Patents by Inventor Je Jun Lee

Je Jun Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11056749
    Abstract: To solve the above-described objects, a method for manufacturing a secondary battery according to an embodiment of the present invention comprises: manufacturing an electrode assembly in which electrodes and a separator are alternately stacked; inserting the electrode assembly into a battery case through an opening; covering the opening of the battery case; injecting an electrolyte into the battery case through an injection hole formed in the battery case; closing the injection hole; performing a pre-formation process; and applying external force to a switch of a gas discharge device formed on one surface of the battery case, thereby linearly moving a gasket of the gas discharge device and opening a gas discharge hole, such that a first gas generated in the battery case is discharged to an outside of the battery case during the performing of the pre-formation process.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: July 6, 2021
    Inventors: Jin Uk Do, Je Jun Lee, Sang Suk Jung, Min Ki Jo
  • Publication number: 20210083333
    Abstract: The present invention relates to a washer for a secondary battery including a film layer and an adhesive layer disposed on at least one surface of the film layer, wherein the adhesive layer includes an adhesive component and an indicator component, and the indicator component is fat-soluble, a secondary battery including the same, and a method for manufacturing the washer.
    Type: Application
    Filed: December 21, 2018
    Publication date: March 18, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Byoung Gu LEE, Do Gyun KIM, Je Jun LEE, Sang Suk JUNG, Hang Soo SHIN
  • Patent number: 10938008
    Abstract: The present disclosure relates to a battery cell tray, which is a tray configured to accommodate a plurality of cylinder type battery cells in a storage of a first packaging member, including a first tray member having a plate type structure in which a plurality of first recessed portions surrounding one side end portions of the battery cells are formed; and a second tray member having a plate type structure in which a plurality of second recessed portions surrounding the other side end portions facing the one side end portions of the battery cells are formed, and the first and second tray members includes a volatile rust inhibitor which is vaporized at room temperature to form a rust-proofing film on surfaces of the battery cells.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: March 2, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Je Jun Lee, Do Gyun Kim, Kwang Su Hwangbo, Sang Sok Jung
  • Patent number: 10818959
    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.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: October 27, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Pil Kyu Park, Joo Hwan Sung, Jung Koo Kang, Je Jun Lee, Han Gab Song, Yeo Min Yoon
  • Publication number: 20200335736
    Abstract: A method of manufacturing a cylindrical battery case includes performing an ironing process, which is one of the processes of manufacturing the battery case, a plurality of times in order to decrease the surface roughness of the battery case, thereby improving the corrosion characteristics of the battery case. The surface roughness of the cylindrical battery case is decreased by performing a thickness reducing process when a process for forming the outer circumferential surface of a body of the cylindrical battery case is performed at the time of manufacturing the cylindrical battery case. In addition, corrosion characteristics are improved for respective values of the surface roughness.
    Type: Application
    Filed: October 23, 2018
    Publication date: October 22, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Kwang Su Hwang Bo, Je Jun Lee, Sang Sok Jung, Jun Tak Kim, Gil Young Lee, Seong Mo Koo
  • Patent number: 10790486
    Abstract: Provided are a secondary battery that is capable of preventing a can member from corroding and a method for manufacturing the same. The secondary battery includes a can member defining an outer appearance of the secondary battery, a top cap assembly an opening of the can member, a gasket insulating the can member and the top cap assembly from each other, and a fracture part disposed on an inner circumference of the opening. The fracture part is blocked from the outside by the gasket.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: September 29, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Do Gyun Kim, Je Jun Lee, Kwang Su Hwangbo, Sang Suk Jung, Hang Soo Shin, Gil Young Lee
  • Publication number: 20200152952
    Abstract: A cylindrical secondary battery includes a jelly-roll type electrode assembly, a cylindrical battery case for receiving the jelly-roll type electrode assembly, and a cap assembly mounted to the open upper end of the cylindrical battery case. The jelly-roll type electrode assembly includes a long sheet type positive electrode and a long sheet type negative electrode wound with a separator interposed between the positive electrode and the negative electrode. A welding pole is formed on the bottom surface of the cylindrical battery case so as to extend perpendicularly thereto.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 14, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Ha Young Heo, Je Jun Lee, Hyoung Kwon Kim, Hae Jin Lim, Sang Uck Kim
  • Patent number: 10615381
    Abstract: The present invention relates to a cap assembly for a secondary battery mounted on an opening of a can. The cap assembly comprises: a top cap; a safety element disposed on a lower portion of the top cap; a safety vent disposed on a lower portion of the safety element; and a gasket surrounding edges of the top cap, the safety element, and the safety vent and mounted on the opening of the can, wherein an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: April 7, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Byoung Kook Lee, Hang Soo Shin, Do Gyun Kim, Je Jun Lee, Jun Tak Kim, Byoung Gu Lee, Sang Suk Jung
  • Publication number: 20200035962
    Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.
    Type: Application
    Filed: December 26, 2017
    Publication date: January 30, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
  • Patent number: 10497992
    Abstract: The present disclosure relates to a case for a secondary battery and a secondary battery having the same. More specifically, it relates to a case for a secondary battery having a washer for detecting leakage with a structure improved so as to check leakage of an electrolyte and a secondary battery having the same. A lithium ion secondary battery according to the present disclosure provides an effect of easily checking the leakage of an electrolyte with naked eyes through the color change of a washer when a trace amount of the electrolyte leaks.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: December 3, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Je-Jun Lee, Hang-Soo Shin, Do-Gyun Kim, Byoung-Gu Lee, Sang-Sok Jung
  • Patent number: 10490792
    Abstract: The present disclosure relates to a cap assembly for a secondary battery and a secondary battery including the same. Specifically, a CID filter is fixed in the cap assembly such that, even when a gas is discharged due to the rupture of a safety vent, the CID short-circuit pressure is not affected.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: November 26, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Byoung-Kook Lee, Je-Jun Lee, Do-Gyun Kim, Sang-Sok Jung
  • Publication number: 20190291207
    Abstract: A pressurizing mask for supporting a combination of a top cap assembly and an electrode assembly has a welding portion and an indent portion into which an electrode tab is inserted.
    Type: Application
    Filed: August 13, 2018
    Publication date: September 26, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Minki JO, Je Jun LEE, Sang Sok JUNG, Jin Uk DO
  • Publication number: 20190280268
    Abstract: The present disclosure relates to a battery cell tray, which is a tray configured to accommodate a plurality of cylinder type battery cells in a storage of a first packaging member, including a first tray member having a plate type structure in which a plurality of first recessed portions surrounding one side end portions of the battery cells are formed; and a second tray member having a plate type structure in which a plurality of second recessed portions surrounding the other side end portions facing the one side end portions of the battery cells are formed, and the first and second tray members includes a volatile rust inhibitor which is vaporized at room temperature to form a rust-proofing film on surfaces of the battery cells.
    Type: Application
    Filed: January 12, 2018
    Publication date: September 12, 2019
    Applicant: LG CHEM, LTD.
    Inventors: Je Jun LEE, Do Gyun KIM, Kwang Su HWANGBO, Sang Sok JUNG
  • Publication number: 20190280252
    Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.
    Type: Application
    Filed: December 26, 2017
    Publication date: September 12, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
  • Publication number: 20190267593
    Abstract: To solve the above-described objects, a method for manufacturing a secondary battery according to an embodiment of the present invention comprises: manufacturing an electrode assembly in which electrodes and a separator are alternately stacked; inserting the electrode assembly into a battery case through an opening; covering the opening of the battery case; injecting an electrolyte into the battery case through an injection hole formed in the battery case; closing the injection hole; performing a pre-formation process; and applying external force to a switch of a gas discharge device formed on one surface of the battery case, thereby linearly moving a gasket of the gas discharge device and opening a gas discharge hole, such that a first gas generated in the battery case is discharged to an outside of the battery case during the performing of the pre-formation process.
    Type: Application
    Filed: July 12, 2018
    Publication date: August 29, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jin Uk Do, Je Jun Lee, Sang Suk Jung, Min Ki Jo
  • Publication number: 20190229322
    Abstract: Disclosed are a method for manufacturing a secondary battery and an auxiliary case configured for use during manufacturing of the secondary battery. A gas generated in the secondary battery may be discharged to prevent an electrode assembly and the secondary battery from increasing in thickness, and an electrolyte may be efficiently injected into the secondary battery. A method for manufacturing a secondary battery includes: an accommodation step of accommodating an electrode assembly into a battery case; a connection step of connecting an auxiliary case to the battery case, the auxiliary case having an inner space therein; an injection step of injecting an electrolyte into the battery case and the auxiliary case; an electrolyte supply step of moving some of the electrolyte from the auxiliary case into the battery case; and a gas supply step of moving a gas from the battery case into the auxiliary case.
    Type: Application
    Filed: May 23, 2018
    Publication date: July 25, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jin Uk Do, Je Jun Lee, Sang Suk Jung, Min Ki Jo
  • Patent number: 10290903
    Abstract: Disclosed is a jellyroll-type electrode assembly including a first electrode, a second electrode, and a separator interposed between the electrodes folded together, in which the first electrode has a non-coating part and a first electrode tab attached onto the non-coating part, the non-coating part representing a part of the first electrode not coated with an active material, and the at least double-folded-layer separator is disposed between the first electrode tab and the second electrode.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 14, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Je-Jun Lee, Pil-Kyu Park, Jeong-In Yu, Cha-Hun Ku
  • Patent number: 10153465
    Abstract: Provided is a top cap assembly for a cylindrical type secondary battery, including a CID short-circuiting member, which interrupts an electric current when a high voltage is generated in the cylindrical type secondary battery, a safety vent connected to an upper part of the CID short-circuiting member and including a plurality of notches, which are broken when a voltage equal to or greater than an allowable voltage of the CID short-circuiting member is generated, to discharge gas from the cylindrical type secondary battery, a top cap connected to the safety vent and disposed on the uppermost end of an upper opening part of the cylindrical type secondary battery, a gasket surrounding and sealing an outer circumferential surface of the CID short-circuiting member, and a heat resistant member preventing heat transfer between the gasket and the safety vent.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: December 11, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Je Jun Lee, Sang Sok Jung, Hang Soo Shin
  • Patent number: 10115935
    Abstract: Provided is a corrosion resistant tube for a secondary battery including a volatile corrosion inhibitor (VCI) and a base resin, and a secondary battery including the same. The corrosion resistant tube of the present invention prevents the occurrence of rust or the occurrence of corrosion in a battery cell, and therefore, is capable of enhancing stability of the battery.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: October 30, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Je Jun Lee, Hang Soo Shin, Sang Sok Jung
  • Publication number: 20180309096
    Abstract: Provided are a secondary battery that is capable of preventing a can member from corroding and a method for manufacturing the same. The secondary battery includes a can member defining an outer appearance of the secondary battery, a top cap assembly an opening of the can member, a gasket insulating the can member and the top cap assembly from each other, and a fracture part disposed on an inner circumference of the opening. The fracture part is blocked from the outside by the gasket.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 25, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Do Gyun KIM, Je Jun LEE, Kwang Su HWANGBO, Sang Suk JUNG, Hang Soo SHIN, Gil Young LEE