公开(公告)号：US20210036272A1

公开(公告)日：2021-02-04

申请号：US16630243

申请日：2018-10-19

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Sung Hwan Cho ,  Soo Hyun Lim ,  Sun Hwak Woo ,  Jinseo Park

IPC: H01M2/06 ,  H01M2/30 ,  H01M2/26

Abstract: A rechargeable battery includes an electrode assembly; a case having a sealing portion surrounding the electrode assembly; and a lead electrically connected to the electrode assembly and extending in a first direction, wherein the lead includes a first region in contact with the electrode assembly and located inside the case; a second region exposed to an outside of the case; and a third region located between the first region and the second region and overlapping the sealing portion of the case, wherein the third region has a width greater than that of the first region and the second region in a second direction and has a thickness smaller than that of the first region and the second region in a third direction, and wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.

公开(公告)号：US20210391565A1

公开(公告)日：2021-12-16

申请号：US17283784

申请日：2020-01-20

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Minkyung Kim ,  Yeo Kyung Yoon ,  Sun Hwak Woo

IPC: H01M4/04

Abstract: SUMMARY
A method of preparing an electrode for a secondary battery according to an embodiment of the present disclosure includes the steps of: injecting a first slurry prepared by dissolving a first active material in a first solvent and a second slurry prepared by dissolving a second active material in a second solvent into a single coating device; and coating the first slurry and the second slurry onto a current collector through the single coating device, wherein the first solvent and the second solvent have different physical properties, and form a layered structure of a first layer including the first slurry and a second layer including the second slurry on the current collector, respectively.

公开(公告)号：US20180269458A1

公开(公告)日：2018-09-20

申请号：US15762342

申请日：2016-10-18

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Hyun Min Kim ,  Eun Ju Lee ,  Sun Hwak Woo

IPC: H01M2/26 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/0583 ,  H01M4/13 ,  H01M2/02 ,  H01M2/08

Abstract: The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.

公开(公告)号：US20210336272A1

公开(公告)日：2021-10-28

申请号：US17366026

申请日：2021-07-02

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Yeo Kyung Yoon ,  Sun Hwak Woo ,  Yu Ra Jeong

IPC: H01M4/66 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0525

Abstract: The present invention provides a one-sided electrode for a secondary battery comprising a current collector, an electrode mixture layer applied to one surface of the current collector, and an electrode distortion-preventing layer formed on the other surface of the current collector to which no electrode mixture is applied. The one-sided electrode according to the present invention exhibits significantly reduced warping or curling after a rolling process and has the advantages of facilitating subsequent processes and enabling enhanced productivity.

公开(公告)号：US10811665B2

公开(公告)日：2020-10-20

申请号：US15762342

申请日：2016-10-18

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Hyun Min Kim ,  Eun Ju Lee ,  Sun Hwak Woo

IPC: H01M2/26 ,  H01M10/04 ,  H01M2/10 ,  H01M2/02 ,  H01M2/08 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0583 ,  H01M10/0585

Abstract: The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.

公开(公告)号：US11532805B2

公开(公告)日：2022-12-20

申请号：US17283784

申请日：2020-01-20

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Minkyung Kim ,  Yeo Kyung Yoon ,  Sun Hwak Woo

IPC: H01M4/04 ,  B05D1/26 ,  H01M4/525 ,  H01M10/052 ,  H01M10/04 ,  H01M4/139

Abstract: SUMMARY
A method of preparing an electrode for a secondary battery according to an embodiment of the present disclosure includes the steps of: injecting a first slurry prepared by dissolving a first active material in a first solvent and a second slurry prepared by dissolving a second active material in a second solvent into a single coating device; and coating the first slurry and the second slurry onto a current collector through the single coating device, wherein the first solvent and the second solvent have different physical properties, and form a layered structure of a first layer including the first slurry and a second layer including the second slurry on the current collector, respectively.

公开(公告)号：US11205771B2

公开(公告)日：2021-12-21

申请号：US16606964

申请日：2018-11-30

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Soo Hyun Lim ,  Sun Hwak Woo ,  Jinseo Park

IPC: H01M4/21 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M4/02 ,  H01M10/00

Abstract: The present invention provides a method for preparing an electrode for a secondary battery, including the steps of: (i) mixing and kneading an active material, a binder, and a conductive material together with a solvent to prepare a slurry in the form of a paste having a solid content of 70 to 90 wt %; (ii) positioning the slurry in the form of a paste on a current collector; and (iii) passing the current collector through a rolling apparatus together with the slurry in the form of a paste to simultaneously press it while forming an electrode coating layer on the current collector.

公开(公告)号：US10978683B2

公开(公告)日：2021-04-13

申请号：US15743797

申请日：2016-08-18

Applicant: LG Chem, Ltd.

Inventor： Ji Won Min ,  Sun Hwak Woo ,  Seok Koo Kim ,  Sei Woon Oh ,  Eun Ju Lee

IPC: H01M2/10 ,  H01M10/058 ,  H01M10/44 ,  H01M2/16 ,  H01M4/134 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/38 ,  H01M4/02

Abstract: The present invention provides a method of manufacturing n battery cells (n≥2), each including a respective reference electrode for measuring a relative electrode potential, including: (i) manufacturing a reference cell composed of an electrolyte solution, the reference electrodes, and a lithium electrode; (ii) charging the reference cell; (iii) charging the reference cell to 40% to 60% of a capacity discharged in the process (ii), thereby performing formation on the reference electrodes; (iv) manufacturing the n battery cells, each of the battery cells including a respective one of the reference electrodes, an electrode assembly, the electrolyte solution and a battery case; and (v) in each of the battery cells, measuring a relative potential of the respective one of the reference electrodes and a positive electrode of the respective electrode assembly, and a relative potential of the respective one of the reference electrodes and a negative electrode of the respective electrode assembly.

公开(公告)号：US20200335766A1

公开(公告)日：2020-10-22

申请号：US16606964

申请日：2018-11-30

Applicant: LG Chem, Ltd.

Inventor： Sei Woon Oh ,  Soo Hyun Lim ,  Sun Hwak Woo ,  Jinseo Park

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/139

Abstract: The present invention provides a method for preparing an electrode for a secondary battery, including the steps of: (i) mixing and kneading an active material, a binder, and a conductive material together with a solvent to prepare a slurry in the form of a paste having a solid content of 70 to 90 wt %; (ii) positioning the slurry in the form of a paste on a current collector; and (iii) passing the current collector through a rolling apparatus together with the slurry in the form of a paste to simultaneously press it while forming an electrode coating layer on the current collector.

公开(公告)号：US20200274136A1

公开(公告)日：2020-08-27

申请号：US16649439

申请日：2019-07-01

Applicant: LG Chem, Ltd.

Inventor： Min Kyung Kim ,  Sei Woon Oh ,  Sun Hwak Woo ,  Jin Seo Park

IPC: H01M4/04 ,  H01M4/70 ,  H01M10/0585

Abstract: A punching system for an electrode base material is disclosed, in which the electrode base material coated with an active material on a surface of a collector is molded or cut in a predetermined shape. The punching system comprises: an unwinder on which the electrode base material in the form of a roll is mounted and around which the electrode base material is unwound; a punching device spaced a predetermined distance from the unwinder, the punching device being configured to mold or cut the electrode base material supplied from the unwinder in a predetermined shape; and a curl correcting device disposed between the unwinder and the punching device to inject or suction air onto a surface of the electrode base material while the electrode base material moves to the punching device so as to planarize the electrode base material. A punching method for an electrode base material is also disclosed.