公开(公告)号：US20190051924A1

公开(公告)日：2019-02-14

申请号：US15754335

申请日：2017-04-25

Applicant: LG CHEM, LTD.

Inventor： Sung Jong KIM ,  Tae Kyu KIM ,  Kyung Taek KIM ,  Dong Hyun KIM ,  Kyung Jae LEE ,  Cha Hun KU ,  Eui Kyung LEE

IPC: H01M10/04 ,  H01M2/16 ,  H01M2/14

CPC classification number: H01M10/04 ,  H01M2/145 ,  H01M2/1673 ,  H01M10/0413 ,  H01M10/0436

Abstract: The present invention relates to a method for manufacturing a secondary battery. The method comprises: a first process (S10) of manufacturing an incomplete electrode assembly; a second process (S20) of partially pressing the incomplete electrode assembly to manufacture a complete electrode assembly in which a bonding portion and a nonbonding portion coexist; a third process (S30) of accommodating the complete electrode assembly into a case; a fourth process (S40) of injecting an electrolyte through an opening of the case to impregnate the electrolyte into the electrode assembly; a fifth process (S50) of sealing an unsealed surface in which the opening of the case is formed to manufacture a secondary battery; and a sixth process (S60) of heating and pressing an entire surface of the secondary battery to bond the nonbonding portion of the interface between the electrode and the separator.

公开(公告)号：US20190044177A1

公开(公告)日：2019-02-07

申请号：US15759618

申请日：2017-07-07

Applicant: LG CHEM, LTD.

Inventor： Sang Kyun LEE ,  Jung Kwan PYO ,  Cha Hun KU

IPC: H01M10/04 ,  H01M2/16 ,  H01M2/18

Abstract: The present invention relates to an electrode assembly and a method for manufacturing the same, and more particularly, to an electrode assembly in which a degree of alignment of cells is improved and a method for manufacturing the same. An electrode assembly according to the present invention comprises a separator sheet folded in a zigzag shape and a unit cell having a structure in which an electrode and a separator are alternately stacked, wherein the unit cell is repeatedly disposed between the separator sheet that is folded in a zigzag shape, and at least a portion of the unit cell and at least a portion of the separator sheet are bonded to each other.

公开(公告)号：US20210086388A1

公开(公告)日：2021-03-25

申请号：US16629866

申请日：2019-04-01

Applicant: LG CHEM, LTD.

Inventor： Byeong Kyu LEE ,  Cha Hun KU ,  Jung Kwan PYO ,  Jin Gon KIM ,  Tai Jin JUNG ,  Won Nyeon KIM

IPC: B26D7/14 ,  H01M2/02 ,  H01M4/04 ,  B26F1/12

Abstract: Discussed is a notching apparatus for a secondary battery that includes: a lower mechanism comprising a die and a die holder to which the die is fixed, the die engaging an electrode provided with a coating portion and a non-coating portion; a stripper including a first stripper pressing the coating portion and a pair of second strippers pressing and fixing the non-coating portion; an upper mechanism including a punch provided between the pair of second strippers and provided with a cutting blade cutting the non-coating portion disposed between the pair of second strippers and a punch holder allowing the punch to move in a direction of the lower mechanism; and a pressing member pressing the non-coating portion disposed between the pair of second strippers to increase in tension force when the non-coating portion is cut by the punch.

公开(公告)号：US20210036302A1

公开(公告)日：2021-02-04

申请号：US16614201

申请日：2018-10-17

Applicant: LG Chem, Ltd.

Inventor： Seok Jin KIM ,  Sang Hyun KOO ,  Cha Hun KU

IPC: H01M2/36 ,  H01M10/04

Abstract: The present invention relates to an electrolyte removing device. The electrolyte removing device comprises: a jig assembly configured to receive in a seated position a pouch comprising an accommodation part in which an electrode assembly is accommodated, a gas pocket part, and a connection part connecting the accommodation part to the gas pocket part; and an electrolyte removing assembly configured to push an electrolyte remaining on the connection part to the gas pocket part to remove the electrolyte from the connection part.

公开(公告)号：US20200161647A1

公开(公告)日：2020-05-21

申请号：US16604930

申请日：2018-09-06

Applicant: LG CHEM, LTD.

Inventor： Sangkyun LEE ,  Baeck Boem CHOI ,  Cha Hun KU ,  Minwook KIM

IPC: H01M4/38 ,  H01M10/058 ,  H01M4/66 ,  H01M10/052 ,  H01M4/1395

Abstract: A method for producing a lithium metal negative electrode structure including the steps of: (a) forming a lithium metal layer on a portion of one side or both sides of a current collector, wherein a non-coated portion of the current collector, on which a tab will be formed, is included on one side of the current collector, and wherein a stepped part is present between the non-coated portion of the current collector and the coated portion of the lithium metal layer; (b) coating and curing a photocurable material, or attaching an insulating tape, onto the stepped part between the non-coated portion of the current collector and the coated portion of the lithium metal layer; and (c) punching the result of step (b) into a unit electrode to produce the lithium metal negative electrode structure.

公开(公告)号：US20200036054A1

公开(公告)日：2020-01-30

申请号：US16337313

申请日：2018-03-27

Applicant: LG CHEM, LTD.

Inventor： Seok Jin KIM ,  Sang Hyun KOO ,  Cha Hun KU

IPC: H01M10/42 ,  B23K37/04 ,  G01M3/24

Abstract: A jig device for inspecting quality of a secondary battery, which fixes the secondary battery and inspects quality of the secondary battery, is provided in which the jig device includes a jig base having a seating hole, a fixed module mounted on the jig base at one side of the seating hole, a first gliding module mounted on the jig base at a side opposite to the fixed module and glidable toward the fixed module, and a support part extending across the seating hole. A masking block is mounted on one or more portions of the fixed module and the first gliding module, which comes into contact with an edge of the secondary battery to fix the secondary battery. The first gliding module is detachable from the jig base, and the support part is separable from the fixed module and the first gliding module.

公开(公告)号：US20140106237A1

公开(公告)日：2014-04-17

申请号：US14136217

申请日：2013-12-20

Applicant: LG Chem, Ltd.

Inventor： Kwan Soo LEE ,  Cha Hun KU ,  Duk Hyun RYU ,  Jung Jin KIM ,  Byung Kyu JUNG

IPC: H01M4/62 ,  H01M10/052 ,  H01M10/0567

CPC classification number: H01M4/622 ,  H01M4/13 ,  H01M4/621 ,  H01M4/624 ,  H01M10/052 ,  H01M10/0567 ,  H01M2004/027

Abstract: The present invention relates to a lithium secondary battery. The present invention provides the lithium secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode includes a water-dispersible binder and a conduction agent. The non-aqueous electrolyte solution includes fluoroethylenecarbonate (FEC). The batteries of the present invention are advantageous in that they have a high efficiency charging lifespan characteristic and enable high capacity charging in a short time.

Abstract translation: 锂二次电池技术领域本发明涉及锂二次电池。 本发明提供了包括正极，负极和非水电解质溶液的锂二次电池。 负极包括水分散性粘合剂和导电剂。 非水电解质溶液包括氟代乙烯碳酸酯（FEC）。 本发明的电池的优点在于它们具有高效率的充电寿命特性，并且能够在短时间内实现高容量充电。