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公开(公告)号：US20240241188A1
公开(公告)日：2024-07-18
申请号：US18393683
申请日：2023-12-22
申请人： SK On Co., Ltd.
发明人： Ji Won NA , Jae Ram KIM , Sang Won BAE , Ji Hee BAE , Yeon Hwa SONG , Ki Joo EOM , Myung Ro LEE , Jae Yeong LEE , Hyun Joong JANG
IPC分类号： G01R31/396 , G01R31/3842 , H01M10/42 , H02J7/00
CPC分类号： G01R31/396 , G01R31/3842 , H01M10/4285 , H02J7/0048
摘要： An apparatus and method for detecting a defective battery cell is proposed. The proposed apparatus includes a charger for supplying current to cause a battery cell to maintain a constant voltage, a measurement part for measuring the voltage and current of the battery cell, and a controller for determining whether a defect exists in the battery cell on the basis of the current measured by the measurement part, whereby the defective battery cell may be detected with high accuracy, a time required for the detection may be shortened, and a space required for the detection may also be reduced.
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2.发明公开公开(公告)号：US20230246169A1
公开(公告)日：2023-08-03
申请号：US18163705
申请日：2023-02-02
申请人： SK ON CO., LTD.
发明人： Yong Seok LEE , Jae Ram KIM , Sang Won BAE , Yeon Hwa SONG , Ki Joo EOM , Myung Ro LEE , Jae Yeong LEE , Hyun Joong JANG
IPC分类号： H01M4/36 , H01M4/38 , H01M4/583 , H01M4/485 , H01M10/052
CPC分类号： H01M4/364 , H01M4/386 , H01M4/583 , H01M4/485 , H01M10/052 , H01M2004/027
摘要： An anode active material for a lithium secondary battery according to embodiments of the present invention includes a carbon-based active material and a silicon-based active material including silicon-based active material particles having a particle size distribution in a range from 1 μm to 19 μm. A lithium secondary battery having improved life-span and rapid charge/discharge properties at room temperature is provided.
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公开(公告)号：US20240266507A1
公开(公告)日：2024-08-08
申请号：US18540880
申请日：2023-12-15
申请人： SK ON CO., LTD.
发明人： Hyun Joong JANG , Jae Ram KIM , Ki Joo EOM , Yong Seok LEE
CPC分类号： H01M4/366 , H01M4/133 , H01M4/364 , H01M4/483 , H01M4/587 , H01M4/622 , H01M4/625 , H01M2004/021 , H01M2004/027
摘要： According to an embodiment, a lithium secondary battery substantially suppressing volume expansion of a silicon-based active material and having excellent characteristics such as capacity, lifespan, and the like is provided. An anode for the lithium secondary battery includes a current collector; a first anode mixture layer on at least one surface of the current collector; and a second anode mixture layer on the first anode mixture layer, wherein the first anode mixture layer and the second anode mixture layer include a carbon-based active material, respectively, the second anode mixture layer includes a silicon-based active material, and an upper and lower layer unit capacity ratio (Ruc) is 1.1 or more.
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公开(公告)号：US20240339666A1
公开(公告)日：2024-10-10
申请号：US18623031
申请日：2024-04-01
申请人： SK ON CO., LTD.
发明人： Jae Yeong LEE , Jae Ram KIM , Ji Won NA , Sang Won BAE , Ji Hee BAE , Yeon Hwa SONG , Ki Joo EOM , Myung Ro LEE , Yong Seok LEE , Hyun Joong JANG
IPC分类号： H01M10/0569 , H01M4/131 , H01M4/133 , H01M4/525 , H01M4/587 , H01M10/052 , H01M10/0568
CPC分类号： H01M10/0569 , H01M4/131 , H01M4/133 , H01M4/525 , H01M4/587 , H01M10/052 , H01M10/0568 , H01M2300/004
摘要： A lithium secondary battery includes a cathode including a cathode active material that includes a lithium metal oxide, an anode facing the cathode and including an anode electrode active material that includes a graphite-based active material and a silicon-carbon composite, and an electrolyte solution including a lithium salt and an organic solvent, the lithium salt including lithium bis(fluorosulfonyl)imide (LiFSI) and the organic solvent including an acetate-based solvent. A content of the silicon-carbon composite is in a range from 5 wt % to 12 wt % based on a total weight of the anode active material.
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5.发明公开公开(公告)号：US20240154110A1
公开(公告)日：2024-05-09
申请号：US18457074
申请日：2023-08-28
发明人： Yong Seok LEE , Jeong Hoon JEUN , Jae Ram KIM , Jae Yun MIN , Ki Joo EOM , Myung Ro LEE , Hyun Joong JANG , Je Nam CHOI
IPC分类号： H01M4/525 , H01M4/62 , H01M10/052
CPC分类号： H01M4/525 , H01M4/625 , H01M4/626 , H01M10/052 , H01M2004/028
摘要： Cathodes and lithium secondary batteries including the cathodes are disclosed. In some implementations, a cathode may include a cathode current collector and a cathode active material layer disposed on the cathode current collector and including cathode active material particles such that the cathode active material layer satisfies a specific equation. The cathode active material particles may include lithium metal oxide particles that include nickel, and may have a mole fraction of cobalt of 0.02 or less with respect to all elements except for lithium and oxygen.
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6.发明公开公开(公告)号：US20240097125A1
公开(公告)日：2024-03-21
申请号：US18349955
申请日：2023-07-11
发明人： Yong Seok LEE , Jeong Hoon JEUN , Jae Ram KIM , Jae Yun MIN , Ki Joo EOM , Myung Ro LEE , Hyun Joong JANG , Je Nam CHOI
CPC分类号： H01M4/525 , H01M4/131 , H01M4/505 , H01M2004/021
摘要： A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include a lithium metal oxide particle containing nickel and having a mole fraction of cobalt of 0.02 or less among all elements except lithium and oxygen.
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7.发明公开公开(公告)号：US20240006606A1
公开(公告)日：2024-01-04
申请号：US18338277
申请日：2023-06-20
申请人： SK ON CO., LTD.
发明人： Yong Seok LEE , Jae Ram KIM , Ji Won NA , Sang Won BAE , Yeon Hwa SONG , Ki Joo EOM , Myung Ro LEE , Jae Yeong LEE , Hyun Joong JANG
IPC分类号： H01M4/525 , H01M4/505 , H01M4/133 , H01M10/0525
CPC分类号： H01M4/525 , H01M4/505 , H01M4/133 , H01M10/0525 , H01M2004/028
摘要： A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes a cathode active material and a conductive material ID/IG is in a range from 0.5 to 1.25 in a Raman spectrum of the cathode active material layer. The cathode active material includes lithium metal oxide particles containing nickel and manganese and having a content of cobalt of less than 2 mol % among all elements except for lithium and oxygen.
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