Degassing device for pouch-type secondary battery and degassing method for pouch-type secondary battery using same

Abstract

The present invention relates to a degassing device for a pouch-type secondary battery and a degassing method for a pouch-type secondary battery using same. The degassing device is a device for removing gas from a pouch-type secondary battery and comprises a first pocket unit that accommodates an electrode assembly and a second pocket unit for collecting gas, the degassing device being characterized by including a first jig unit that is positioned on one surface of the second pocket unit and absorbs gas collected in the second pocket unit; and a second jig unit that is positioned on the other surface of the second pocket unit and absorbs gas collected in the second pocket unit, wherein the first jig unit includes a first support plate, a first absorption part, and a first adsorption part, and the first support plate is formed such that a region where the first absorption part is positioned protrudes toward the one surface of the second pocket unit more than a region where the first adsorption part is positioned.

Description

Pouch-type secondary battery degassing device and pouch-type secondary battery degassing method using the same

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0160462 filed November 12, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0002] The present invention relates to a pouch-type secondary battery degassing device and a pouch-type secondary battery degassing method using the same, and more specifically, to a pouch-type secondary battery degassing device and a pouch-type secondary battery degassing method using the same that prevents the discharge of an electrolyte contained inside when removing gas generated during the activation process of a pouch-type secondary battery.

[0003]

[0004] With the increasing technological development and demand for mobile devices, rechargeable secondary batteries are being used as an energy source for various mobile devices. Secondary batteries are also attracting attention as an energy source for electric vehicles and hybrid electric vehicles, which are being presented as alternatives to conventional gasoline and diesel vehicles that use fossil fuels.

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

[0006] A typical pouch-type secondary battery manufacturing process includes inserting an electrode assembly into a battery case receiving space made of a laminate sheet, injecting an electrolyte into the battery case, and then sealing it to perform an activation process.

[0007] Meanwhile, during the activation process, a large amount of gas is generated due to chemical reactions and side reactions between the electrolyte and the electrode. In order to collect this gas, the battery case is provided with a space for collecting gas in addition to a space for housing the electrode assembly.

[0008] In addition, a typical pouch-type secondary battery manufacturing process includes a degassing process to discharge gases generated during the activation process after the activation process is completed.

[0009] In this regard, FIG. 1 is a drawing for explaining a degassing device for a pouch-type secondary battery according to the prior art.

[0010] As shown in FIG. 1, the first suction part (1) and the second suction part (2), which are respectively located on one side and the other side of the second pocket part (12) for gas collection, pressurize the second pocket part (12) from both sides, and inhale the gas collected in the second pocket part (12) through the hole formed in the second pocket part (12) and discharge the gas.

[0011] At this time, during the process in which the first suction part (1) and the second suction part (2) suck in the gas collected in the second pocket part (12), a phenomenon may occur in which the electrolyte embedded in the pouch-type secondary battery is discharged along with the gas, and this causes a problem of degrading the performance of the secondary battery due to a shortage of electrolyte.

[0012]

[0013] (Prior Art Literature)

[0014] (Patent Document 1) Korean Published Patent Application No. 10-2018-0062839

[0015]

[0016] To solve the above-mentioned problems, the present invention aims to provide a pouch-type secondary battery degassing device capable of preventing the discharge of electrolyte during the degassing process, and a pouch-type secondary battery degassing method using the same.

[0017]

[0018] As a technical means for achieving the above-mentioned purpose, a pouch-type secondary battery degassing device according to one embodiment of the present invention is a degassing device for removing gas from a pouch-type secondary battery (10) comprising a first pocket portion (11) for housing an electrode assembly and a second pocket portion (12) for collecting gas, wherein the device comprises: a first jig portion (100) located on one side of the second pocket portion (12) and sucking in the gas collected in the second pocket portion (12); The apparatus comprises a second jig part (200) positioned to correspond to the first jig part (100), positioned on the other side of the second pocket part (12), and sucking in gas collected in the second pocket part (12); wherein the first jig part (100) includes a first support plate (110), a first suction part (120) for sucking in gas collected in the second pocket part (12), and a first adsorption part (130) positioned below the first suction part (120) to adsorb the lower side of one side of the second pocket part (12), and the first support plate (110) is formed such that the area where the first suction part (120) is located protrudes toward one side of the second pocket part (12) more than the area where the first adsorption part (130) is located.

[0019] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the first suction part (120) is characterized by comprising: a first piercing unit (121) provided to form a venting hole (12a) on one surface of the second pocket part (12); a first pad (122) having a first hole (122a) formed where the first piercing unit (121) is disposed, and protruding closer to one surface of the second pocket part (12) than to one surface of the first support plate (110); and a first sealing part (123) sealing the periphery of the venting hole (12a).

[0020] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the first support plate (110) is characterized by having a first suction channel (111) formed therein that communicates with the first hole (122a) and sucks in the gas collected in the second pocket portion (12).

[0021] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the first jig part (100) further comprises a first suction unit (140) communicating with the first suction channel (111).

[0022] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the first adsorption portion (130) is characterized by comprising: a plurality of first adsorption holes (131) formed to vacuum adsorb the lower side of one surface of the second pocket portion (12); and a second pad (132) disposed on one surface of the first support plate (110) to surround the periphery of the plurality of first adsorption holes (131).

[0023] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, a second suction channel (112) is formed in the first support plate (110) to communicate with the plurality of first suction holes (131) and to vacuum suction the lower side of one surface of the second pocket portion (12), and the first jig portion (100) further includes a first suction unit (150) that communicates with the second suction channel (112).

[0024] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the second jig portion (200) comprises: a second support plate (210); a second suction portion (220) for sucking gas collected in the second pocket portion (12); and a second adsorption portion (230) located below the second suction portion (220) for adsorbing the lower side of the other side of the second pocket portion (12), wherein the second support plate (210) is formed such that the area where the second suction portion (220) is located protrudes toward the other side of the second pocket portion (12) more than the area where the second adsorption portion (230) is located.

[0025] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the second suction part (220) is characterized by comprising: a second piercing unit (221) provided to form a venting hole (12a) on the other side of the second pocket part (12); a third pad (222) that protrudes closer to the other side of the second pocket part (12) than to one side of the second support plate (210), having a second hole (222a) formed where the second piercing unit (221) is disposed; and a second sealing part (223) that seals the periphery of the venting hole (12a).

[0026] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the second support plate (210) is characterized by having a third suction channel (211) formed therein that communicates with the second hole (222a) and sucks in the gas collected in the second pocket portion (12).

[0027] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the second jig part (200) further comprises a second suction unit (240) communicating with the third suction channel (211).

[0028] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the second adsorption part (230) is characterized by comprising: a plurality of second adsorption holes (231) formed to vacuum adsorb the lower side of the other surface of the second pocket part (12); and a fourth pad (232) disposed on one surface of the second support plate (210) to surround the periphery of the plurality of second adsorption holes (231).

[0029] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, a fourth suction channel (212) is formed in the second support plate (210) to communicate with the plurality of second suction holes (231) and to vacuum suction the lower side of the other surface of the second pocket portion (12), and the second jig portion (200) further includes a second suction unit (250) that communicates with the fourth suction channel (212).

[0030] In addition, in a pouch-type secondary battery degassing device according to one embodiment of the present invention, the first sealing portion (123) is formed to protrude toward one side of the second pocket portion (12), and the second sealing portion (223) is formed to be recessed inward so that the first sealing portion (123) is inserted.

[0031] In addition, a pouch-type secondary battery degassing method using a pouch-type secondary battery degassing device according to one embodiment of the present invention comprises: (S1) a step of positioning the second pocket portion (12) between the first jig portion (100) and the second jig portion (200); (S2) a step of forming a venting hole (12a) by bringing the first jig portion (100) and the second jig portion (200) into close contact with the second pocket portion (12); (S3) a step of spreading the second pocket portion (12) to both sides through the first jig portion (100) and the second jig portion (200); and (S4) a step of sucking in the gas collected in the second pocket portion (12) through the first jig portion (100) and the second jig portion (200).

[0032] In addition, the pouch-type secondary battery degassing method according to one embodiment of the present invention is characterized by further including the step of sealing the area around the venting hole (12a) through the first jig part (100) and the second jig part (200) after the step (S4).

[0033]

[0034] As described above, according to the pouch-type secondary battery degassing device and the pouch-type secondary battery degassing method using the same according to the present invention, the device includes a first suction part that sucks gas into one side of a second pocket part and a first adsorption part located below the first suction part and adsorbing the lower side of one side of the second pocket part, and the first suction part sucks gas collected in the second pocket part while the first adsorption part secures an internal space of the second pocket part so that electrolyte can remain, thereby preventing the phenomenon of electrolyte being discharged.

[0035] In addition, according to the pouch-type secondary battery degassing device and the pouch-type secondary battery degassing method using the same according to the present invention, the first suction part is provided in a state protruding toward the second pocket part more than the first adsorption part, so that even if the first suction part pressurizes the second pocket part and sucks in gas, the first adsorption part can secure the internal space of the second pocket part.

[0036]

[0037] FIG. 1 is a drawing for explaining a degassing device according to the prior art.

[0038] Figure 2 is a diagram illustrating a pouch-type secondary battery.

[0039] FIG. 3 is a perspective view illustrating a pouch-type secondary battery degassing device according to the present invention.

[0040] FIG. 4 is a perspective view illustrating the first jig portion of a pouch-type secondary battery degassing device according to the present invention.

[0041] FIG. 5 is a plan view illustrating the first jig portion of a pouch-type secondary battery degassing device according to the present invention.

[0042] FIG. 6 is a perspective view illustrating the second jig portion of a pouch-type secondary battery degassing device according to the present invention.

[0043] FIG. 7 is a plan view illustrating the second jig portion of a pouch-type secondary battery degassing device according to the present invention.

[0044] FIG. 8 is a conceptual diagram illustrating the operation of a pouch-type secondary battery degassing device according to the present invention.

[0045] FIG. 9 is a side view illustrating a pouch-type secondary battery degassing device according to the present invention.

[0046] FIG. 10 is a side view illustrating the piercing operation of a pouch-type secondary battery degassing device according to the present invention.

[0047] FIG. 11 is a side view illustrating the appearance of a pouch-type secondary battery degassing device according to the present invention inhaling gas.

[0048] FIG. 12 is a side view illustrating the sealing of a pouch-type secondary battery degassing device according to the present invention.

[0049]

[0050] Embodiments that enable a person skilled in the art to easily implement the present invention are described in detail below with reference to the attached drawings. However, in describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0051] In addition, the same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected, but also cases where they are indirectly connected with other elements in between. Furthermore, unless specifically stated otherwise, the inclusion of a certain component does not exclude other components but implies that additional components may be included.

[0052]

[0053] Hereinafter, a pouch-type secondary battery degassing device according to the present invention and a pouch-type secondary battery degassing method using the same will be described.

[0054] First, referring to FIG. 2, which is a drawing for explaining a pouch-type secondary battery, the pouch-type secondary battery (10) is configured to include an electrode assembly (not shown) in which a pair of electrode leads (13) are positioned opposite each other or parallel in the same direction, a first pocket portion (11) for housing the electrode assembly (not shown), and a second pocket portion (12) for gas collection.

[0055] At this time, the first pocket portion (11) is filled with electrolyte, and the upper edge of the second pocket portion (12), which is used as an electrolyte injection port, has a sealing portion (S) formed by heat fusion.

[0056] A pouch-type secondary battery forms a first pocket portion (11) and a second pocket portion (12) using a laminate sheet composed of an outer coating layer, a metal layer, and an inner coating layer.

[0057] Since the inner coating layer comes into direct contact with the electrode assembly, it must possess insulation and electrostatic resistance. Additionally, to ensure sealing from the outside, the sealing area formed by the thermal bonding of the inner layers must have excellent thermal bonding strength.

[0058] The material for this inner coating layer may be selected from, but is not limited to, polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, polyurethane resins, and polyimide resins, which have excellent chemical resistance and good sealing properties; however, polypropylene is most preferable as it has excellent mechanical properties such as tensile strength, stiffness, surface hardness, and impact strength, as well as excellent chemical resistance.

[0059] The metal layer in contact with the inner coating layer serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside, and a lightweight aluminum film with excellent formability can be used as a preferred material for this metal layer.

[0060] In addition, an outer coating layer is provided on the other side of the metal layer, and this outer coating layer may use a heat-resistant polymer with excellent tensile strength, moisture resistance, and air permeability resistance to ensure heat resistance and chemical resistance while protecting the electrode assembly, and may use, for example, nylon or polyethylene terephthalate, but is not limited thereto.

[0061] The electrode assembly housed in the first pocket portion (11) may be a jelly-roll type electrode assembly having a structure in which a separator is interposed between a long sheet-type cathode and an anode and then wound, or a stack type electrode assembly composed of unit cells having a structure in which rectangular anodes and cathodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which unit cells are wound by a long separating film, or a lamination-stack type electrode assembly in which unit cells are stacked with a separator interposed between them and attached to each other, but is not limited thereto.

[0062] The positive electrode is composed of a positive current collector and a positive active material coated on the upper and lower surfaces of the positive current collector; the positive active material may be mixed with a conductive material and a binder, and a filler may be further added if necessary.

[0063] The cathode is composed of a cathode current collector and a cathode active material applied to the lower and upper surfaces of the cathode current collector, and a conductive material and a binder may be additionally mixed into the cathode active material and coated onto the cathode current collector.

[0064] The separator prevents a short circuit between the aforementioned cathode and anode and enables only the movement of lithium ions. The material of such a separator is preferably selected from polyethylene, polypropylene, a polyethylene / polypropylene double layer, a polyethylene / polypropylene / polyethylene triple layer, a polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0065]

[0066] FIG. 3 is a perspective view for explaining a pouch-type secondary battery degassing device according to the present invention, FIG. 4 is a perspective view for explaining a first jig part of a pouch-type secondary battery degassing device according to the present invention, and FIG. 5 is a plan view for explaining a first jig part of a pouch-type secondary battery degassing device according to the present invention.

[0067] Referring to FIGS. 2 to 5, a degassing device for removing gas from a pouch-type secondary battery (10) having the above-described configuration comprises a first jig part (100) and a second jig part (200).

[0068] In order to inhale the gas collected in the second pocket portion (12), the first jig portion (100) may be located on one side of the second pocket portion (12) (8 o'clock direction in Fig. 3), and the second jig portion (200) may be located on the other side of the second pocket portion (12) (2 o'clock direction in Fig. 3).

[0069] First, the first jig section (100) will be described in detail. The first jig section (100) may include a first support plate (110), a first suction section (120), a first adsorption section (130), a first suction unit (140), and a first adsorption unit (150).

[0070] The first support plate (110) is provided to support the first suction part (120) and the first adsorption part (130). The first suction part (120) is positioned on the upper side of one surface of the first support plate (110) (12 o'clock direction in Fig. 4), and the first adsorption part (130) may be positioned on the lower side of one surface of the first support plate (110) (6 o'clock direction in Fig. 4). Here, one surface of the first support plate (110) is a surface facing one surface of the second pocket part (12).

[0071] Additionally, the first support plate (110) may be formed such that the area where the first suction part (120) is located protrudes toward one side of the second pocket part (12) more than the area where the first adsorption part (130) is located. In other words, the upper part of one side of the first support plate (110) where the first suction part (120) is located may be formed to protrude toward the second pocket part (12) more than the lower part where the first adsorption part (130) is located.

[0072] In the first support plate (110), a first suction channel (111) is formed that communicates with the first suction part (120) and sucks in gas collected in the second pocket part (12) through the first suction part (120), and a second suction channel (112) may be formed that communicates with the first adsorption part (130) and vacuum adsorbs the lower side of one side of the second pocket part (12), and a detailed explanation thereof will be provided later.

[0073] The first suction part (120) is positioned on the upper side of one surface of the first support plate (110) and can suck in gas collected in the second pocket part (12). This first suction part (120) may be configured to include a first piercing unit (121), a first pad (122), and a first sealing part (123).

[0074] The first piercing unit (121) is positioned so as to face the second pocket portion (12) from one side of the first support plate (110) and may be provided to form a venting hole (12a) on one side of the second pocket portion (12). For example, when the first jig portion (100) moves toward the second pocket portion (12), the first piercing unit (121) may come into contact with one side of the second pocket portion (12) and penetrate one side of the second pocket portion (12) to form a venting hole (12a).

[0075] At this time, the first piercing unit (121) may be a pin member or a knife member with one end pointed, but is not limited thereto and may be provided with a piercing member that is obvious to a person skilled in the art.

[0076] The first pad (122) is positioned so as to protrude closer to one side of the second pocket portion (12) than to one side of the first support plate (110), and can form a first hole (122a) in which the first piercing unit (121) is positioned.

[0077] The first hole (122a) can draw gas from the venting hole (12a) of the second pocket portion (12) formed by the first piercing unit (121). The first hole (122a) can be in communication with the first suction passage (111) of the first support plate (110) described above.

[0078] For example, a first piercing unit (121) is disposed on the inner side of the first hole (122a), and a venting hole (12a) is formed on one side of the second pocket portion (12) by this first piercing unit (121). In addition, the formed venting hole (12a) and the first hole (122a) are positioned to correspond to each other, so that the first hole (122a) can more efficiently suck in the gas collected in the second pocket portion (12) from the venting hole (12a).

[0079] Additionally, the first pad (122) includes a first protruding pad (122b) positioned to protrude from one side of the first support plate (110), and the first protruding pad (122b) may be formed to surround the periphery of the first hole (122a).

[0080] The first protruding pad (122b) can partition the area around the venting hole (12a) to more efficiently inhale (vent) the gas discharged through the venting hole (12a). For example, the first protruding pad (122b) can maintain a sealed state within the internal area of ​​the first protruding pad (122b) by being in close contact with the area around where the venting hole (12a) is formed in the second pocket portion (12), thereby allowing the gas collected in the second pocket portion (12) to be more efficiently inhaled during vacuum suction.

[0081] For example, the first protruding pad (122b) may be configured such that one side in contact with the second pocket portion (12) is formed as a ring-shaped pad, and an elastic member (e.g., a spring member) having elasticity is connected to the rear surface of the ring-shaped pad, and when pressure is applied to the first protruding pad (122b) due to this configuration, it can be compressed backward by the elastic member. In addition, as another example, the first protruding pad (122b) may be provided as a pad made of an elastic material.

[0082] Additionally, the first protruding pad (122b) may include a first protruding pad (122b') formed closer to the first hole (122a) and a first protruding pad (122b") formed further away from the first hole (122a), and the double-formed first protruding pad (122b) can increase the sealing force of the area around the venting hole (12a).

[0083] Additionally, a first fastening hole (122c) may be formed in the recessed area formed between the first a protruding pad (122b') and the first b protruding pad (122b") so that the first pad (122) is coupled to one side of the first support plate (110). At this time, the first fastening hole (122c) may be coupled to one side of the first support plate (110) by a fastening member (not shown).

[0084] The first sealing portion (123) is formed on the outer side of the first protruding pad (122b) and may be provided to seal the area around the venting hole (12a) formed by the first piercing unit (121). The first sealing portion (123) may be formed protruding from one side of the first support plate (110) toward the second pocket portion (12).

[0085] The first sealing portion (123) may be provided as a heating block to heat-seal a part of the second pocket portion (12), but is not limited thereto. The first sealing portion (123) may be provided to contact the second sealing portion (223) described later to deform a part of the shape of the second pocket portion (12) and seal the area around the venting hole (12a). A more detailed explanation of this will be provided later.

[0086] A first adsorption part (130) located below the first suction part (120) is positioned below one side of the first support plate (110) and can adsorb the lower side of one side of the second pocket part (12). This first adsorption part (130) may be configured to include a first adsorption hole (131) and a second pad (132).

[0087] The first suction hole (131) is connected to the second suction channel (112) of the first support plate (110) and may be formed in multiple numbers to vacuum suction the lower side of one side of the second pocket portion (12), and these first suction holes (131) may be connected to each other through the second suction channel (112).

[0088] A plurality of first adsorption holes (131) may be provided to vacuum adsorb the lower side of the area where the venting hole (12a) is formed on one side of the second pocket portion (12).

[0089] Additionally, the second pad (132) is positioned to protrude from one side of the first support plate (110) and can be formed to surround the periphery of a plurality of first suction holes (131).

[0090] The second pad (132) can partition the area surrounding the plurality of first suction holes (131) to more efficiently suction the lower side of one surface of the second pocket portion (12) through the plurality of first suction holes (131). For example, the second pad (132) can maintain a sealed state within the internal area of ​​the second pad (132) by being in close contact with the lower side of one surface of the second pocket portion (12), thereby allowing the lower area of ​​one surface of the second pocket portion (12) to be more efficiently suctioned during vacuum suction.

[0091] For example, the second pad (132) may be provided with a shape in which one side in contact with the second pocket portion (12) has a ring-shaped pad, and an elastic member (e.g., a spring member) having elastic force is connected to the rear side of the ring-shaped pad, and when pressure is applied to the second pad (132) due to this shape, it can be compressed backward by the elastic member. In addition, as another example, the second pad (132) may be provided as a pad made of an elastic material.

[0092] At this time, the first adsorption part (130) is located further back from the second pocket part (12) than the first suction part (120) due to the shape of the first support plate (110) described above, and even if the first suction part (120) sucks in the gas collected inside the second pocket part (12) and pressurizes the second pocket part (12), since the first adsorption part (130) is located further back than the first suction part (120), an internal space can be secured so that the electrolyte does not rise toward the venting hole (12a) but remains inside.

[0093] Meanwhile, the first suction unit (140) may be connected to the first suction passage (111) formed in the first support plate (110). More specifically, the first suction unit (140) is connected to the other end of the first suction passage (111) which is connected to the first hole (122a), and may be configured to suck gas collected in the second pocket portion (12) through the first hole (122a).

[0094] Additionally, the first adsorption unit (150) may be connected to a second suction channel (112) formed in the first support plate (110). More specifically, the first adsorption unit (150) is connected to the other end of the second suction channel (112) which is connected to a plurality of first adsorption holes (131), and may be configured to adsorb the lower side of one surface of the second pocket portion (12) through the plurality of first adsorption holes (131).

[0095] The first suction unit (140) and the first adsorption unit (150) may be provided with a vacuum suction structure, and since such a structure corresponds to known technology, a more detailed description will be omitted.

[0096] FIG. 6 is a perspective view illustrating a second jig portion of a pouch-type secondary battery degassing device according to the present invention, and FIG. 7 is a plan view illustrating a second jig portion of a pouch-type secondary battery degassing device according to the present invention.

[0097] Referring to FIGS. 2 to 7 together, the second jig part (200) may include a second support plate (210), a second suction part (220), a second adsorption part (230), a second suction unit (240), and a second adsorption unit (250).

[0098] The second support plate (210) is provided to support the second suction part (220) and the second adsorption part (230). The second suction part (220) is positioned on the upper side of one surface of the second support plate (210) (12 o'clock direction in FIG. 6), and the second adsorption part (230) may be positioned on the lower side of one surface of the second support plate (210) (6 o'clock direction in FIG. 6). Here, one surface of the second support plate (210) is a surface facing the other side of the second pocket part (12).

[0099] Additionally, the area where the second suction part (220) is located on the second support plate (210) may be formed to protrude toward the other side of the second pocket part (12) more than the area where the second adsorption part (230) is located. In other words, the upper part of the other side of the second support plate (210) where the second suction part (220) is located may be formed to protrude toward the second pocket part (12) more than the lower part where the second adsorption part (2330) is located.

[0100] A third suction channel (211) is formed in the second support plate (210) and communicates with the second suction part (220), through which gas collected in the second pocket part (12) is sucked in. Additionally, a fourth suction channel (212) may be formed in the second support plate (210) and communicates with the second adsorption part (230) to vacuum adsorb the lower side of the other surface of the second pocket part (12). A detailed description thereof will be provided later.

[0101] The second suction part (220) is positioned on the upper side of one surface of the second support plate (210) and can suck in gas collected in the second pocket part (12). This second suction part (220) may be configured to include a second piercing unit (221), a third pad (222), and a second sealing part (223).

[0102] The second piercing unit (221) is positioned so as to face the second pocket portion (12) from one side of the second support plate (210) and may be provided to form a venting hole (12a) on the other side of the second pocket portion (12). For example, when the second jig portion (200) moves toward the second pocket portion (12), the second piercing unit (221) may come into contact with the other side of the second pocket portion (12) and penetrate the other side of the second pocket portion (12) to form a venting hole (12a).

[0103] At this time, the second piercing unit (221) may be a pin member or a knife member with one end pointed, but is not limited thereto and may be provided with a piercing member that is obvious to a person skilled in the art.

[0104] The third pad (222) is positioned to protrude closer to the other side of the second pocket portion (12) than to one side of the second support plate (210), and can form a second hole (222a) in which the second piercing unit (221) is positioned.

[0105] The second hole (222a) can draw gas from the venting hole (12a) of the second pocket portion (12) formed by the second piercing unit (221). The second hole (222a) can be in communication with the third suction passage (211) of the aforementioned second support plate (210).

[0106] For example, a second piercing unit (221) is positioned on the inner side of the second hole (222a), and a venting hole (12a) is formed on the side of the second pocket portion (12) by this second piercing unit (221). In addition, the formed venting hole (12a) and the second hole (222a) are positioned to correspond to each other, so that the second hole (222a) can more efficiently suck in the gas collected in the second pocket portion (12) from the venting hole (12a).

[0107] Additionally, the third pad (222) includes a second protruding pad (222b) positioned to protrude from one side of the second support plate (210), and the second protruding pad (222b) may be formed to surround the periphery of the second hole (222a).

[0108] The second protruding pad (222b) can partition the area around the venting hole (12a) to more efficiently inhale (vent) the gas discharged through the venting hole (12a). For example, the second protruding pad (222b) can be in close contact with the area around where the venting hole (12a) is formed in the second pocket portion (12) to maintain a sealed state within the second protruding pad (222b), thereby allowing the gas collected in the second pocket portion (12) to be more efficiently inhaled during vacuum suction.

[0109] For example, the second protruding pad (222b) may be configured such that one side in contact with the second pocket portion (12) is formed as a ring-shaped pad, and an elastic member (e.g., a spring member) having elasticity is connected to the rear surface of the ring-shaped pad, and when pressure is applied to the second protruding pad (222b) due to this configuration, it can be compressed backward by the elastic member. In addition, as another example, the second protruding pad (222b) may be provided as a pad made of an elastic material.

[0110] Additionally, the second protruding pad (222b) may include a second protruding pad (222b') formed closer to the second hole (222a) and a second protruding pad (222b") formed further away from the second hole (222a), and the double-formed second protruding pad (222b) can increase the sealing force of the area around the venting hole (12a).

[0111] Additionally, a second fastening hole (222c) may be formed in the recessed area formed between the seconda protruding pad (222b') and the secondb protruding pad (222b") so that the third pad (222) is coupled to one side of the second support plate (210). At this time, the second fastening hole (222c) may be coupled to one side of the second support plate (210) by a fastening member (not shown).

[0112] The second sealing portion (223) is formed on the outer side of the second protruding pad (222b) and may be provided to seal the area around the venting hole (12a) formed by the second piercing unit (221). The second sealing portion (223) may be formed by protruding from one side of the second support plate (210) toward the second pocket portion (12), with a portion recessed inward so that a protruding portion of the first sealing portion (123) is inserted.

[0113] The first sealing portion (123) is formed in a shape that protrudes toward the second pocket portion (12), and the second sealing portion (123) is formed in a shape that is recessed inward so that the first sealing portion (123) is inserted therein, so that the second pocket portion (12) located between the first sealing portion (123) and the second sealing portion (223) can be sealed by being wrinkled to correspond to the shape in which the first sealing portion (123) and the second sealing portion (223) interlock.

[0114] The second sealing portion (223) may be provided as a heating block to heat-seal a portion of the second pocket portion (12), but is not limited thereto.

[0115] A second adsorption part (230) located below the second suction part (220) is positioned below one side of the second support plate (210) and can adsorb the lower side of the other side of the second pocket part (12). This second adsorption part (230) may be configured to include a second adsorption hole (231) and a fourth pad (232).

[0116] The second suction hole (231) is connected to the fourth suction channel (212) of the second support plate (210) and may be formed in multiple numbers to vacuum suction the lower side of the other face of the second pocket portion (12), and these second suction holes (231) may be connected to each other through the fourth suction channel (212).

[0117] A plurality of second adsorption holes (231) may be provided to vacuum adsorb the lower side of the area where the venting hole (12a) is formed on the other side of the second pocket portion (12).

[0118] Additionally, the fourth pad (232) is positioned to protrude from one side of the second support plate (210) and can be formed to surround the periphery of a plurality of second adsorption holes (231).

[0119] The fourth pad (232) can partition the surrounding area of ​​the plurality of second suction holes (231) to more efficiently suction the lower side of the other surface of the second pocket portion (12) through the plurality of second suction holes (231). For example, the fourth pad (232) can maintain a sealed state within the internal area of ​​the fourth pad (232) by being in close contact with the lower side of the other surface of the second pocket portion (12), thereby allowing the lower area of ​​the other surface of the second pocket portion (12) to be more efficiently suctioned during vacuum suction.

[0120] For example, the fourth pad (232) may be provided with a shape in which one side in contact with the second pocket portion (12) has a ring-shaped pad, and an elastic member (e.g., a spring member) having elastic force is connected to the rear side of the ring-shaped pad, and when pressure is applied to the fourth pad (232) due to this shape, it can be compressed backward by the elastic member. In addition, as another example, the fourth pad (232) may be provided as a pad made of an elastic material.

[0121] At this time, the second adsorption part (230) is located further back from the second pocket part (12) than the second suction part (220) due to the shape of the second support plate (210) described above, and even if the second suction part (220) sucks in the gas collected inside the second pocket part (12) and pressurizes the second pocket part (12), since the second adsorption part (230) is located further back than the second suction part (220), an internal space can be secured so that the electrolyte does not rise toward the venting hole (12a) but remains inside.

[0122] Meanwhile, the second suction unit (240) may be connected to a third suction channel (211) formed in the second support plate (210). More specifically, the second suction unit (240) is connected to the other end of the third suction channel (211) which is connected to the second hole (222a), and may be configured to suck gas collected in the second pocket portion (12) through the second hole (222a).

[0123] Additionally, the second adsorption unit (250) may be connected to a fourth suction channel (212) formed in the second support plate (210). More specifically, the second adsorption unit (250) is connected to the other end of the fourth suction channel (212) which is connected to a plurality of second adsorption holes (231), and may be configured to adsorb the lower side of the other surface of the second pocket portion (12) through the plurality of second adsorption holes (231).

[0124] The second suction unit (240) and the second adsorption unit (250) may be provided with a vacuum suction structure, and since such a structure corresponds to known technology, a more detailed description will be omitted.

[0125]

[0126] FIG. 8 is a conceptual diagram illustrating the operation of a pouch-type secondary battery degassing device according to the present invention, FIG. 9 is a side view illustrating a pouch-type secondary battery degassing device according to the present invention, and FIG. 10 is a side view illustrating the piercing operation of a pouch-type secondary battery degassing device according to the present invention. In addition, FIG. 11 is a side view illustrating the gas intake of a pouch-type secondary battery degassing device according to the present invention, and FIG. 12 is a side view illustrating the sealing operation of a pouch-type secondary battery degassing device according to the present invention.

[0127] Referring to FIGS. 2 to 12, the pouch-type secondary battery degassing method according to the present invention using a pouch-type secondary battery degassing device having the above-described configuration comprises: (S1) a step of positioning a second pocket portion (12) between a first jig portion (100) and a second jig portion (200); (S2) a step of forming a venting hole (12a) by bringing the first jig portion (100) and the second jig portion (200) into close contact with the second pocket portion (12); (S3) a step of spreading the second pocket portion (12) to both sides through the first jig portion (100) and the second jig portion (200); and (S4) a step of sucking in gas collected in the second pocket portion (12) through the first jig portion (100) and the second jig portion (200).

[0128] (S2) In step, the first jig part (100) and the second jig part (200) are in close contact with the second pocket part (12), and a venting hole (12a) can be formed on one side and the other side of the second pocket part (12) through the first piercing unit (121) and the second piercing unit (221), respectively.

[0129] Additionally, in step (S2), the first jig part (100) and the second jig part (200) can adsorb a portion of one side and the other side of the second pocket part (12) through the first suction part (120) and the first adsorption part (130), and the second suction part (220) and the second adsorption part (230), respectively.

[0130] In addition, in step (S3), the first jig part (100) and the second jig part (200) are moved backward while adsorbing one side and the other side of the second pocket part (12), respectively, so that the second pocket part (12) can be spread out to both sides.

[0131] (S4) In step, the first jig part (100) and the second jig part (200) pressurize the second pocket part (12) and can suck in the gas collected in the second pocket part (12) through the first suction part (120) and the second suction part (220). At this time, the first adsorption part (130) and the second adsorption part (230) are each located further back from the second pocket part (12) than the first suction part (120) and the second suction part (220), respectively, so that the electrolyte does not rise toward the venting hole (12a) and can remain inside the pouch-type secondary battery (10) by the internal space formed by the first adsorption part (130) and the second adsorption part (230).

[0132] Additionally, after step (S4), a step of sealing the area around the venting hole (12a) through the first jig part (100) and the second jig part (200) may be performed. At this time, the first jig part (100) and the second jig part (200) become closer to each other due to the sealing of the venting hole (12a), and the first piercing unit (121) penetrates the venting hole (12a) and is partially inserted into the second hole (222a), and the second piercing unit (221) penetrates the venting hole (12a) and is partially inserted into the first hole (122a).

[0133] The distance between the first jig section (100) and the second jig section (200) can be reduced in the order of step (S1), step (S3), step (S4), step (S2), and the sealing step after step (S4) (d1>d3>d2>d4).

[0134]

[0135] As specific parts of the present invention have been described in detail above, it is obvious to those skilled in the art that such specific descriptions are merely preferred embodiments and do not limit the scope of the invention, and that various changes and modifications are possible within the scope and spirit of the invention, and that such variations and modifications fall within the scope of the appended claims.

[0136] (Explanation of symbols)

[0137] 10: Pouch-type secondary battery

[0138] 11: 1st Pocket Section

[0139] 12: Second pocket section 12a: Venting hole

[0140] 13: Electrode lead

[0141] 100: 1st Jigbu

[0142] 110: First support plate

[0143] 111: First intake channel 112: Second intake channel

[0144] 120: First suction part

[0145] 121: 1st Piercing Unit

[0146] 122: 1st Pad

[0147] 122a: 1st hole

[0148] 122b: First protruding pad

[0149] 122b': 1a protruding pad 122b": 1b protruding pad

[0150] 122c: First fastening hole

[0151] 123: 1st sealing section

[0152] 130: First adsorption part

[0153] 131: 1st suction hole 132: 2nd pad

[0154] 140: 1st suction unit

[0155] 150: 1st adsorption unit

[0156] 200: 2nd Zigbu

[0157] 210: Second support plate

[0158] 211: 3rd intake channel 212: 4th intake channel

[0159] 220: Second suction part

[0160] 221: 2nd Piercing Unit

[0161] 222: 3rd Pad

[0162] 222a: Second hole

[0163] 222b: Second protruding pad

[0164] 222b': 2a protruding pad 222b": 2b protruding pad

[0165] 222c: Second fastening hole

[0166] 223: Second sealing section

[0167] 230: Second adsorption part

[0168] 231: 2nd suction hole 232: 4th pad

[0169] 240: Second intake unit

[0170] 250: Second adsorption unit

[0171] S: Sealing part

Claims

1. A degassing device for removing gas from a pouch-type secondary battery, comprising a first pocket portion for housing an electrode assembly and a second pocket portion for gas collection, A first jig portion located on one side of the second pocket portion and sucking in gas collected in the second pocket portion; and A second jig part positioned to correspond to the first jig part, positioned on the other side of the second pocket part, and sucking in gas collected in the second pocket part; comprising The first jig part comprises a first support plate, a first suction part for sucking gas collected in the second pocket part, and a first adsorption part located below the first suction part and adsorbing the lower side of one surface of the second pocket part. A pouch-type secondary battery degassing device characterized in that the first support plate is formed such that the area where the first suction part is located protrudes toward one side of the second pocket part more than the area where the first adsorption part is located.

2. In Paragraph 1, The above-mentioned first suction part is, A first piercing unit configured to form a venting hole on one surface of the second pocket portion; A first hole is formed in which the first piercing unit is disposed, and a first pad protrudes closer to one surface of the second pocket portion than to one surface of the first support plate; and A pouch-type secondary battery degassing device characterized by including a first sealing part that seals the periphery of the venting hole.

3. In Paragraph 2, A pouch-type secondary battery degassing device characterized by having a first suction passage formed in the first support plate that communicates with the first hole and sucks in gas collected in the second pocket portion.

4. In Paragraph 3, A pouch-type secondary battery degassing device characterized in that the first jig part further includes a first suction unit communicating with the first suction channel.

5. In Paragraph 2, The above first adsorption part is, A plurality of first adsorption holes formed to vacuum adsorb the lower side of one surface of the second pocket portion; and A pouch-type secondary battery degassing device characterized by including: a second pad disposed on one surface of the first support plate to surround the periphery of the plurality of first adsorption holes.

6. In Paragraph 5, The first support plate has a second suction channel formed therein to communicate with the plurality of first suction holes and to vacuum suction the lower side of one surface of the second pocket portion, and A pouch-type secondary battery degassing device characterized in that the first jig part further includes a first adsorption unit communicating with the second suction channel.

7. In Paragraph 2, The above second jig part is, Second support plate; A second suction part for sucking in gas collected in the second pocket part; and It includes a second suction part located below the second suction part and adsorbing the lower side of the other surface of the second pocket part, A pouch-type secondary battery degassing device characterized in that the second support plate is formed such that the area where the second suction part is located protrudes toward the other side of the second pocket part more than the area where the second adsorption part is located.

8. In Paragraph 7, The above second suction part is, A second piercing unit configured to form a venting hole on the other surface of the second pocket portion; A second hole is formed in which the second piercing unit is disposed, and a third pad protrudes closer to the other side of the second pocket portion than to one side of the second support plate; and A pouch-type secondary battery degassing device characterized by including a second sealing part that seals the periphery of the venting hole.

9. In Paragraph 8, A pouch-type secondary battery degassing device characterized by having a third suction passage formed in the second support plate, which communicates with the second hole and sucks in gas collected in the second pocket portion.

10. In Paragraph 9, A pouch-type secondary battery degassing device characterized in that the second jig part further includes a second suction unit communicating with the third suction channel.

11. In Paragraph 7, The above second adsorption part is, A plurality of second adsorption holes formed to vacuum adsorb the lower side of the other surface of the second pocket portion; and A pouch-type secondary battery degassing device characterized by including: a fourth pad disposed on one surface of the second support plate to surround the periphery of the plurality of second adsorption holes.

12. In Paragraph 11, A fourth suction channel (212) is formed in the second support plate to communicate with the plurality of second suction holes and to vacuum suction the lower side of the other surface of the second pocket portion, and A pouch-type secondary battery degassing device characterized in that the second jig part further includes a second adsorption unit communicating with the fourth suction channel.

13. In Paragraph 8, The first sealing portion is formed to protrude toward one side of the second pocket portion, and A pouch-type secondary battery degassing device characterized in that the second sealing portion is formed by being recessed inward so that the first sealing portion is inserted therein.

14. A method for degassing a pouch-type secondary battery using a pouch-type secondary battery degassing device according to any one of claims 1 to 13, wherein (S1) A step of positioning the second pocket portion between the first jig portion and the second jig portion; (S2) A step of forming a venting hole by bringing the first jig part and the second jig part into close contact with the second pocket part; (S3) A step of spreading the second pocket portion to both sides through the first jig portion and the second jig portion; and (S4) A step of inhaling gas collected in the second pocket portion through the first jig portion and the second jig portion; characterized by a pouch-type secondary battery degassing method.

15. In Paragraph 14, A pouch-type secondary battery degassing method characterized by further including, after the above step (S4), a step of sealing the periphery of the venting hole through the first jig part and the second jig part.

Images