公开(公告)号：US11387499B2

公开(公告)日：2022-07-12

申请号：US16341627

申请日：2018-07-10

Applicant: LG CHEM, LTD.

Inventor： Chul Gi Hong ,  Jae Hyun Lee ,  Dong Kyu Kim ,  Dae Soo Kim

IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/44 ,  H01M10/52

Abstract: A method for regenerating a cell having an electrode assembly, in which electrodes and a separator are alternately combined with each other, an electrolyte, and a battery case accommodating the electrode assembly and the electrolyte according to the present invention includes performing a negative pressure processing process in which a negative pressure is applied to the cell to allow a gas disposed between the electrodes to move outside the electrode assembly and performing an ultrasonic wave processing process in which the cell is stimulated by ultrasonic waves to allow the electrolyte disposed outside the electrode assembly to move between the electrodes.

公开(公告)号：US11355787B2

公开(公告)日：2022-06-07

申请号：US16618464

申请日：2018-12-20

Applicant: LG CHEM, LTD.

Inventor： Chul Gi Hong ,  Dae Soo Kim ,  Dong Kyu Kim ,  Jae Hyun Lee

IPC: H01M10/42 ,  H01M10/0585 ,  H01M10/39 ,  H01M10/0525

Abstract: A method for regenerating an end of life (EOL) cell which comprises an electrode assembly including a cathode, an anode, and a separator interposed between the cathode and the anode, wherein the EOL cell is left under a high temperature environment of 80° C. or higher for a predetermined time while pressure is applied thereto, whereby gas located within the electrode assembly is moved to the outer portion of the electrode assembly is provided. The method can regenerate an EOL cell in a simple and economical way without breaking or damaging the same, and furthermore can also be applied to a pack or module which is an extended unit of the cell. A pressuring jig is also provided.

公开(公告)号：US11362373B2

公开(公告)日：2022-06-14

申请号：US16497235

申请日：2018-07-10

Applicant: LG Chem, Ltd.

Inventor： Chul Gi Hong ,  Jae Hyun Lee ,  Seok Koo Kim ,  Dong Kyu Kim ,  Dae Soo Kim

IPC: H01M10/42 ,  G01R31/389 ,  G01R31/392 ,  H01M4/38 ,  H01M10/052

Abstract: A method for regenerating a lithium secondary battery including a lithium resupply step in which a lithium resupply electrode is provided in the secondary battery, and the positive electrode is set as a counter electrode, and the lithium resupply electrode is set as a working electrode to charge lithium ions to the positive electrode through the lithium resupply electrode and a negative electrode discharging step in which, after the lithium ions are resupplied to the positive electrode through the lithium resupply step, the lithium resupply electrode is set as the counter electrode, and the negative electrode is set as the working electrode to completely discharge the negative electrode up to a discharge limit.

公开(公告)号：US11258146B2

公开(公告)日：2022-02-22

申请号：US16627022

申请日：2018-01-11

Applicant: LG Chem, Ltd.

Inventor： Chul Gi Hong ,  Dong Kyu Kim

IPC: H01M50/578 ,  H01M50/172

Abstract: The present invention relates to a battery cell having an overcharge prevention member, and more particularly, to a battery cell including a protective member for preventing explosion due to the pressure caused by various factors inside the battery.

公开(公告)号：US11171322B2

公开(公告)日：2021-11-09

申请号：US15747367

申请日：2016-12-08

Applicant: LG Chem, Ltd.

Inventor： Jong Heon Seol ,  Min Hee Lee ,  Dong Kyu Kim ,  Jae Woong Kim ,  Ye Lin Kim ,  Sang Hoon Choy ,  Je Young Kim ,  Sun Kyu Kim

IPC: H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g/cc or more, and has an average pore diameter of 0.1 μm to 0.5 μm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.

公开(公告)号：US11374285B2

公开(公告)日：2022-06-28

申请号：US16346014

申请日：2018-06-26

Applicant: LG CHEM, LTD.

Inventor： Chul Gi Hong ,  Dong Kyu Kim ,  Dae Soo Kim

IPC: H01M50/333 ,  B01D39/16 ,  B01D46/12 ,  H01M50/60

Abstract: A secondary battery according to the present invention including a battery case with an accommodation part accommodating an electrode assembly and an electrolyte, a fluid inlet/outlet port provided in the battery case to provide a moving passage through which a fluid is movable so that discharge of an inner gas and reinjection of the electrolyte are enabled, a gas discharge part restricting the discharge of the inner gas passing through the fluid inlet/outlet port, and an electrolyte reinjection part provided to reinject the electrolyte through the fluid inlet/outlet port.

公开(公告)号：US11081765B2

公开(公告)日：2021-08-03

申请号：US16470026

申请日：2018-01-23

Applicant: LG CHEM, LTD.

Inventor： Chul Gi Hong ,  Jae Hyun Lee ,  Dong Kyu Kim ,  Dae Soo Kim

IPC: H01M50/609 ,  H01M50/618 ,  H01M50/627 ,  H01M50/673 ,  H01M50/682 ,  H01M50/60 ,  H01M50/691 ,  H01M10/42

Abstract: The present invention relates to a battery cell refillable with an electrolyte, an electrolyte refilling system for a battery pack configured to include a plurality of battery cells, and an electrolyte refilling method for a battery pack of an electric vehicle.

公开(公告)号：US20180219212A1

公开(公告)日：2018-08-02

申请号：US15747367

申请日：2016-12-08

Applicant: LG Chem, Ltd.

Inventor： Jong Heon Seol ,  Min Hee Lee ,  Dong Kyu Kim ,  Jae Woong Kim ,  Ye Lin Kim ,  Sang Hoon Choy ,  Je Young Kim ,  Sun Kyu Kim

IPC: H01M4/133 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

CPC classification number: H01M4/133 ,  H01M4/131 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided herein are a positive electrode for a secondary battery and a secondary battery including the same. The positive electrode includes a positive electrode active material layer including a positive electrode active material, a conductive material, and a dispersant, wherein the conductive material includes bundle-type carbon nanotubes, units of which have an average strand diameter of 15 nm or less, and the positive electrode active material layer has a packing density of 3.0 g/cc or more, and has an average pore diameter of 0.1 μm to 0.5 μm at the packing density when a pore size distribution is measured by mercury intrusion porosimetry, and thus may exhibit excellent electrolyte wetting properties. As a result, when the positive electrode is applied to a battery, wetting time of the positive electrode is shortened, and an area of the positive electrode that is not filled with an electrolyte is reduced, resulting in enhanced battery performance.

公开(公告)号：US11201379B2

公开(公告)日：2021-12-14

申请号：US15979978

申请日：2018-05-15

Applicant: LG CHEM, LTD.

Inventor： Jong Keon Yoon ,  Dae Soo Kim ,  Dong Kyu Kim

IPC: H01M2/02 ,  H01M2/36 ,  H01M50/636 ,  F16K15/18 ,  F16K31/50 ,  H01M50/10 ,  H01M50/60 ,  H01M50/691 ,  F16K15/00

Abstract: The secondary battery includes a body part provided in a pillar shape on an outer wall and including a passage, through which the electrolyte flows, therein, a pin switch extending in a longitudinal direction of the body part, wherein, when a pressure is applied to an end of the pin switch, the pin switch linearly moves toward the inside, and when the pressure is removed, the pin switch linearly moves toward the outside, a manipulation part to move in a direction that is parallel to the pin switch, a pressure apply part protruding from a central portion of the manipulation part to apply a pressure an end of the pin switch, and a switching part disposed on the other end of the pin switch to open and close the passage.

公开(公告)号：US20200295410A1

公开(公告)日：2020-09-17

申请号：US16497235

申请日：2018-07-10

Applicant: LG Chem, Ltd.

Inventor： Chul Gi Hong ,  Jae Hyun Lee ,  Seok Koo Kim ,  Dong Kyu Kim ,  Dae Soo Kim

IPC: H01M10/42 ,  H01M10/052 ,  H01M4/38 ,  G01R31/392 ,  G01R31/389

Abstract: A method for regenerating a lithium secondary battery including a lithium resupply step in which a lithium resupply electrode is provided in the secondary battery, and the positive electrode is set as a counter electrode, and the lithium resupply electrode is set as a working electrode to charge lithium ions to the positive electrode through the lithium resupply electrode and a negative electrode discharging step in which, after the lithium ions are resupplied to the positive electrode through the lithium resupply step, the lithium resupply electrode is set as the counter electrode, and the negative electrode is set as the working electrode to completely discharge the negative electrode up to a discharge limit.