公开(公告)号：US11417906B2

公开(公告)日：2022-08-16

申请号：US16322293

申请日：2018-02-06

Applicant: LG Chem, Ltd.

Inventor： Han Gab Song ,  An Soo Jeong ,  Min Gyu Kim ,  Pil Kyu Park ,  So Ra Lee

IPC: H01M10/04 ,  H01M10/0525 ,  H01M50/107 ,  H01M50/342 ,  H01M50/375 ,  H01M50/119

Abstract: A cylindrical lithium secondary battery according to the present invention can reduce gas explosion by preventing gas concentration from being concentrated only on the upper top cap vent by increasing the gas spouting passage through which the inner gas of the can is spouted by forming a rupture portion of a material different from that of the can member on a part of the cylindrical can member, and when the inside or outside of the battery is exposed to a high temperature, by making, a shape-based alloy member, which causes cracking of the can member by deformation, included a part of the can member, the gas is discharged through the can vent by the cracking of the can member to prevent explosion before the tap cap safety vent operates by the internal air pressure, and ignition that may be caused by heating by internal or external heat may be prevented.

公开(公告)号：US11043669B2

公开(公告)日：2021-06-22

申请号：US16344659

申请日：2018-06-01

Applicant: LG Chem, Ltd.

Inventor： Nam Won Kim ,  Pil Kyu Park ,  Han Gab Song ,  An Soo Jeong

IPC: H01M4/36 ,  H01M10/0587 ,  H01M10/04 ,  H01M50/531 ,  H01M50/538 ,  H01M4/02

Abstract: The present invention relates to a secondary battery. The secondary battery comprises an electrode assembly in which an electrode and a separator are alternately stacked and wound, wherein the electrode comprises a collector, a first coating layer in which an electrode active material is applied to a surface of the collector, and a second coating layer in which the electrode active material is applied to the outside of the first coating layer, wherein an end of the second coating layer has a length less than an end of first coating layer in a winding direction of the electrode, and a stepped portion occurs between the end of the first coating layer and the end of the second coating layer in a direction outward from a winding center.

公开(公告)号：US20180123163A1

公开(公告)日：2018-05-03

申请号：US15575653

申请日：2016-07-21

Applicant: LG Chem, Ltd.

Inventor： Pil Kyu Park ,  Joo Hwan Sung ,  Jung Koo Kang ,  Je Jun Lee ,  Han Gab Song ,  Yeo Min Yoon

IPC: H01M10/052 ,  H01M2/04 ,  H01M2/12

Abstract: The present invention relates to a cap assembly formed of a composite of cap assembly ceramic for the cylindrical battery and mounted on a top end portion of the cylindrical secondary battery in which an electrode assembly is placed in a cylindrical can, which includes a safety vent having a predetermined notch configured to be ruptured by high pressure gas generated in the battery, a current interrupt device coupled to a lower end of the safety vent and blocking a current when an internal pressure of the battery rises, and a gasket for the current interrupt device surrounding an outer circumferential surface of the current interrupt device, wherein the gasket for the current interrupt device comprises a polymer resin having a melting point of 250° C. or more and a heat deflection temperature (HDT) of 200° C. or more, and a cylindrical secondary battery including the same.

公开(公告)号：US11495783B2

公开(公告)日：2022-11-08

申请号：US16467177

申请日：2018-06-27

Applicant: LG Chem, Ltd.

Inventor： Nam Won Kim ,  Pil Kyu Park ,  Han Gab Song ,  Duck Joong Yun ,  Dae Hyun Kim ,  An Soo Jeong

IPC: H01M4/04 ,  B21B37/16 ,  B21B38/08 ,  B21B1/24

Abstract: A system for manufacturing an electrode for a secondary battery is disclosed herein. In an embodiment, the system for manufacturing the electrode for the secondary battery comprises a supply roller for supplying a collector having a long sheet shape; an electrode active material coating device for applying an electrode active material to a surface of the collector supplied by the supply roller to manufacture an unfinished electrode; a rolling roller for rolling a surface of the unfinished electrode and adjusting a thickness of the electrode active material to manufacture a finished electrode; and an electrode quality inspection device for inspecting quality of the electrode through a surface roughness value of the rolling roller, a surface roughness value of the surface of the electrode, and a rolling load value of the rolling roller.

公开(公告)号：US10454081B2

公开(公告)日：2019-10-22

申请号：US15563236

申请日：2016-09-12

Applicant: LG Chem, Ltd.

Inventor： Han Gab Song

IPC: H01M2/10 ,  H01M10/613 ,  H01M10/48 ,  H01M10/659

Abstract: A battery pack according to the present invention comprises a battery cell and a battery case accommodating the battery cell, wherein the battery case comprises an inner case accommodating the battery cell, an outer case disposed outside the inner case, and a cooling member between the inner and outer cases to indirectly cool the battery cell by using cool air generated by cooling the inner and outer cases.

公开(公告)号：US20190165407A1

公开(公告)日：2019-05-30

申请号：US16322293

申请日：2018-02-06

Applicant: LG Chem, Ltd.

Inventor： Han Gab Song ,  An Soo Jeong ,  Min Gyu Kim ,  Pil Kyu Park ,  So Ra Lee

IPC: H01M10/04 ,  H01M10/0525 ,  H01M2/02 ,  H01M2/12

Abstract: A cylindrical lithium secondary battery according to the present invention can reduce gas explosion by preventing gas concentration from being concentrated only on the upper top cap vent by increasing the gas spouting passage through which the inner gas of the can is spouted by forming a rupture portion of a material different from that of the can member on a part of the cylindrical can member, and when the inside or outside of the battery is exposed to a high temperature, by making, a shape-based alloy member, which causes cracking of the can member by deformation, included a part of the can member, the gas is discharged through the can vent by the cracking of the can member to prevent explosion before the tap cap safety vent operates by the internal air pressure, and ignition that may be caused by heating by internal or external heat may be prevented.

公开(公告)号：US11539044B2

公开(公告)日：2022-12-27

申请号：US16605491

申请日：2018-08-20

Applicant: LG CHEM, LTD.

Inventor： Nam Won Kim ,  Pil Kyu Park ,  Han Gab Song ,  Duck Joong Yun ,  Dea Hyun Kim ,  An Soo Jeong

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0587 ,  H01M4/02

Abstract: The present disclosure relates to a secondary battery electrode, a manufacturing method for the same, and an electrode assembly, and more particularly, to a secondary battery electrode, a manufacturing method for the same, and an electrode assembly having improved stability.
In accordance with an exemplary embodiment, a secondary battery electrode includes a current collector that extends in one direction, a first active material layer provided on one surface of the current collector and including a first inclined portion and a first protruding portion, and a second active material layer provided on the other surface of the current collector and including a second inclined portion and a second protruding portion. In particular, a position of the second protruding portion is controlled on the second active material layer to be disposed at a position that is not directly opposite to the first inclined portion with respect to the current collector.

公开(公告)号：US20190319256A1

公开(公告)日：2019-10-17

申请号：US16467177

申请日：2018-06-27

Applicant: LG Chem, Ltd.

Inventor： Nam Won Kim ,  Pil Kyu Park ,  Han Gab Song ,  Duck Joong Yun ,  Dae Hyun Kim ,  An Soo Jeong

IPC: H01M4/04 ,  B21B1/24 ,  B21B37/16 ,  B21B38/08

Abstract: A system for manufacturing an electrode for a secondary battery is disclosed herein. In an embodiment, the system for manufacturing the electrode for the secondary battery comprises a supply roller for supplying a collector having a long sheet shape; an electrode active material coating device for applying an electrode active material to a surface of the collector supplied by the supply roller to manufacture an unfinished electrode; a rolling roller for rolling a surface of the unfinished electrode and adjusting a thickness of the electrode active material to manufacture a finished electrode; and an electrode quality inspection device for inspecting quality of the electrode through a surface roughness value of the rolling roller, a surface roughness value of the surface of the electrode, and a rolling load value of the rolling roller.

公开(公告)号：US11196112B2

公开(公告)日：2021-12-07

申请号：US16322017

申请日：2018-01-25

Applicant: LG Chem, Ltd.

Inventor： Han Gab Song ,  Kyung Min Kim ,  Min Gyu Kim ,  Pil Kyu Park

IPC: H01M50/116 ,  H01M10/04 ,  H01M10/0587 ,  H01M50/107 ,  H01M50/411 ,  H01M50/184 ,  H01M10/052

Abstract: The present disclosure provides an insulation member having excellent mechanical properties having enough shock-absorbing effect in external shock and volume change in a battery and provides a cylindrical secondary battery including the insulation member. The insulation member according to the present disclosure has excellent mechanical properties in high temperature, is composed of polypropylene having narrow molecular weight, and has a fine pattern on the surface.

公开(公告)号：US10818959B2

公开(公告)日：2020-10-27

申请号：US15575653

申请日：2016-07-21

Applicant: LG Chem, Ltd.

Inventor： Pil Kyu Park ,  Joo Hwan Sung ,  Jung Koo Kang ,  Je Jun Lee ,  Han Gab Song ,  Yeo Min Yoon

IPC: H01M2/08 ,  H01M2/34 ,  H01M2/04 ,  H01M2/12 ,  H01M10/052 ,  H01M10/0525

Abstract: The present invention relates to a cap assembly formed of a composite of cap assembly ceramic for the cylindrical battery and mounted on a top end portion of the cylindrical secondary battery in which an electrode assembly is placed in a cylindrical can, which includes a safety vent having a predetermined notch configured to be ruptured by high pressure gas generated in the battery, a current interrupt device coupled to a lower end of the safety vent and blocking a current when an internal pressure of the battery rises, and a gasket for the current interrupt device surrounding an outer circumferential surface of the current interrupt device, wherein the gasket for the current interrupt device comprises a polymer resin having a melting point of 250° C. or more and a heat deflection temperature (HDT) of 200° C. or more, and a cylindrical secondary battery including the same.