Patent Application
20250079585
This application claims the priority of Korean Patent Application Nos. 10-2023-0117851, filed on Sep. 5, 2023, and 10-2024-0071802, filed on May 31, 2024, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.
The present disclosure relates to a secondary battery, and more particularly, to a secondary battery that is chargeable and dischargeable, a method for preparing the same, and a battery pack.
In recent years, the price of energy sources increases due to the depletion of fossil fuels, the interest in environmental pollution is amplified, and the demand for eco-friendly alternative energy sources is becoming an indispensable factor for future life. Accordingly, studies on various power generation technologies such as solar power, wind power, and tidal power are continuing, and power storage devices such as batteries for more efficiently using the generated electrical energy are also of great interest.
Furthermore, as technology development and demand for electronic mobile devices and electric vehicles using batteries increase, the demands for batteries as energy sources are rapidly increasing. Thus, many studies on batteries which are capable of meeting various demands have been conducted.
Batteries storing electrical energy may be generally classified into primary batteries and a secondary batteries. Such a primary battery is a disposable consumable battery. On the other hand, such a secondary battery is a chargeable battery that is manufactured by using a material in which oxidation and reduction processes between current and the material are capable of being repeated. That is, when the reduction reaction to the material is performed by the current, power is charged. When the oxidation reaction to the material is performed by the current, power is discharged. Such charging-discharging are repeatedly performed to generate electricity.
Secondary batteries may be classified into cylindrical cells, pouch cells, and prismatic cells according to their shape. Among them, such a pouch cell may be manufactured by accommodating an electrode assembly in the form of a stack of a positive electrode, a negative electrode, a separator, etc. inside a pouch and then sealing an outer portion of the pouch.
Secondary batteries may be classified into cylindrical cells, pouch cells, and prismatic cells according to their shape. Among them, such a pouch cell may be manufactured by accommodating an electrode assembly in the form of a stack of a positive electrode, a negative electrode, a separator, etc. inside a pouch and then sealing an outer portion of the pouch.
The pouch cell according to the related art may have a limitation of cracks occurring in a pouch film in a process of molding the pouch film, and may pouch films are discarded after a degassing process. In addition, a moldable depth is limited depending on material characteristics of the pouch film, and thus there is a limit to increase in battery capacity.
Thus, there is a need for a type of secondary battery that is capable of improving the battery capacity while having relatively few restrictions in shape.
The background description provided herein Is for the purpose of generally presenting context of the disclosure. Unless otherwise indicated herein, the materials described in this section are not prior art to the claims in this application and are not admitted to be prior art, or suggestions of the prior art, by inclusion in this section.
An aspect of the present disclosure provides a secondary battery in which battery capacity is improved while having relatively few restriction in shape, an amount of moisture introduced from the outside is reduced, and structural stability is improved.
According to an aspect of the present disclosure, there is provided a secondary battery including: an electrode assembly; an exterior film surrounding a portion of the electrode assembly; and a cap covering a remaining portion of the electrode assembly, wherein the cap includes: a connection part coupled to the exterior film; and a terminal part coupled to the connection part, exposed to each of the inside and outside of the connection part, and electrically connected to the electrode assembly at a portion thereof, which is exposed to the inside of the connection part, wherein at least a portion of the terminal part is embedded into the connection part.
The terminal part may include: a first member exposed to the outside of the connection part; and a second member extending from the first member toward the electrode assembly.
The second member may be provided so that one end toward the electrode assembly is exposed to the inside of the connection part.
The second member may be provided in plural, and at least one second member may be provided so that one end toward the electrode assembly is exposed to the inside of the connection part.
The secondary battery may further include a busbar disposed between the terminal part and the electrode assembly to connect the one end of the second member, which is exposed to the inside of the connection part, to the electrode assembly.
The second member may extend from a side portion of the first member toward the electrode assembly and be embedded into the connection part so as to be covered by the connection part, and the terminal part may further include a third member extending from the first member toward the electrode assembly and provided to pass through the connection part so as to be exposed to the inside of the connection part.
The secondary battery may further include a busbar disposed between the terminal part and the electrode assembly to connect the third member, which is exposed to the inside of the connection part, to the electrode assembly.
The busbar may include: a first metal part that is in contact with the third member; and a second metal part which extends from the first metal part toward the electrode assembly and of which one end is connected to the electrode assembly.
The busbar may include: a first metal part that is in contact with the third member; a second metal part extending from the first metal part toward the electrode assembly; a third metal part extending from the second metal part toward the exterior film; and a fourth metal part which extends from the third metal part toward the electrode assembly and of which one end is connected to the electrode assembly.
The third member may include a metal material, and the third member and the busbar may be coupled to each other by welding.
The terminal part may be disposed to protrude in a direction, which is away from the electrode assembly, from one surface of the connection part.
In the cap, one surface of the connection part may be disposed on the same surface as one surface of the terminal part.
The terminal part may include a metal material, the connection part may include a resin material having adhesive properties by heat, and the terminal part and the connection part may be coupled to each other by heat and a pressure.
The connection part and the terminal part may be coupled to each other by an adhesive applied between the connection part and the terminal part.
The connection part may include a metal material, and the exterior film may include a metal layer coupled to the connection part by welding.
The exterior film may include a sealant layer having adhesive properties by heat and a barrier layer, wherein the barrier layer may include one or more materials selected from the group consisting of iron (Fe), carbon (C), chromium (Cr), manganese (Mn), nickel (Ni), aluminum (Al), stainless steel (STS), and an alloy thereof.
The connection part may include a resin material having adhesive properties by heat, and the exterior film may include a resin layer coupled to the connection part by heat and a pressure.
In the secondary battery, the exterior film and the connection part may be coupled to each other by an adhesive applied between the exterior film and the connection part.
The exterior film may include a bendable film.
The exterior film may include a bendable film having no elasticity.
According to another aspect of the present disclosure, there is provided a method for preparing a secondary battery, the method including: providing an electrode assembly including a positive electrode and a negative electrode; surrounding a portion of the electrode assembly by an exterior film; and covering a remaining portion of the electrode assembly by a cap, wherein the cap includes: a connection part coupled to the exterior film; and a terminal part coupled to the connection part, exposed to each of the inside and outside of the connection part, and electrically connected to the electrode assembly at a portion of the inside of the connection part, and wherein at least a portion of the terminal part is embedded into the connection part.
According to another aspect of the present disclosure, there is provided a battery pack including: a plurality of the secondary batteries as described above; and a packaging accommodating the plurality of the secondary batteries.
The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily carry out the present disclosure. However, the present disclosure may be implemented in several different forms and is not limited or restricted by the following examples.
In order to clearly explain the present disclosure, detailed descriptions of portions that are irrelevant to the description or related known technologies that may unnecessarily obscure the gist of the present disclosure have been omitted, and in the present specification, reference symbols are added to components in each drawing. In this case, the same or similar reference numerals are assigned to the same or similar elements throughout the specification.
Also, terms or words used in this specification and claims should not be restrictively interpreted as ordinary meanings or dictionary-based meanings, but should be interpreted as meanings and concepts conforming to the scope of the present disclosure on the basis of the principle that an inventor can properly define the concept of a term to describe and explain his or her invention in the best ways.
The secondary battery 10 according to Embodiment 1 of the present disclosure may include an electrode assembly 100, an exterior film 200, and a cap 300. Hereinafter, each configuration of the secondary battery 10 will be described in more detail. For reference, contents of Embodiment 1 may be equally applied to embodiments described later, as long as there is no conflict.
The electrode assembly 100 of the secondary battery 10 may include a positive electrode, a negative electrode, and a separator. Here, the separator may be disposed between the positive electrode and the negative electrode to physically separate the positive electrode from the negative electrode. The electrode assembly 100 may be provided in a form in which the positive electrode, the negative electrode, and the separator are stacked, or a jelly-roll form in which the positive electrode, a negative electrode, and a separator are wound.
The electrode assembly 100 may include an electrode tab 110 connected to the electrode. The electrode tab 110 may be provided separately or may be provided as a portion of a current collector constituting the electrode. For reference, if the electrode assembly 100 is an all-solid-state battery, a solid electrolyte may be provided instead of the separator.
Referring to
In order to surround the electrode assembly 100, the exterior film 200 may be made of a material of which a shape is deformable. For example, the exterior film 200 may be bendable.
In addition, the exterior film 200 may be made of a non-elastic material. In the related art, a pouch film is molded to define a space in which the electrode assembly is accommodated. However, since the exterior film 200 does not need to deform its shape through the molding, the exterior film 200 may be made of a non-elastic material. That is, the exterior film 200 may not have elasticity.
The exterior film 200 of the secondary battery 10 may have a shape in which a sheet or film is rolled along a side surface of the electrode assembly 100. That is, the exterior film 200 may be disposed to surround a side portion of the electrode assembly 100. Here, one end and the other end of the exterior film 200 may be disposed to meet each other and surround the electrode assembly 100. In relation to the form in which the one end and the other end of the exterior film 200 meet each other, it is possible to couple one surface of the one end to the other surface of the other end so that the one surface and the other surface are in contact with each other (see
Regarding the method by which one end and the other end of the exterior film 200 are coupled to each other, one end and the other end of the exterior film 200 may be coupled to each other by sealing by heat or sealing by heat and a pressure. That is, the exterior film 200 may include a material that has sealing properties by heat. Specifically, the exterior film 200 may include a material that is melted by the heat and has adhesive properties.
For example, the exterior film 200 may include a sealant layer, a barrier layer, and an insulating layer.
The sealant layer may include at least one or more materials selected from the group consisting of polyethylene, polypropylene, polycarbonate, polyethylene terephthalate, polyvinyl chloride, acrylic polymer, polyacrylonitrile, polyimide, polyamide, cellulose, aramid, nylon, polyester, polyparaphenylene benzobisoxazole, polyarylate, teflon, and glass fiber. Mainly, a polyolefin-based resin such as polypropylene (PP) or polyethylene (PE) may be used. Particularly, polypropylene (PP) may have excellent mechanical properties such as tensile strength, rigidity, surface hardness, wear resistance, and heat resistance, and chemical properties such as corrosion resistance. The barrier layer may include one or more materials selected from the group consisting of iron (Fe), carbon (C), chromium (Cr), manganese (Mn), nickel (Ni), aluminum (Al), stainless steel (STS), and an alloy thereof.
For example, the exterior film 200 may include at least one or more materials selected from the group consisting of polyethylene, polypropylene, polycarbonate, polyvinyl chloride, acrylic polyethylene terephthalate, polymer, polyacrylonitrile, polyimide, polyamide, cellulose, aramid, nylon, polyester, polyparaphenylene benzobisoxazole, polyarylate, teflon, and glass fiber.
The exterior film 200 may be disposed to surround a portion of the electrode assembly 100, and the cap 300 may be disposed to surround a remaining portion of the electrode assembly 100. Specifically, when the exterior film 200 is disposed to surround the electrode assembly 100 along the side surface of the electrode assembly 100, an exterior opening may be defined at each of both ends of the electrode assembly 100. The cap 300 of the secondary battery 10 may be coupled to the exterior film 200 in a form that covers the exterior opening at each of both the ends of the electrode assembly 100, and the electrode assembly 100 may be accommodated in the internal space defined by the exterior film 200 and the cap 300.
As an example of a method for coupling the cap 300 to the exterior film 200, the cap 300 and the exterior film 200 may be coupled to each other by welding. Specifically, the connection part 310 may include a metal material, and the exterior film 200 may include a metal layer, which is capable of being coupled to the connection part 310 by welding, at a portion facing the connection part 310.
As another example of a method of coupling the cap 300 to the exterior film 200, the cap 300 and the exterior film 200 may be coupled to each other by sealing. Specifically, the connection part 310 may include a resin material that has adhesive properties by heat, and the exterior film 200 may include a resin layer, which is capable of being coupled to the connection part 310 by heat and a pressure, at a portion facing the connection part 310. Here, the resin layer may include a material having sealing properties by heat as described above.
In the pouch cell according to the related art, a cup part that accommodates the electrode assembly 100 may be molded by molding a sheet or film. During the molding process of the cup part, a moldable depth may be limited depending on the material characteristics of the sheet or film, and the capacity at which the electrode assembly 100 is accommodated may also be limited. In addition, when molding the sheet or film, a thickness at a corner is the thinnest, which often resulted in defects such as cracks. In addition, the pouch cell according to the related art may require a gas collection part to collect a gas during the degassing process so as to remove the gas accumulated inside the pouch, and a large portion of the gas collection part may be removed and discarded after the degassing process.
On the other hand, in the secondary battery 10 according to Embodiment 1 of the present disclosure, the exterior film 200 may be used to match a volume of the electrode assembly 100, and thus, a limit to the capacity at which the electrode assembly 10 is accommodated may not occur. In addition, since there is no need for molding the cup part, it is possible to prevent defects such as cracks from occurring in the exterior film 200, and the material and thickness of the exterior film 200 may be relatively freely selected. In addition, since the electrolyte injection and the degassing process can be carried out through the cap 300, economic efficiency of the process may be improved because the exterior film 200 that needs to be discarded after degassing process is not necessary.
Although not described in detail in the present disclosure, the cap 300 may further include an electrolyte injection port for injecting an electrolyte or a gas discharge port for discharging the gas in the degassing process.
Referring to
The connection part 310 of the cap 300 may be coupled to the exterior film 200. In addition, the terminal part 320 of the cap 300 may be coupled to the connection part 310 and may be exposed to the outside and inside of the connection part 310. Here, the inside of the connection part 310 may refer to a portion of the internal space defined by the cap 300 and the exterior film 200, and the outside of the connection part 310 may refer to an external space of the cap 300 and the exterior film 200. A portion of the terminal part 320 exposed to the inside of the connection part 310 may be electrically connected to the electrode assembly 100. Here, the electrical connection may include both direct connection between the terminal part 320 and the electrode assembly 100 and indirect connection through another electrically conductive member.
As an example of the method for coupling the connection part 310 to the terminal part 320, coupling by sealing may be possible. The terminal part 320 may include a metal material, and the connection part 310 may include a resin material that has adhesive properties by heat. Thus, the resin material of the adhesive connection part 310 may be melted by heat and coupled to the terminal part 320 by a pressure.
As an example of a configuration to improve structural stability of the cap 300, at least a portion of the terminal part 320 of the cap 300 according to Embodiment 1 of the present disclosure may be embedded in the connection part 310. In this regard, the terminal part 320 of the cap 300 may include a first member 321 and a second member 322.
A portion of the first member 321 of the terminal part 320 may be exposed to the outside of the connection part 310. Thus, the terminal part 320 electrically connected to the electrode assembly 100 may be in electrical contact with the outside through the first member 321 exposed to the outside of the connection part 310. That is, the secondary battery 10 may provide electrical energy to the outside through the first member 321.
The second member 322 of the terminal part 320 may extend toward the electrode assembly 100. That is, the second member 322 may extend from the first member 321 toward the electrode assembly 100. Specifically, the second member 322 may be provided so that one end toward the electrode assembly 100 is exposed to the inside of the connection part 310. Here, the inside of the connection part 310 may refer to a portion of the internal space defined by the exterior film 200 and the cap 300.
Referring to
One end of the second member 322 extending to the inside of the connection part 310 toward the electrode assembly 100 may be electrically connected to the electrode assembly 100. Here, the electrical connection may include both direct connection between the second member 322 and the electrode assembly 100 and indirect connection through another electrically conductive member.
When the second member 322 and the electrode assembly 100 are directly connected to each other, the electrode tab 110 of the electrode assembly 100 may be connected to the second member 322. In addition, when the second member 322 and the electrode assembly 100 are indirectly connected to each other, the secondary battery 10 may include a busbar 400 as an example of an electrically conductive member serving as a medium.
The busbar 400 may be disposed between the terminal part 320 and the electrode assembly 100 to connect one end of the second member 322 exposed to the inside of the connection part 310 to the electrode assembly 100. The busbar 400 may be made of a metal to have electrical conductivity. In addition, the busbar 400 may be disposed in various shapes depending on a length of the second member 322, etc.
According to a modified example of Embodiment 1 of the present disclosure, the second members 322 may be provided so that one end toward the electrode assembly 100 is exposed to the inside of the connection part 310. Specifically, all of the plurality of second members 322 extending from the first member 321 toward the electrode assembly 100 may be exposed to the inside of the connection part 310.
As described above, when the second member 322 and the electrode assembly 100 are directly connected to each other, the electrode tab 110 of the electrode assembly 100 may be connected to the second member 322. In addition, when the second member 322 and the electrode assembly 100 are indirectly connected to each other, the secondary battery 10 may include a plurality of busbars 400 as an example of an electrically conductive member serving as a medium.
Referring to
The cap 300 according to Embodiment 1 of the present disclosure may be disposed so that one surface of the terminal part 320 protrudes from one surface of the connection part 310 in a direction away from the electrode assembly 100. Specifically, one surface of the first member 321 may be disposed to protrude outward from the connection part 310 more than one surface of the connection part 310. Based on
As another example related to the arrangement of the first member 321, one surface of the first member 321 may be disposed on the same surface as one surface of the connection part 310. In this case, since there is no portion of the first member 321 that protrudes to the outside of the connection part 310, an arrangement of a plurality of secondary batteries 10 may be easy.
In the cap 300 of the secondary battery 10 according to Embodiment 1 of the present disclosure, the connection part 310 and the terminal part 320 of which at least a portion is embedded in the connection part 310 may cover the electrode assembly 100. Depending on the material of the connection part 310, moisture on the outside of the connection part 310 may be permeated into the connection part 310 through the connection part 310. The permeation of the moisture may cause defects in the secondary battery 10. In the cap 300 of the secondary battery 10 according to Embodiment 1 of the present disclosure, the terminal part 320 made of a metal together with the connection part 310 may cover the electrode assembly 100, and thus, an area of the connection part 310 through which the moisture is permeated may be reduced. In addition, since at least a portion of the terminal part 320 is disposed in a shape of being embedded in the connection part 310, a moisture permeation path provided between the terminal part 320 and the connection part 310 may be difficult for moisture to be permeated. Thus, the secondary battery 10 according to Embodiment 1 of the present disclosure may reduce an amount of moisture permeated into the interior to reduce a limitation in performance of the secondary battery 10.
In addition, the cap 300 of the secondary battery 10 according to Embodiment 1 of the present disclosure may be disposed in a state in which the second member 322 of the terminal part 320 is embedded in the connection part 310. Thus, since the connection part 310 restricts movement of the terminal part 320 to prevent the terminal part 320 from being separated, the structural stability of the secondary battery 10 may be improved.
Although not described in detail in Embodiment 1 of the present disclosure, the cap 300 may further include a gas discharge member (not shown) that discharges a gas inside the secondary battery 10 or a venting member (not shown) that induces venting in a specific direction.
Hereinafter, a detailed description of the same configuration as that of the busbar assembly 10 according to Embodiment 1 of the present disclosure will be omitted, and the description will focus on the differences. The secondary battery 10 according to Embodiment 2 of the present disclosure may be different from the secondary battery 10 according to Embodiment 1 in a shape of a terminal part 320′, a shape of the busbar 400′, and a coupling method of the configurations.
The secondary battery 10 according to Embodiment 2 of the present disclosure may include an electrode assembly 100, an exterior film 200, and the cap 300′. The exterior film 200 of the secondary battery 10 may be provided to surround a portion of the electrode assembly 100. Specifically, the exterior film 200 may be provided to surround the cap 300′ and the electrode assembly 100. More specifically, the exterior film 200 may be coupled to the cap 300 to define an internal space, and the electrode assembly 100 may be accommodated in the internal space.
The cap 300′ of the secondary battery 10 may include a connection part 310 and a terminal part 320′. The connection part 310 of the cap 300′ may be coupled to the exterior film 200, and the terminal part 320′ of the cap 300′ may be coupled to the connection part 310 so as to be exposed to each of the outside and inside of the connection part 310. Here, the inside of the connection part 310 may refer to a portion of the internal space defined by the cap 300′ and the exterior film 200, and the outside of the connection part 310 may refer to an external space of the cap 300′ and the exterior film 200. A portion of the terminal part 320′ exposed to the inside of the connection part 310 may be electrically connected to the electrode assembly 100.
As an example of a configuration for efficient electrical connection to the electrode assembly 100, the terminal part 320′ of the cap 300′ according to Embodiment 2 of the present disclosure may further include a third member 323.
Referring to
Since the third member 323 is electrically connected to the electrode assembly 100, all of the second members 322 may be disposed to be embedded in the connection part 310. Here, the second member 322 may extend from a side portion of the first member 321 toward the electrode assembly 100. The second member 322 may be disposed along an edge of the first member 321. Since all of the second members 322 disposed along the edge of the first member 321 are disposed to be embedded in the connection part 310, the structural stability of the cap 300′ may be improved. In this case, a path through which moisture is relatively difficult to be permeated may be provided between the connection part 310 and the terminal part 320 to effectively prevent moisture from being permeated into the interior of the secondary battery 10. This is only an example, and the second member 322 may be provided only on a pair of opposite edges of four edges of the first member 321, which has an approximately rectangular cross-section.
As an example of a configuration for electrically connecting the third member 323 to the electrode assembly 100, the secondary battery 10 according to Embodiment 2 of the present disclosure may further include a busbar 400′. Specifically, the busbar 400′ may be disposed between the terminal part 320′ and the electrode assembly 100 to connect the third member 323 exposed to the inside of the connection part 310 to the electrode assembly.
As an example of a configuration for efficient connection to the third member 323, the busbar 400′ according to Embodiment 2 of the present disclosure may include a first metal part 410, a second metal part 420, a third metal part 430, and a fourth metal part 440.
Referring to
The second metal part 420 may extend from the first metal part 410 toward the electrode assembly 100. Here, the second metal part 420 may extend in a direction substantially perpendicular to the direction in which the first metal part 410 extends.
The third metal part 430 may extend from the second metal part 420 toward the exterior film 200. Here, the third metal part 430 may extend in a direction substantially perpendicular to a direction in which the second metal part 420 extends. Specifically, the third metal part 430 may extend in a direction away from the third member 323.
The fourth metal part 440 may extend from the third metal part 430 toward the electrode assembly 100. In addition, one end of the fourth metal part 440 may be connected to the electrode assembly 100. Specifically, one end of the fourth metal part 440 may be connected to the electrode tab 110 of the electrode assembly 100.
The busbar 400′ including the first metal part 410, the second metal part 420, the third metal part 430, and the fourth metal part 440 may be changed in various shapes depending on the number, arrangement, shape, etc. of the electrode assembly 100.
Referring to
An adhesive 500 may be used as a component for coupling between the connection part 310 and the terminal part 320′. That is, the connection part 310 and the terminal part 320′ may be coupled to each other by the adhesive 500 applied between the connection part 310 and the terminal part 320′. In addition, the connection part 310 and the exterior film 200 may also be coupled to each other through the adhesive 500 applied between the connection part 310 and the exterior film 200. Here, the type and application form of the adhesive 500 for coupling may vary. The adhesive 500 may be made of a material with relatively high hydrophobicity.
The battery pack 1 according to Embodiment 3 of the present disclosure may include a plurality of secondary batteries 10. In addition, the battery pack 1 may include a packaging (housing) 20 that accommodates the plurality of secondary batteries 10 therein.
The packaging 20 may have various shape. For example, the packaging 20 may include a busbar electrically connected to the plurality of secondary batteries 10. Here, the packaging 20 may further include a busbar frame that fixes the bus bar.
The number of secondary batteries 10 accommodated inside the packaging 20 may vary depending on the battery pack 1.
In the secondary battery according to the embodiment of the present disclosure, since there is no process of molding the exterior film, there may be few restriction on the form in which the exterior film accommodates the electrode assembly, and the possibility of the detects such as the cracks in the exterior film may be reduced to improve the battery capacity.
In addition, the degree of permeation of moisture from the outside of the secondary battery into the secondary battery may be reduced to improve the safety of the secondary battery.
In addition, the terminal part may be electrically connected to the electrode assembly in the various forms by the busbar.
In addition, the structural stability of the secondary battery may be improved by the coupling relationship and arrangement of the terminal part and the connection part.
In addition, since at least a portion of the terminal part is disposed embedded in the connection part, the structural stability of the cap may be improved.
The effects of the prevent disclosure are not limited by the aforementioned description, and thus, more varied effects are involved in this specification.
While the present disclosure has been shown and described in connection with the exemplary embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2023-0117851 | Sep 2023 | KR | national |
| 10-2024-0071802 | May 2024 | KR | national |
