公开(公告)号：US20200212438A1

公开(公告)日：2020-07-02

申请号：US16634712

申请日：2018-08-27

Applicant: LG CHEM, LTD.

Inventor： Joo Sung LEE ,  Hee Won LEE

IPC: H01M4/38 ,  H01M4/134 ,  H01M4/36 ,  H01M4/62 ,  H01M4/66 ,  H01M4/60 ,  H01M10/0525

Abstract: A negative electrode for a lithium secondary battery including: a negative electrode current collector; and a negative electrode active material layer disposed on the negative electrode current collector, wherein the negative electrode active material layer includes: a graphite-based active material having an average particle diameter (D50) of 5 μm to 50 μm; silicon nanoparticles having an average particle diameter (D50) of 70 nm to 300 nm; a first conductive material; and two or more cellulose-based compounds, wherein each cellulose-based compound has a different weight average molecular weight, a method of forming the negative electrode, and a lithium secondary battery including the negative electrode.

公开(公告)号：US20150380702A1

公开(公告)日：2015-12-31

申请号：US14850590

申请日：2015-09-10

Applicant: LG CHEM, LTD.

Inventor： Joo Sung LEE ,  Jang-Hyuk HONG ,  Jong-Hun KIM

IPC: H01M2/14 ,  H01M10/0525 ,  H01M2/16

CPC classification number: H01M2/145 ,  B05D1/26 ,  B05D3/0254 ,  B05D3/104 ,  B05D2252/02 ,  H01M2/1646 ,  H01M2/1653 ,  H01M2/166 ,  H01M2/1686 ,  H01M10/0525

Abstract: A method for manufacturing a separator includes (S1) preparing a porous substrate having pores, (S2) coating at least one surface of the porous substrate with a first solvent, (S3) coating the first solvent with a slurry containing inorganic particles dispersed therein and formed by dissolving a binder polymer in a second solvent, (S4) drying the first and second solvents simultaneously to form a porous organic-inorganic composite layer on the porous substrate. Since the phenomenon that the pores of the porous substrate are closing by the binder polymer is minimized, it is possible to prevent the resistance of the separator from increasing due to the formation of the porous organic-inorganic composite layer.

Abstract translation: 制造隔膜的方法包括：（S1）制备具有孔的多孔基材，（S2）用第一溶剂涂布多孔基材的至少一个表面，（S3）用分散有无机颗粒的浆料涂布第一溶剂， 通过将粘合剂聚合物溶解在第二溶剂中形成，（S4）同时干燥第一和第二溶剂以在多孔基材上形成多孔有机 - 无机复合层。 由于多孔基材的孔被粘合剂聚合物闭合的现象最小化，可以防止由于多孔有机 - 无机复合层的形成而增加隔膜的电阻。

公开(公告)号：US20190237975A1

公开(公告)日：2019-08-01

申请号：US16339549

申请日：2018-03-09

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk SONG ,  Joo Sung LEE

IPC: H02J7/00 ,  H01M10/0525 ,  H01M4/587 ,  H01M10/44

CPC classification number: H02J7/007 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/44 ,  H01M2004/027 ,  H02J7/00

Abstract: A method of charging a secondary battery, including first, second and third charging sections in which a CC-charging performed as first, second, and third C-rate (C1, C2, C3), respectively, is supplied until the voltage of the secondary battery reaches a respective first, second and third charging cutoff voltage (V1), (V2), (V3) and a CV-charging is performed as the respective charging C-rate gradually decreases in response to reaching the respective charging cutoff voltage (V1), (V2), (V3), wherein the charging cutoff voltage satisfies the V1=n−(0.25˜0.15), V2=n−(0.2˜0.1), and V3=n (here, ‘n’ is an electric potential at the full charge of the secondary battery), and V1

公开(公告)号：US20180026242A1

公开(公告)日：2018-01-25

申请号：US15551100

申请日：2016-04-22

Applicant: LG Chem, Ltd.

Inventor： Joo Sung LEE ,  Sun Mi JIN

IPC: H01M2/10 ,  H01M4/66

CPC classification number: H01M2/1072 ,  B60L3/0007 ,  B60L3/0046 ,  B60L50/64 ,  B60Y2306/01 ,  H01M4/661 ,  H01M4/667 ,  H01M10/052 ,  H01M10/4235 ,  H01M2220/20 ,  Y02E60/122 ,  Y02T10/7005 ,  Y02T10/705

Abstract: The present invention relates to a secondary battery pack and a vehicle comprising the same. Specifically, the present invention provides a secondary battery pack comprising at least one battery cell and at least one structure covering at least a part of the battery cell and electrically insulated from the battery cell, wherein at least a part of the structure comprising a material having resistivity of 3 times or less based on resistivity of at least one material comprised in a positive electrode collector of the battery cell.

公开(公告)号：US20210218029A1

公开(公告)日：2021-07-15

申请号：US17054423

申请日：2019-05-09

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk SONG ,  Je Young KIM ,  Joo Sung LEE ,  Suk In NOH ,  Hee Won LEE

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/485 ,  H01M4/66

Abstract: A negative electrode and a secondary battery including the same are described, the negative electrode including a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a negative electrode active material including SiOx (0≤x

公开(公告)号：US20200381702A1

公开(公告)日：2020-12-03

申请号：US16958953

申请日：2019-02-18

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk SONG ,  Je Young KIM ,  Joo Sung LEE ,  Suk In NOH ,  Hee Won LEE

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/04 ,  H01M10/44

Abstract: The present invention relates to a secondary battery capacity recovery method and apparatus for recovering the capacity of a secondary battery with deteriorated lifespan characteristics. The secondary battery capacity recovery method of the present invention comprises: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.