materials to ensure heat resistance or mechanical strength.

[0092] The sealing portion (24) can be formed by joining the side portions (edges) of the lower sheet and the upper sheet constituting the pouch body (22), and is provided to protrude along the horizontal direction (D1) (left and right direction based on FIG. 3) on the side of the pouch body (22).

[0093] For example, the sealing portion (24) may be formed along three or four sides of the pouch body (22). According to another embodiment of the present invention, it is also possible to configure the sealing portion to be formed along one or two sides of the pouch body.

[0094] The pressure member (100) is provided to apply pressure to the sealing member (24) so ​​that it is folded (bent) relative to the pouch body (22), and to apply pressure to the sealing member (24) in a direction approaching the side of the pouch body (22).

[0095] More specifically, the pressurizing part (100) is configured to selectively press the sealing part (24) along the vertical direction (D2) so that the sealing part (24) is folded (folded to form an 'L' shape) toward the vertical direction (D2) (up and down direction in FIG. 3) which is orthogonal to the horizontal direction (D1) (left and right direction in FIG. 3), and to selectively press the sealing part (24) along the horizontal direction (D1) so that the folded sealing part (24) moves toward the pouch body (22).

[0096] The pressurizing part (100) may be provided with various structures capable of pressing the sealing part (24) along the horizontal direction (D1) while pressing the sealing part (24) along the vertical direction (D2), and the present invention is not limited or restricted by the structure of the pressurizing part (100).

[0097] According to a preferred embodiment of the present invention, the pressurizing unit (100) may include a single pressurizing member (110) provided to be selectively linearly movable along a vertical direction (D2) and a horizontal direction (D1).

[0098] For example, the pressure member (110) may be configured to have a roughly square block shape (rectangular shape). According to another embodiment of the present invention, it is also possible to configure the pressure member to have a spherical shape or other shapes.

[0099] In an embodiment of the present invention, the statement that the pressurizing member (110) moves linearly along the vertical direction (D2) and the horizontal direction (D1) is defined as not only being able to move linearly along the vertical direction (D2) with respect to the pouch (20), but also being able to move linearly along the horizontal direction (D1) with respect to the pouch (20).

[0100] For reference, linear movement along the vertical direction (D2) and horizontal direction (D1) of the pressurizing part (100) can be implemented in various ways depending on the required conditions and design specifications.

[0101] For example, linear movement along the vertical direction (D2) and horizontal direction (D1) of the pressurizing part (100) can be implemented by a conventional linear motion system such as a motor, a solenoid, or a linear motor. According to another embodiment of the present invention, it is also possible to configure the pressurizing part to move linearly along the vertical and horizontal directions in response to the rotation of the lead screw.

[0102] The pressing member (110) moves linearly along the vertical direction (D2) (up and down direction) and presses the sealing part (24) arranged in the horizontal direction (D1), thereby folding the sealing part (24) so ​​that the sealing part (24) faces approximately the vertical direction (D2).

[0103] Additionally, the pressure member (110) can press the sealing portion (24), which is bent in the vertical direction (D2), in the horizontal direction (D1) (the direction approaching the pouch body (22)).

[0104] According to a preferred embodiment of the present invention, the pressing member (110) may be configured to first press the sealing member (24) by moving linearly along the horizontal direction (D1) so that the target adhesive surface (24c) contacts the first adhesive surface (214a) of the adhesive tape (214) while the sealing member (24) is in a bent state, and then to secondly press the sealing member (24) by moving linearly along the horizontal direction (D1) so that the second adhesive surface (214b) of the adhesive tape (214) is adhered to the side of the pouch body (22).

[0105] For reference, while the pressing member (110) is pressing the sealing part (24) for the first time, the supply state of the adhesive tape (214) (the state in which the adhesive tape (214) is placed between the sealing part (24) and the side of the pouch body (22)) can be supported by the lifting member (232) to be described later, and the second pressing of the sealing part (24) by the pressing member (110) can be performed after the lifting member (232) returns (rises) to the upper position (first position).

[0106] According to a preferred embodiment of the present invention, the sealing portion (24) may include a first sealing portion (24a) protruding from the pouch body (22) along the horizontal direction (D1), and a second sealing portion (24b) connected to the end of the first sealing portion (24a) in a folded manner and defining a target adhesive surface (24c). When the pressure member (110) moves in the vertical direction (D2), the first sealing portion (24a) is folded by the pressure member (110), and the target adhesive surface (24c) of the second sealing portion (24b) may be positioned to face the side of the pouch body (22).

[0107] Although the embodiments of the present invention described above and illustrated are explained as examples in which the sealing portion (24) is first folded to include the first sealing portion (24a) and the second sealing portion (24b), and then secondarily folded again via the pressure member (110), according to other embodiments of the present invention, it is also possible to configure the pressure member to fold the unfolded sealing portion (e.g., a sealing portion including only the first sealing portion) or to additionally fold the sealing portion that has been folded two or more times.

[0108] An adhesive tape (214) supply unit (200) is provided to supply adhesive tape (214) to the target adhesive surface (24c) of the sealing portion (24) facing the side of the pouch body (22).

[0109] The adhesive tape (214) supply unit (200) may be provided in various structures capable of supplying adhesive tape (214) to the target adhesive surface (24c) of the sealing part (24), and the present invention is not limited or restricted by the structure of the adhesive tape (214) supply unit (200).

[0110] According to a preferred embodiment of the present invention, the adhesive tape (214) supply unit (200) comprises: a supply roll (220) for supplying an adhesive tape material (210) comprising an adhesive tape (214), a first release sheet (212) laminated on a first adhesive surface (214a), and a second release sheet (216) laminated on a second adhesive surface (214b); a material transfer unit (230) for selectively transferring the adhesive tape material (210) so that the adhesive tape material (210) is selectively positioned between a target adhesive surface (24c) and a side of a pouch body (22); a first recovery roll (240) for recovering the first release sheet (212) from the adhesive tape material (210); and a second recovery roll (250) for recovering the second release sheet (216) from the adhesive tape material (210).

[0111] Referring to FIG. 2, the adhesive tape material (210) may include an adhesive tape (214), a first release sheet (212) laminated on the first adhesive surface (214a) of the adhesive tape (214) (e.g., the bottom surface based on FIG. 2), and a second release sheet (216) laminated on the second adhesive surface (214b) of the adhesive tape (214) (e.g., the top surface based on FIG. 2).

[0112] The adhesive tape (214) can be formed from various materials having adhesive strength on both sides, and the present invention is not limited or restricted by the material and characteristics of the adhesive tape (214). For example, the adhesive tape (214) can be formed from ordinary polyethylene foam, acrylic foam, PET, silicone, etc.

[0113] The first release sheet (212) may be made of paper or film that can be easily separated from the adhesive tape (214) while protecting the first adhesive surface (214a) of the adhesive tape (214). For example, the first release sheet (212) may be made of ordinary release paper, glyph paper, film release paper, etc.

[0114] The second release sheet (216) may be made of paper or film that can be easily separated from the adhesive tape (214) while protecting the second adhesive surface (214b) of the adhesive tape (214). For example, as the second release sheet (216), ordinary release paper, glyph paper, film release paper, etc. may be used.

[0115] According to a preferred embodiment of the present invention, the adhesive tape (214) may be cut into predetermined units (e.g., a length corresponding to the target adhesive surface (24c) of the sealing portion (24)) and provided in multiple units spaced apart along the length direction of the adhesive tape material (210).

[0116] For example, the first release sheet (212) and the second release sheet (216) may be provided in the form of a continuous sheet (strip) that is commonly laminated onto a plurality of adhesive tapes (214). Alternatively, it is also possible to configure the first release sheet (212) and the second release sheet (216), which are individually cut for each adhesive tape (214), to be laminated.

[0117] In this way, the embodiment of the present invention includes a plurality of adhesive tapes (214) in a single adhesive tape material (210), so that in order to supply adhesive tapes (214) to the sealing portions (24) of different pouches (20), the adhesive tape material (210) does not need to be replaced individually for each sealing portion (24) of the pouch (20), thereby simplifying the structure and manufacturing process and obtaining the advantageous effect of improving productivity and production efficiency.

[0118] The supply roll (220) can supply adhesive tape material (210) in various ways according to the required conditions and design specifications.

[0119] According to a preferred embodiment of the present invention, the adhesive tape material (210) may be provided by being wound in a roll form on a supply roll (220).

[0120] Thus, the embodiment of the present invention can obtain the advantageous effect of minimizing the equipment and space for supplying the adhesive tape material (210) by providing the adhesive tape material (210) by winding it into a roll shape. According to another embodiment of the present invention, it is also possible to supply the adhesive tape material in a straight line using a conventional conveyor, etc., without winding the adhesive tape material onto a supply roll.

[0121] The first recovery roll (240) is provided to recover the first release sheet (212) from the adhesive tape material (210) supplied from the supply roll (220).

[0122] The first recovery roll (240) may be provided with various structures capable of recovering the first release sheet (212), and the present invention is not limited or restricted by the structure and recovery method of the first recovery roll (240).

[0123] For example, the first recovery roll (240) may be provided adjacent to the lower part of the supply roll (220), and the first release sheet (212) separated from the adhesive tape material (210) may be recovered by winding it onto the first recovery roll (240) in a roll-to-roll manner.

[0124] When the first release sheet (212) is separated from the adhesive tape material (210), the first adhesive surface (214a) of the adhesive tape (214) can be exposed to the outside, and as the sealing portion (24) folded in the vertical direction (D2) is pressed in the horizontal direction (D1) (direction approaching the side of the pouch body) by the pressing portion (100) and comes into contact with the first adhesive surface (214a) of the adhesive tape (214), the adhesive tape (214) can be separated from the second release sheet and transferred to the target adhesive surface (24c) of the sealing portion (24).

[0125] The second recovery roll (250) is configured to recover the second release sheet (216) from the adhesive tape material (210). That is, the second recovery roll (250) is configured to recover the second release sheet (216) after the adhesive tape (214) is transferred from the second release sheet (216) to the sealing portion (24).

[0126] The second recovery roll (250) may be provided with various structures capable of recovering the second release sheet (216), and the present invention is not limited or restricted by the structure and recovery method of the second recovery roll (250).

[0127] For example, the second recovery roll (250) may be provided facing the supply roll (220) at a predetermined distance apart, and the second release sheet (216) with the adhesive tape (214) separated (the second release sheet with the adhesive tape separated as the sealing part contacts the adhesive tape by the pressure part) may be wound onto the second recovery roll (250) in a roll-to-roll manner and recovered.

[0128] In this way, the embodiment of the present invention allows the first release sheet (212) and the second release sheet (216) to be recovered from the adhesive tape material (210) to the first recovery roll (240) and the second recovery roll (250) in a roll-to-roll manner, thereby minimizing the equipment and space required to recover the first release sheet (212) and the second release sheet (216), and obtaining the advantageous effect of improving space utilization and design freedom.

[0129] The fabric transfer unit (230) is provided to selectively transfer the adhesive tape fabric (210) so that the adhesive tape fabric (210) is selectively positioned between the target adhesive surface (24c) and the side of the pouch body (22).

[0130] Here, the adhesive tape material (210) being positioned between the target adhesive surface (24c) and the side of the pouch body (22) can be defined as the adhesive tape (214) being placed at a supply position facing the target adhesive surface (24c) of the sealing part (24).

[0131] The fabric conveying unit (230) may be provided with various structures capable of selectively conveying the adhesive tape fabric (210), and the present invention is not limited or restricted by the structure of the fabric conveying unit (230).

[0132] According to a preferred embodiment of the present invention, the fabric transfer unit (230) may include a lifting member (232) provided to be selectively raised and lowered from a first position positioned above the target adhesive surface (24c) to a second position positioned between the target adhesive surface (24c) and the side of the pouch body (22), and when the lifting member (232) lowers to the second position, the adhesive tape fabric (210) is pressed by the lifting member (232) and transferred between the target adhesive surface (24c) and the side of the pouch body (22), and the adhesive tape (214) may be positioned to face the target adhesive surface (24c).

[0133] The lifting member (232) may be provided in various structures according to required conditions and design specifications, and the present invention is not limited or restricted by the structure and shape of the lifting member (232).

[0134] For example, the lifting member (232) may be formed to have a roughly rectangular plate shape. Alternatively, it is also possible to configure the lifting member (232) to have a straight rod shape or other shapes.

[0135] With this structure, when the adhesive tape material (210) is supplied from the supply roll (220) and the lifting member (232) descends to the second position, the second release sheet (216) can be folded into a roughly 'V' shape, and the adhesive tape (214) can be positioned to face the target adhesive surface (24c) between the side of the pouch body (22) and the sealing part (24).

[0136] On the other hand, after the adhesive tape (214) is transferred to the target adhesive surface (24c) of the sealing part (24), the second recovery roll (250) can wind and recover the second release sheet (216), and at the same time, the lifting member (232) can rise (return) to the first position.

[0137] According to a preferred embodiment of the present invention, the lifting member (232) can perform the role of supplying the adhesive tape (214) (transporting the adhesive tape material) and simultaneously perform the role of supporting the folding of the sealing part (24) by the pressing member (110).

[0138] That is, according to a preferred embodiment of the present invention, the pressing member (110) may be configured to move in a vertical direction (D2) and bend the sealing portion (24) toward the vertical direction (D2) while the lifting member (232) is lowered to the second position.

[0139] In this way, the embodiment of the present invention can obtain the advantageous effect of accurately folding the sealing part (24) into an intended angle (e.g., L-shape) by moving the pressing member (110) in a vertical direction (D2) and pressing the sealing part (24) while the lifting member (232) is lowered to the second position, that is, while the lower end of the lifting member (232) is in contact with the upper surface of the sealing part (24) and supports the upper surface of the sealing part (24).

[0140] Additionally, the lifting member (232) can perform the role of transporting the adhesive tape material (210) (descending with the second release sheet folded) and simultaneously perform the role of stably transferring the adhesive tape (214) to the target adhesive surface (24c) of the sealing part (24).

[0141] That is, according to a preferred embodiment of the present invention, the pressing member (110) may be configured to first press the sealing portion (24) to transfer the adhesive tape (214) from the adhesive tape material (210) to the target adhesive surface (24c) while the lifting member (232) is lowered to the second position, and after the lifting member (232) is raised to the first position, the pressing member (110) may secondly press the sealing portion (24) to adhere the adhesive tape (214) to the side of the pouch body (22).

[0142] In this way, the embodiment of the present invention allows the sealing part (24) to come into contact with the adhesive tape (214) by the pressure applied

[0143] Referring to FIGS. 1, 6 and 7, according to a preferred embodiment of the present invention, a pouch manufacturing device (10) for a secondary battery may include a support member (260) that faces a lifting member (232) and supports the bottom surface of a sealing portion (24).

[0144] The support member (260) may be provided in various structures capable of supporting the bottom surface of the sealing portion (24) while facing the lifting member (232), and the present invention is not limited or restricted by the structure and shape of the support member (260).

[0145] For example, the support member (260) may be formed in the shape of a roughly rectangular plate having a width (thickness) corresponding to the lifting member (232). According to another embodiment of the present invention, it is also possible to configure the lifting member to have a width smaller or larger than that of the support member. Alternatively, it is also possible to configure a plurality of support members to cooperatively support the bottom surface of the sealing portion corresponding to the lifting member.

[0146] In this way, the embodiment of the present invention allows the bottom surface of the sealing portion (24) to be supported via the support member (260) in correspondence with the lifting member (232), thereby suppressing sagging and deformation of the sealing portion (24) caused by the lifting member (232) when the lifting member (232) descends to a second position to contact the upper surface of the sealing portion (24), so that the sealing portion (24) can be accurately bent into a predetermined position and an advantageous effect can be obtained for accurately transferring the adhesive tape (214) to the target adhesive surface (24c) of the sealing portion (24).

[0147] Example 2

[0148] Hereinafter, with reference to FIGS. 4 to 9, the manufacturing process of a pouch (20) by a secondary battery pouch manufacturing device (10) according to an embodiment of the present invention will be described. In addition, a pouch (20) produced by a secondary battery pouch manufacturing device (10) according to an embodiment of the present invention can be seen through FIG. 10.

[0149] For reference, contents common to Example 1 will be omitted as much as possible, and Example 2 will be described. That is, it is obvious that if content not explained in Example 2 is required, it can be considered as content of Example 1.

[0150] First, as shown in FIG. 4, a pouch (20) is provided, comprising a pouch body (22) and a sealing portion (24) protruding along the horizontal direction (D1) on the side of the pouch body (22).

[0151] According to a preferred embodiment of the present invention, the sealing portion (24) may include a first sealing portion (24a) protruding from the pouch body (22) along the horizontal direction (D1), and a second sealing portion (24b) connected to the end of the first sealing portion (24a) in a folded manner and defining a target adhesive surface (24c).

[0152] Next, as shown in FIG. 5, the adhesive tape material (210) is supplied from the supply roll (220) and at the same time the lifting member (232) is lowered to the second position, so that the second release sheet (216) can be folded into a roughly 'V' shape.

[0153] At this time, the first release sheet (212) separated from the adhesive tape material (210) supplied from the supply roll (220) can be wound onto the first recovery roll (240) in a roll-to-roll manner and recovered.

[0154] Additionally, when the lifting member (232) descends to the second position, the bottom surface of the sealing part (24) corresponding to the lifting member (232) can be supported by the support member (260).

[0155] Next, as shown in FIG. 6, the pressure member (110) positioned at the bottom of the sealing part (24) moves in a straight line in the vertical direction (D2) (upward direction) and presses the sealing part (24), thereby allowing the sealing part (24) to be folded (folded to form an approximately 'L' shape) toward the vertical direction (D2) which is orthogonal to the horizontal direction (D1).

[0156] At this time, the lifting member (232) can perform the role of supplying the adhesive tape (214) (transporting the adhesive tape material (210)) and simultaneously perform the role of supporting the folding of the sealing part (24) by the pressing member (110).

[0157] That is, the pressure member (110) is configured to move in a vertical direction (D2) and bend the sealing part (24) toward the vertical direction (D2) when the lifting member (232) is lowered to a second position (a state in which the lower end of the lifting member contacts the upper surface of the sealing part and supports the upper surface of the sealing part).

[0158] Next, as shown in FIG. 7, a pressure member (110) positioned on the side of the folded sealing portion (24) moves in a straight line in the horizontal direction (D1) (left and right direction) and presses the sealing portion (24) (first pressure), so that the sealing portion (24) comes into contact with the adhesive tape (214), and the adhesive tape (214) of the adhesive tape material (210) can be transferred from the second release sheet (216) to the sealing portion (24).

[0159] At this time, the lifting member (232) performs the role of transporting the adhesive tape material (210) (lowering the second release sheet in a folded state) and can also perform the role of stably transferring the adhesive tape (214) to the target adhesive surface (24c) of the sealing part (24).

[0160] That is, the pressing member (110) is configured to first press the sealing part (24) while the lifting member (232) is lowered to the second position, thereby transferring the adhesive tape (214) from the adhesive tape material (210) to the target adhesive surface (24c) of the sealing part (24).

[0161] Next, as shown in FIG. 8, after the adhesive tape (214) is transferred to the target adhesive surface (24c) of the sealing part (24), the second recovery roll (250) winds and recovers the second release sheet (216), and at the same time, the lifting member (232) rises (returns) to the first position.

[0162] Next, as shown in FIG. 9, as the pressing member (110) moves linearly in the horizontal direction (D1) (left and right direction) and presses the sealing part (24) (secondary pressing), the adhesive tape (214) transferred to the sealing part (24) can be attached to the side of the pouch body (22). Consequently, as shown in FIG. 10, the sealing part (24) can be fixed to the side of the pouch body (22) in a folded state (double-folded state) via the adhesive tape (214).

[0163] Although the invention has been described above with reference to embodiments, this is merely illustrative and does not limit the invention. Those skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments may be modified and implemented. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

[0164] [Explanation of the symbol]

[0165] 10: Secondary battery pouch manufacturing device

[0166] 20: Pouch

[0167] 22: Pouch body

[0168] 22a: Side of the pouch body

[0169] 24 : Sealing part

[0170] 24a: First sealing part

[0171] 24b: Second sealing part

[0172] 24c : Target adhesive surface

[0173] 30 : Electrode assembly

[0174] 100 : Pressurizing part

[0175] 110 : Pressurizing member

[0176] 200 : Adhesive tape supply unit

[0177] 210 : Adhesive tape material

[0178] 212 : 1st Type Sheet

[0179] 214 : Adhesive tape

[0180] 214a: First adhesive surface

[0181] 214b : Second adhesive surface

[0182] 216 : 2nd Type Sheet

[0183] 220 : Supply Roll

[0184] 230 : Fabric transfer unit

[0185] 232 : Elevator member

[0186] 240 : 1st recovery roll

[0187] 250 : 2nd recovery roll

[0188] 260 : Support member

Claims

1. An apparatus for manufacturing a pouch for a secondary battery, comprising a pouch body that accommodates an electrode assembly inside and a sealing portion that protrudes along a horizontal direction on the side of the pouch body, A pressure member provided to selectively press the sealing member along the vertical direction so that the sealing member is bent toward a vertical direction orthogonal to the horizontal direction, and to selectively press the sealing member along the horizontal direction so that the bent sealing member moves toward the pouch body; and It includes an adhesive tape supply unit that supplies an adhesive tape to the target adhesive surface of the sealing portion facing the side of the pouch body. A secondary battery pouch manufacturing device in which the above adhesive tape is bonded between the target adhesive surface and the side of the pouch body as the sealing part is pressed in the horizontal direction by the above pressure part.

2. In Paragraph 1, The above-mentioned pressurizing unit is a secondary battery pouch manufacturing apparatus comprising a pressurizing member provided to be selectively linearly movable along the vertical direction and the horizontal direction.

3. In Paragraph 2, The above-mentioned pressure member is, With the sealing portion in a bent state, move linearly along the horizontal direction so that the target adhesive surface contacts the first adhesive surface of the adhesive tape, and then apply primary pressure to the sealing portion, A secondary battery pouch manufacturing device configured to move linearly along the horizontal direction so that the second adhesive surface of the adhesive tape is adhered to the side of the pouch body and to apply secondary pressure to the sealing portion.

4. In Paragraph 2, The above sealing part is, A first sealing portion protruding from the pouch body along the horizontal direction above; and A second sealing part that is connected to the end of the first sealing part by being bent and defines the target adhesive surface; comprising A secondary battery pouch manufacturing apparatus in which, when the above-mentioned pressure member moves in the above-mentioned vertical direction, the first sealing portion is bent by the above-mentioned pressure member and the target adhesive surface of the second sealing portion is positioned to face the side of the pouch body.

5. In Paragraph 3, The above adhesive tape supply unit is, A supply roll for supplying an adhesive tape material comprising the adhesive tape, a first release sheet laminated to the first adhesive surface, and a second release sheet laminated to the second adhesive surface; A material transfer unit that selectively transfers the adhesive tape material so that the adhesive tape material is selectively positioned between the target adhesive surface and the side of the pouch body; A first recovery roll for recovering the first release sheet from the adhesive tape material; and A second recovery roll for recovering the second release sheet from the adhesive tape material; A secondary battery pouch manufacturing device including 6. In Paragraph 5, The above fabric transfer unit is, It includes a lifting member provided to be selectively raised and lowered from a first position positioned above the target adhesive surface to a second position positioned between the target adhesive surface and the side of the pouch body. A secondary battery pouch manufacturing apparatus in which, when the lifting member descends to the second position, the adhesive tape material is pressed by the lifting member and transported between the target adhesive surface and the side of the pouch body, and the adhesive tape is positioned to face the target adhesive surface.

7. In Paragraph 6, The above-described pressure member is configured to move in the vertical direction and bend the sealing portion toward the vertical direction while the lifting member is lowered to the second position, in a secondary battery pouch manufacturing device.

8. In Paragraph 6, The above-mentioned pressing member, while the lifting member is lowered to the second position, first presses the sealing portion to transfer the adhesive tape from the adhesive tape material to the target adhesive surface, and A secondary battery pouch manufacturing apparatus configured such that after the lifting member rises to the first position, the pressing member presses the sealing portion a second time to adhere the adhesive tape to the side of the pouch body.

9. In Paragraph 6, A secondary battery pouch manufacturing apparatus comprising a support member facing the lifting member and supporting the bottom surface of the sealing portion.

10. In Paragraph 5, A secondary battery pouch manufacturing device in which the adhesive tape is cut into predetermined units and a plurality of them are provided spaced apart along the length direction of the adhesive tape material.

11. In Paragraph 10, A secondary battery pouch manufacturing device in which the above adhesive tape material is wound in a roll form onto the above supply roll.

12. A method for manufacturing a pouch for a secondary battery comprising a pouch body that accommodates an electrode assembly inside and a sealing portion that protrudes along a horizontal direction on the side of the pouch body, A step of vertically pressing the sealing portion along the vertical direction using a pressing member provided to be selectively linearly movable along the vertical direction and the horizontal direction so that the sealing portion is bent toward a vertical direction orthogonal to the horizontal direction; A step of supplying an adhesive tape to the target adhesive surface of the sealing portion facing the side of the pouch body; and The method includes the step of horizontally pressing the sealing portion along the horizontal direction using the pressing member so that the folded sealing portion moves in a direction approaching the pouch body; A method for manufacturing a pouch for a secondary battery in which the above adhesive tape is bonded between the target adhesive surface and the side of the pouch body as the sealing portion is pressed in the horizontal direction.

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