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公开(公告)号：EP4231428A1
公开(公告)日：2023-08-23
申请号：EP21883029.7
申请日：2021-09-16
发明人： KIM, Dae Kyu
IPC分类号： H01M50/342 , H01M50/578 , H01M50/152 , H01M50/166
摘要： The present invention relates to a secondary battery which can ensure sealing capability. 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, a safety vent provided under the cap-up and having a vent extension portion extending to the top of the cap-up so as to cover the edge of the cap-up, and a cap-down provided under the safety vent and electrically connected to the electrode assembly, wherein the vent extension portion has a welded area formed by welding the cap-up and the safety vent to each other, and the welded area is spaced apart from the end of the case.
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公开(公告)号：EP3951915A1
公开(公告)日：2022-02-09
申请号：EP20782349.3
申请日：2020-03-11
发明人： KIM, Dae Kyu , KO, Sung Gwi
摘要： The present invention relates to a secondary battery, wherein an electrode tab of an electrode assembly and a pack tab for modularization are electrically connected by a cap-up without any other configuration, so as to reduce resistance and heat generation, which may occur on a current path. For this purpose, a secondary battery is disclosed, the secondary battery including: a cylindrical can having an upper end opening; an electrode assembly received in the cylindrical can and having an electrode tab; and a cap assembly for sealing the upper end opening of the cylindrical can. The cap assembly includes: a circular-plate-shaped safety plate having a bent which is broken when the pressure inside the cylindrical can increases; and a cap-up disposed on the upper portion of the safety plate and surrounding the edge portion of the safety plate, and the electrode tab is in contact with and coupled to the cap-up.
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公开(公告)号：EP3726616A1
公开(公告)日：2020-10-21
申请号：EP17934378.5
申请日：2017-12-14
发明人： KIM, Dae Kyu , KO, Sung Gwi , KIM, Shin Jung , CHUN, Byoung Min
摘要： The present invention provides a cylindrical secondary battery which can have increased safety and capacity, and enhanced scratch resistance and pressure resistance on an external contact surface. To this end, a cylindrical secondary battery is disclosed, the battery comprising: a cylindrical case; an electrode assembly received in the case; and a cap assembly for sealing the case, wherein the cap assembly comprises a top plate having a notch formed on at least one surface thereof, a middle plate coupled to the top plate and including a first through-hole formed through the center thereof, and a bottom plate electrically connected with the electrode assembly and coupled to the top plate through the first through-hole of the middle plate, and includes a surface-treated region formed by surface-treating a surface of the top plate so as to have a concave-convex structure.
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公开(公告)号：EP4262010A1
公开(公告)日：2023-10-18
申请号：EP23167088.6
申请日：2023-04-06
发明人： KIM, Dae Kyu
IPC分类号： H01M50/593 , H01M10/0568 , H01M10/0569 , H01M10/0587 , H01M50/107 , H01M50/152 , H01M50/30 , H01M50/474 , H01M50/477 , H01M50/483 , H01M50/486 , H01M50/491
摘要： A secondary battery includes: a cylindrical can; an electrode assembly in the cylindrical can with an electrolyte, the electrode assembly including a cathode and an anode; a cap assembly coupled to a top of the cylindrical can; and a plate-shaped upper insulating plate between the electrode assembly and the cap assembly. The upper insulating plate includes: a main layer having a plurality of pores extending between an upper surface and a lower surface thereof; and an auxiliary layer adhered to at least one surface of the main layer and partially melted by the electrolyte.
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公开(公告)号：EP4210139A2
公开(公告)日：2023-07-12
申请号：EP23150630.4
申请日：2023-01-06
发明人： KIM, Shin Jung , KIM, Dae Kyu , PARK, Jong Jun
IPC分类号： H01M10/04 , H01M50/152 , H01M50/342
摘要： The present disclosure provides a secondary battery capable of improving safety by discharging internal gas while preventing deformation of a cap plate including a vent unit when pressure inside the case increases. In an example, disclosed is a secondary battery comprising: a cylindrical case; an electrode assembly accommodated in the cylindrical case; and a cap plate electrically connected to the electrode assembly and sealing the cylindrical case, wherein the cap plate includes a first flat portion that is located at the center, a second flat portion that is located outside the first flat portion, and a vent portion that is located between the first flat portion and the second flat portion and has a smaller thickness than the thickness of the first or second flat portion.
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公开(公告)号：EP3998676A1
公开(公告)日：2022-05-18
申请号：EP20836287.1
申请日：2020-06-29
发明人： KIM, Dae Kyu , MOON, Jin Young , KO, Sung Gwi
IPC分类号： H01M50/572 , H01M50/147 , H01M50/183 , H01M50/20
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：EP3731321A1
公开(公告)日：2020-10-28
申请号：EP17935545.8
申请日：2017-12-18
发明人： KIM, Dae Kyu
IPC分类号： H01M10/04 , H01M10/0587
摘要： Disclosed are a finishing tape which is capable of reducing flow of an electrode assembly in a casing and a secondary battery including the same. As an example, disclosed is a finishing tape comprising: a first layer formed of a resin and forming a substrate; and a second layer formed on at least one side of the first layer and including a microsphere structure.
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公开(公告)号：EP3726623A1
公开(公告)日：2020-10-21
申请号：EP17934972.5
申请日：2017-12-13
发明人： KO, Sung Gwi , KIM, Dae Kyu
摘要： The present invention relates to a secondary battery which is capable of improving safety. As an example, a secondary battery which comprises an electrode assembly; a case which accommodates the electrode assembly; a cap assembly which is coupled to an upper portion of the case, and a gasket which is interposed between the cap assembly and the case, wherein the cap assembly comprises a cap-up, a safety vent which is installed at a lower portion of the cap-up, a cap-down which is installed at a lower portion of the safety vent, an insulator which is interposed between the safety vent and the cap-down, and a sub-plate which is located on a lower surface of the cap-down, and an insulation layer is formed on one surface of the safety vent, is disclosed.
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公开(公告)号：EP4311012A1
公开(公告)日：2024-01-24
申请号：EP22771604.0
申请日：2022-02-07
发明人： LEE, Ho Jae , KIM, Dae Kyu , JUNG, Hyun Ki , KIM, Myung Seob , LEE, Won Sug
IPC分类号： H01M50/533 , H01M50/538 , H01M10/04
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：EP4311005A1
公开(公告)日：2024-01-24
申请号：EP22771608.1
申请日：2022-02-09
发明人： PARK, Jong Jun , KIM, Dae Kyu , KIM, Shin Jung , KO, Sung Gwi
IPC分类号： H01M50/342 , H01M50/152
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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