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.

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.

公开(公告)号：US20240079568A1

公开(公告)日：2024-03-07

申请号：US18493804

申请日：2023-10-25

申请人： SK ON CO., LTD.

发明人： Yong Seok LEE ,  Jung Hwan KIM ,  Myung Ro LEE ,  Sang Won BAE ,  Ji Hee BAE

IPC分类号： H01M4/36 ,  H01M4/133 ,  H01M4/48 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525

CPC分类号： H01M4/366 ,  H01M4/133 ,  H01M4/364 ,  H01M4/483 ,  H01M4/587 ,  H01M4/622 ,  H01M10/0525 ,  H01M2004/027

摘要： A lithium secondary battery includes a cathode, a separator, and an anode including an anode current collector and an anode active material layer formed on the anode current collector and facing the cathode with the separator interposed therebetween. The anode active material layer includes a first anode active material layer formed on the anode current collector and including a first anode active material and a first anode binder containing a styrene-butadiene-based rubber (SBR) binder and a second anode active material layer formed on the first anode active material layer and including a second anode active material and a second anode binder containing a acryl-based binder. Each of the first anode active material and the second anode active material includes a silicon-based active material and a graphite-based material and contains 2 to 9.5 parts by weight of silicon with respect to the 100 part by weight of the graphite-based active material.