公开(公告)号：US11567048B2

公开(公告)日：2023-01-31

申请号：US16608222

申请日：2018-11-14

Applicant: LG CHEM, LTD.

Inventor： Ju Kyung Shin ,  Joon Sung Bae ,  Gyu Ok Hwang ,  In Young Cha

IPC: G01N33/00 ,  H01M10/42

Abstract: A jig for pressing a gas analysis monocell according to the present invention comprises: a first plate and a second plate which face each other with a monocell therebetween; a first auxiliary pad positioned between the first plate and the monocell; and a second auxiliary pad positioned between the second plate and the monocell, wherein the first plate and the second plate are formed of a thermosetting resin. When analyzing a gas generated from the monocell during a primary charge, the jig for pressing the monocell according to the present invention presses the thin monocell to prevent a gap from forming between electrodes due to the primary charge, and thus has an effect of deriving more reliable analysis results.

公开(公告)号：US11876191B2

公开(公告)日：2024-01-16

申请号：US17055814

申请日：2019-11-15

Applicant: LG CHEM, LTD.

Inventor： In Young Cha ,  Joon Sung Bae ,  Sung Hoon Yu ,  Seung Youn Choi ,  Gyu Ok Hwang

IPC: H01M10/44 ,  H01M10/04

CPC classification number: H01M10/443 ,  H01M10/04

Abstract: The present invention relates to a method for activating a secondary battery. The present invention comprises: a primary charging step of charging a secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte; a room temperature-aging step of storing, at a room temperature, the secondary battery that has undergone the primary charging step; and a high temperature-aging step of storing, at a high temperature, the secondary battery that has undergone the room temperature-aging step, wherein charging/discharging is performed by alternately applying + current and − current to the secondary battery at the end of the primary charging step. The method for activating a secondary battery according to the present invention includes alternately applying + current and − current to the secondary battery at the end of the primary charging step to stabilize an SEI film, thereby shortening a following-up aging time.