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公开(公告)号：US20230411749A1
公开(公告)日：2023-12-21
申请号：US18250952
申请日：2021-10-13
发明人： Dae Kyu KIM , Jong Jun PARK
IPC分类号： H01M50/186 , H01M50/152 , H01M50/342 , H01M50/193
CPC分类号： H01M50/186 , H01M50/152 , H01M50/3425 , H01M50/193
摘要： An embodiment of the present invention relates to a cylindrical secondary battery, comprising: a cylindrical can; an electrode assembly accommodated in the cylindrical can; and a cap assembly. The cap assembly comprises: a cap-up; a cap-down disposed under the cap-up; a vent plate disposed between the cap-up and the cap-down, spaced apart from the cap-down and having at least one notch; and an insulator inserted between the vent plate and the cap-down to insulate the vent plate and the cap-down from each other, wherein the insulator is formed through an injection process, an assembly process, and a cross-linking process, sequentially.
According to an embodiment of the present invention, when the insulator is provided in the cap assembly, since the cross-linking process is performed after fusion, the insulator can be stably coupled to the cap assembly. In addition, since, due to the cross-linking process, the insulator does not melt even in a high-temperature environment, the insulator can maintain the insulating function thereof even in a high-temperature environment.-
公开(公告)号：US20230378595A1
公开(公告)日：2023-11-23
申请号：US18247734
申请日：2021-09-16
发明人： Dae Kyu KIM , Sang Hyo LEE
IPC分类号： H01M50/342 , H01M50/107 , H01M50/152 , H01M50/559 , H01M50/186
CPC分类号： H01M50/3425 , H01M50/107 , H01M50/152 , H01M50/559 , H01M50/186 , H01M2200/20
摘要： The present invention relates to a secondary battery which can easily vent internal gas, thereby enhancing safety. Disclosed as an example is a secondary battery comprising: an electrode assembly; a case in which the electrode assembly is accommodated; and a cap assembly which is coupled to the top of the case and comprises a cap-up having opening, a safety vent provided under the cap-up and having a notch to be ruptured at a predetermined pressure or higher, and a cap-down provided under the safety vent and electrically connected to the electrode assembly, wherein the notch is exposed through the opening.
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公开(公告)号：US20230268620A1
公开(公告)日：2023-08-24
申请号：US18014071
申请日：2022-02-07
发明人： Ho Jae LEE , Dae Kyu KIM , Hyun Ki JUNG , Myung Seob KIM , Won Sug LEE
IPC分类号： H01M50/533 , H01M50/538 , H01M50/107 , H01M50/152
CPC分类号： H01M50/533 , H01M50/538 , H01M50/107 , H01M50/152
摘要： The present invention relates to a secondary battery capable of reducing costs and increasing capacity. For example, disclosed is a secondary battery characterized by comprising: an electrode assembly including a first electrode, a second electrode, and a separator; a case accommodating the electrode assembly; and a cap assembly coupled to the upper portion of the case, wherein the first electrode comprises: a first current collector; a first current collecting tab structure extending from the first current collector and having a plurality of bent current collection parts; and a first lead tab electrically connected to the first current collecting tab structure, wherein, in the first current collecting tab structure, the width of the current collection parts increases from the center of the electrode assembly to the outside, and the distance between the current collection parts increases.
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公开(公告)号：US20230253669A1
公开(公告)日：2023-08-10
申请号：US18003476
申请日：2022-02-09
发明人： Jong Jun PARK , Dae Kyu KIM , Shin Jung KIM , Sung gwi KO
IPC分类号： H01M50/342 , H01M50/152
CPC分类号： H01M50/3425 , H01M50/152 , H01M2200/20
摘要： The present disclosure provides a secondary battery capable of increasing an operation time till a breakdown of a safety vent at a high temperature environment. As an example, disclosed is a secondary battery comprising: a can having a space therein; an electrode assembly accommodated in the space of the can; and a cap assembly for sealing the electrode assembly by blocking the can, wherein the cap assembly comprises a cap-up, a cap-down under the cap-up, and a safety vent between the cap-up and the cap-down, wherein the safety vent comprises a support protrusion formed on a contact surface coupled to the cap-up.
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公开(公告)号：US20230249288A1
公开(公告)日：2023-08-10
申请号：US18300226
申请日：2023-04-13
发明人： Sung Gwi KO , Dae Kyu KIM , Jin Young MOON
IPC分类号： B23K26/323 , B23K26/21 , B23K26/08 , H01M10/0525 , H01M50/171 , H01M50/30 , H01M50/169 , H01M50/167 , H01M50/574
CPC分类号： B23K26/323 , B23K26/21 , B23K26/08 , H01M10/0525 , H01M50/171 , H01M50/30 , H01M50/169 , H01M50/167 , H01M50/574 , B23K2103/18
摘要： The present invention relates to a secondary battery capable of improving the coupling force between a safety vent and a cap-up. For example, disclosed is a secondary battery comprising: an electrode assembly; a case for accommodating the electrode assembly; a cap assembly coupled to the upper part of the case; and a gasket interposed between the cap assembly and the case, wherein the cap assembly includes a cap-up and a safety vent, which is provided at the lower part of the cap-up and has a vent extension part extending to the upper part of the cap-up so as to encompass the edge of the cap-up, a welding region, in which the safety vent and the cap-up are welded and coupled by laser welding, is formed in the vent extension part, and the welding region is formed in a line shape.
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公开(公告)号：US20230223643A1
公开(公告)日：2023-07-13
申请号：US18151400
申请日：2023-01-06
发明人： Shin Jung KIM , Dae Kyu KIM , Jong Jun PARK
IPC分类号： H01M50/342 , H01M50/107 , H01M50/152
CPC分类号： H01M50/3425 , H01M50/107 , H01M50/152 , H01M2200/20
摘要： A secondary battery includes: a cylindrical case; an electrode assembly in the cylindrical case; and a cap assembly configured to seal the cylindrical case and including a cap-down electrically connected to the electrode assembly, a cap-up coupled to an upper portion of the cap-down, and a vent plate between the cap-down and the cap-up, wherein the vent plate includes: a first plate; and a second plate coupled to the outside of the first plate, wherein the first plate has rigidity less than that of the second plate.
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公开(公告)号：US20230040851A1
公开(公告)日：2023-02-09
申请号：US17817259
申请日：2022-08-03
发明人： Dae Kyu KIM , Chang Wook KIM , Sang Hyun KIM , Jong Jun PARK , Kwang Soo SEO , Jeong Chull AHN , Jae Woong WI , Tae Yoon LEE
IPC分类号： H01M10/0587
摘要： A secondary battery, includes an electrode assembly including a first electrode plate, a second electrode plate, and a separator wherein the electrode assembly is wound; a can for accommodating the electrode assembly and an electrolyte; a finishing tape including a film layer comprising a nylon material and an adhesive layer for attaching the film layer to the electrode assembly, wherein the finishing tape at least partially surrounds the electrode assembly; and a cap assembly that seals the can.
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公开(公告)号：US20220285764A1
公开(公告)日：2022-09-08
申请号：US17597470
申请日：2020-06-29
发明人： Dae Kyu KIM , Jin Young MOON , Sung Gwi KO
IPC分类号： H01M50/152 , H01M50/107 , H01M50/186 , H01M50/591 , H01M50/167 , H01M50/578 , H01M50/342
摘要： The present invention relates to a secondary battery, wherein the length of a second bending portion of a safety plate covering an extension portion of a cap-up can be adjusted to prevent deformation of the safety plate and improve the sealing force of the secondary battery, even when a crimping part having a flat upper structure in which the sealing force can deteriorate due to the low compression rate of an insulating gasket is used. For example, disclosed is a secondary battery comprising: a cylindrical can; an electrode assembly which, together with an electrolyte, is accommodated in the cylindrical can; a cap assembly coupled to an upper portion of the cylindrical can; and an insulating gasket interposed between the cap assembly and the cylindrical can. The cap assembly comprises: a cap-up; and a safety plate which is installed below the cap-up and has a second bending portion that surrounds an extension portion of an edge of the cap-up and covers a portion of the upper surface of the extension portion. A second length, which is the length of the second bending portion, has any one value between 50% to 54%, inclusive, of a first length, which is the length of the extension portion.
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公开(公告)号：US20170194620A1
公开(公告)日：2017-07-06
申请号：US15391881
申请日：2016-12-28
发明人： Dae Kyu KIM
摘要： A secondary battery includes an electrode assembly, a cap assembly, and a case. The electrode assembly includes a separator between a first electrode and a second electrode. The cap assembly is electrically connected to the first electrode. The case accommodates the electrode assembly and includes an opening to which the cap assembly is coupled. The cap assembly includes a cap and a current interruptor. The cap is outside the case and serves as a terminal of the first electrode. The current interruptor is between the cap and the first electrode. The current interruptor breaks an electric connection between the cap and the first electrode at a preset pressure or higher. The cap surrounds an edge portion of the current interruptor.
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