Patents Assigned to LG Chem, Ltd.
  • Patent number: 11065963
    Abstract: A diagnostic system for a DC-DC voltage converter includes a microcontroller having a first diagnostic handler application and first and second applications. The first application sets a first non-recoverable diagnostic flag associated with the DC-DC voltage converter to a first encoded value having each nibble thereof selected from an odd Karnaugh set of binary values. The second application sets a second non-recoverable diagnostic flag to a second encoded value having each nibble thereof selected from an even Karnaugh set of binary values. The first diagnostic handler application sets a first master non-recoverable diagnostic flag to a first encoded fault value if the first non-recoverable diagnostic flag is equal to a second encoded fault value, or the second non-recoverable diagnostic flag is equal to a third encoded fault value.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: July 20, 2021
    Assignee: LG Chem, Ltd.
    Inventor: Kerfegar K. Katrak
  • Patent number: 11069899
    Abstract: The present invention relates to a negative electrode for a secondary battery. The negative electrode for the secondary battery according to an embodiment of the present invention comprises a negative electrode collector and a negative electrode active material integrated with at least a portion of a surface of the negative electrode collector, wherein the negative electrode collector has a plurality of delamination prevention current collection grooves with which the negative electrode active material is integrated, and the negative electrode active material is disposed on an inner surface of each of the delamination prevention current collection grooves so that a space part in which a passivation layer is formed is defined during charging and discharging.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jin Hyun Cho, Hyun Woong Yun
  • Patent number: 11066516
    Abstract: The present invention relates to a polycarbonate resin composition for a light guide plate and an optical molded article using the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color tone uniformity required as the light guide plate, and also is excellent in processability and thus can be usefully used as a material of the light guide plate.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: July 20, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Byoungkue Chun, Moo Ho Hong, Hyong Min Bahn, Un Ko
  • Patent number: 11069858
    Abstract: The present specification provides a compound of Chemical Formula 1, and an organic light emitting device including the same. The compound of Chemical Formula 1 used in one or more organic material layers of an organic light emitting device provides enhanced efficiency, lowered driving voltage, and increased lifetime of the device.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Sung Jae Lee, Jae Seung Ha, Sung Kil Hong
  • Patent number: 11067847
    Abstract: The present specification relates to a wide color gamut film including a transparent substrate; a wide color gamut layer provided on one surface of the transparent substrate, and including a compound including a photocurable functional group and a dye or a pigment having a maximum absorption wavelength of 580 nm to 610 nm; a surface layer provided on the wide color gamut layer, wherein the transparent substrate, the wide color gamut layer and the surface layer are consecutively laminated, and a polarizing plate and a liquid crystal display device including the same.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Hanna Lee, Kyungki Hong, Yeongrae Chang
  • Patent number: 11065556
    Abstract: Provided is a method of separating and purifying a mixture of components having small difference in boiling point, and the method may maximize an energy collecting amount and collect a product to be desired in high purity and high yield.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Sung Kyun Kim, Sung Kyu Lee, Ji Hye Kim, Yong Mann Beyun, Joon Ho Shin
  • Patent number: 11066542
    Abstract: The present invention relates to a method of preparing a thermoplastic resin, a method of preparing a thermoplastic resin composition including the same, and a method of manufacturing an injection-molded article using the thermoplastic resin composition. By using a mixture of molecular weight modifiers having different reactivities according to the present invention, coagulation may be performed using a small amount of coagulant, productivity may be increased, and a molded article, which is manufactured using a thermoplastic resin, having excellent appearance characteristics along with superior mechanical strength, processability, or the like may be provided.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Jong Beom Kim, Joo Byung Chai, Yu Sung Jung, Chang Sull Kim, Eun Seon Park, Tae Young Jeon, Young Min Kim
  • Patent number: 11070067
    Abstract: A battery management unit for a battery module, the battery management unit including a sensing unit electrically connected to a plurality of battery cells, the sensing unit detecting voltage of each battery cell of the plurality of battery cells and outputting a detection signal including voltage information representing the detected voltage, a first power supply unit generating a first operating voltage using a module voltage of the battery module, and a communication unit which operates using the first operating voltage, the communication unit including an antenna, a wireless communication circuit and a first input port, the communication unit receiving the detection signal from the sensing unit through the first input port, testing at least one preset item based on the detection signal, and outputting a RF signal representing a result of the testing through the antenna and the wireless communication circuit.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Keun-Wook Lee, Sang-Hoon Lee, Yean-Sik Choi
  • Patent number: 11069895
    Abstract: An electrode assembly for a solid state battery includes a positive electrode, a negative electrode and a solid electrolyte layer interposed between the positive electrode and the negative electrode. In addition, the binder disposed at the interface between the negative electrode and the solid electrolyte layer, the interface between the positive electrode and the solid electrolyte layer and/or at a predetermined depth from the interface is crosslinked to form a three-dimensional network. In other words, in the electrode assembly, the binder contained in the negative electrode and the solid electrolyte layer and/or the binder contained in the positive electrode and the solid electrolyte layer is crosslinked to improve the interfacial binding force between the negative electrode and the solid electrolyte layer and/or between the positive electrode and the solid electrolyte layer, and thus ion conductivity is maintained to a significantly high level.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: July 20, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Ju Cho, Ho-Suk Shin, Seung-He Woo, Sung-Joong Kang, Hyea-Eun Han
  • Publication number: 20210214501
    Abstract: The present disclosure relates to a polyimide-based resin film which is synthesized by the reaction of an acid anhydride compound and a diamine compound having a specific structure, thereby capable of ensuring excellent flatness even under high temperature heat treatment conditions, and stably maintaining flatness even during further heat treatment, a substrate for display device, and an optical device using the same.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Kyunghwan KIM, Chan Hyo PARK
  • Publication number: 20210218259
    Abstract: The present invention relates to a battery protection circuit for accurately detecting and blocking overcurrent by overcharge and overdischarge by using a power management IC (PMIC) side sensing resistor provided in an external system and connected to a battery without a separate shunt resistor mounted in the battery, and an overcurrent blocking method using the same.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Won Jeon JEONG, Ji Uk JANG
  • Publication number: 20210215767
    Abstract: Provided is a method of calculating a resistance and a capacitance of an energy storage system, including a current application step of applying a predetermined current having a constant value to the energy storage system; a first voltage measurement step of measuring a voltage of the energy storage system while the predetermined current is applied to the energy storage system; a second voltage measurement step of measuring a voltage of the energy storage system after breaking the predetermined current applied to the energy storage system; and a step of calculating a resistance (R) and a capacitance (C) of the energy storage system based on the voltage of the energy storage system measured in the first voltage measurement step, the voltage of the energy storage system measured in the second voltage measurement step, and the predetermined current having the constant value.
    Type: Application
    Filed: February 20, 2019
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventor: Bo Mi LIM
  • Publication number: 20210218029
    Abstract: A negative electrode and a secondary battery including the same are described, the negative electrode including a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a negative electrode active material including SiOx (0?x<2) particles, a conductive material, and a binder, and the negative electrode active material layer includes a lower layer in contact with the current collector, an upper layer positioned on the lower layer, and an intermediate layer positioned between the lower layer and the upper layer.
    Type: Application
    Filed: May 9, 2019
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Je Young KIM, Joo Sung LEE, Suk In NOH, Hee Won LEE
  • Publication number: 20210218058
    Abstract: The present invention relates to a thermosetting electrolyte composition for a lithium secondary battery, a gel polymer electrolyte prepared therefrom, and a lithium secondary battery including the gel polymer electrolyte, and particularly, to a thermosetting electrolyte composition for a lithium secondary battery, which includes LiPF6 as a first lithium salt, a second lithium salt excluding the LiPF6, a non-aqueous organic solvent, and a polymer or oligomer containing a unit represented by Formula 1, a gel polymer electrolyte prepared therefrom, and a lithium secondary battery including the gel polymer electrolyte.
    Type: Application
    Filed: September 10, 2019
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Kyoung Ho AHN, Jung Hoon LEE, Won Kyung SHIN, Jae Won LEE, Sol Ji PARK, Chul Haeng LEE
  • Publication number: 20210215661
    Abstract: The present invention relates to polypropylene non-woven fabric having excellent loft property, a method for preparing polypropylene non-woven fabric having excellent loft property, and a method for evaluating the properties of the polypropylene resin.
    Type: Application
    Filed: June 21, 2019
    Publication date: July 15, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Hyunsup Lee, Seong Min Chae, Kyung Seop Noh, Heekwang Park, Ki Soo Lee, Sangjin Jeon, Myunghan Lee
  • Publication number: 20210215851
    Abstract: The present disclosure provides an optical laminate including: a polymer substrate containing a polymer resin and rubber particles having a cross-sectional diameter of 10 to 500 nm dispersed in the polymer resin; and an antiglare layer containing a binder resin and organic fine particles, nano-inorganic particles and chain-shaped silica dispersed in the binder resin, wherein rubber particles having a cross-sectional diameter of 10 to 500 nm exist within 50% of the thickness of the antiglare layer from the interface between the polymer substrate and the antiglare layer, a polarizing plate including the optical laminate, and a liquid crystal display and a display device including the polarizing plate.
    Type: Application
    Filed: January 8, 2020
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Min Soo KIM, Jung Hyun SEO, Jaehoon SHIM, Jae Pil KOO, Hyung Oh LIM, Jaeyoung KIM
  • Publication number: 20210214497
    Abstract: The present invention relates to a polyamide resin having a main chain having a structure in which two polyamide segments are linked in an alternating way, a preparation method thereof, and a polyamide film and resin laminate including the same.
    Type: Application
    Filed: November 1, 2019
    Publication date: July 15, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Il Hwan CHOI, Young Ji TAE, Soonyong PARK, Youngseok PARK
  • Publication number: 20210218012
    Abstract: A positive electrode for a secondary battery includes a positive electrode active material layer, which includes a positive electrode active material including a lithium transition metal oxide which contains nickel, cobalt, and manganese and has an atomic ratio of nickel in total transition metals of 80 atm % or more, and a metal oxide including a metallic element having a binding potential with lithium of 0.5 V to 4 V. A secondary battery including the positive electrode is also provided.
    Type: Application
    Filed: May 21, 2019
    Publication date: July 15, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Won Sig Jung, Sang Soon Choi, Hyun Ah Park
  • Publication number: 20210218021
    Abstract: A positive electrode active material for a lithium secondary battery includes a lithium composite transition metal oxide including transition metals including nickel (Ni), cobalt (Co), and manganese (Mn), and the lithium composite transition metal oxide is doped with doping elements including cobalt (Co) and titanium (Ti). The lithium composite transition metal oxide includes at least one lithium layer and at least one transition metal layer including the transition metals, and the lithium layer and the transition metal layer are alternately arranged. The thickness of the lithium layer ranges from 2.146 ? to 2.182 ?, and the thickness of the transition metal layer ranges from 2.561 ? to 2.595 ?A.
    Type: Application
    Filed: June 27, 2019
    Publication date: July 15, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Won Tae Kim, Jong Yeol Yu, Seoung Chul Ha, Sun Sik Shin, Hong Kyu Park, Seong Hoon Kang
  • Publication number: 20210218023
    Abstract: Provided is a lithium secondary battery which includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes, as a positive electrode active material, a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 50 atm % to 75 atm % of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing (i.e., LiO6 slab thickness) in a state-of-charge (SOC) range of 58% to 86%.
    Type: Application
    Filed: June 20, 2019
    Publication date: July 15, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Dong Joon Ahn, Seo Hee Ju, Sung Soon Park, Kang Hyeon Lee