Patents Assigned to SK INNOVATIONS CO., LTD.
  • Relay examination device and battery management system
    Patent number: 11340297
    Abstract: The present disclosure relates to a relay examination device and a battery management system including the same, the relay examination device includes a first resistor unit having one end connected to one end of a relay, a second resistor unit having one end connected to the other end of the first resistor unit, a power unit connected to the other end of the second resistor unit and configured to supply power, and a control unit configured to receive a voltage signal applied between the first resistor unit and the second resistor unit and to examine whether the relay is open or closed or whether the relay has malfunctioned.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: May 24, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Byoung Kyu Park, Ho Sang Jang, Seon Yong Kim, Yong Sug Choi
  • Acid-resistant yeast with suppressed ethanol production pathway and method for producing lactic acid using same
    Patent number: 11339398
    Abstract: The present invention relates to an acid-resistant yeast endowed with a lactic acid production ability and having a suppressed ethanol production pathway, and a method for producing lactic acid using same. According to the present invention, by effectively suppressing the production of ethanol in an acid-resistant yeast, and by expressing an LDH enzyme with strong expression and high efficiency, it is possible to produce lactic acid with high yield even at low pH without degrading growth.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: May 24, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Jae Yeon Park, Tae Young Lee, Ki Sung Lee
  • Electrolyte for lithium secondary battery and lithium secondary battery including the same
    Patent number: 11335953
    Abstract: Provided are an electrolyte for a secondary battery including a lithium salt, a nonaqueous organic solvent, and a difluorophosphite olefin compound, and a lithium secondary battery including the same.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: May 17, 2022
    Assignee: SK Innovation Co., Ltd.
    Inventors: In Haeng Cho, Hyo Shin Kwak, Joo Hyun Lee, Dai In Park
  • Method for preparing a linear alpha olefin including oxygen removal from the feed
    Patent number: 11325874
    Abstract: Provided is a method for preparing a linear alpha olefin using a chromium-based catalyst, including the steps of: removing oxygen impurities by contacting an olefin with an oxygen adsorbent; injecting the olefin from which the oxygen impurities are removed; a chromium-based catalyst into a reactor; and oligomerizing the olefin in the reactor.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 10, 2022
    Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
    Inventors: Chansaem Park, Hyoseung Park, Sungreal Son, Inhyoup Song, Woosung Jung
  • Lithium secondary battery
    Patent number: 11322735
    Abstract: Provided is a lithium secondary battery. The lithium secondary battery includes a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a mixed negative electrode active material including graphite particles and low crystalline carbon-based particles, and the negative electrode active material layer has an apex of an exothermic peak in a temperature range of no less than 370° C. and no more than 390° C., as measured by differential scanning calorimetry (DSC).
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: May 3, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Jong Hyuk Lee, Dock Young Yoon, Hee Gyoung Kang
  • Method for manufacturing polymer film
    Patent number: 11318722
    Abstract: The present invention provides a method for manufacturing a polymer film, the method comprising the steps of: drying a polymer precursor to form a precursor film; and curing the precursor film to form a polymer film, wherein the drying is performed such that the content of a solvent remaining in the precursor film after the drying is 30% or less.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: May 3, 2022
    Assignees: SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
    Inventors: Seung-Min Jeon, Weon-Jung Choi, Sang-Yoon Park, Jin-Hyung Park
  • Composite separator including porous substrate, heat-resistant coating layer, and electrode adhesive layer and electrochemical device using the same
    Patent number: 11322800
    Abstract: Provided are a separator for a secondary battery and an electrochemical device using the same. More specifically, provided is a composite separator having a more excellent cycle life and including a coating layer which is not easily swollen in an electrolyte solution. In the composite separator for a secondary battery according to an aspect of the present invention, distortion or lifting phenomenon is suppressed even when the heat and pressure are applied without significant decrease in permeability of the separator.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: May 3, 2022
    Assignees: SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
    Inventors: Won Sub Kwack, Min Sang Park, Yun Bong Kim, Dong Yeon Lee, Kyu Young Cho
  • High voltage battery rack
    Patent number: 11309605
    Abstract: The present invention provides a high voltage battery rack, including: a plurality of battery modules electrically connected with each other; and a rack controller configured to control the plurality of battery modules, wherein each of the plurality of battery modules comprises: external terminals; and an MSD module configured to determine whether a voltage is applied to the external terminals during operation.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 19, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Dae Won Kwon, Yong Uk Kim
  • Method for preparing paraffin
    Patent number: 11306043
    Abstract: The present invention relates to a method for preparing paraffin, and can provide a method for preparing paraffin including a hydrogenation step of by-products of a process for preparing linear alpha olefins. Since the method for preparing paraffin of the present invention can convert the by-products of the process for preparing linear alpha olefins to paraffin at a high conversion ratio, it is possible to increase the added value of the by-products.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: April 19, 2022
    Assignees: SK Innovation Co., Ltd., SK Global Chemical Co., Ltd.
    Inventors: Sungreal Son, Jisun Choi, Chansaem Park, Hyo Seung Park, In Hyoup Song, Woo Sung Jung, Jae Suk Choi, Daehyun Choo
  • Control system and method for detecting ground fault
    Patent number: 11300629
    Abstract: A rack BMS detects a ground fault through a circuit embedded therein, and as a master BMS is configured to disconnect all the connections between battery racks and a grid in the case in which the rack BMS detects the ground fault, no more current flows through chassis, thereby protecting the battery racks and ensuring safety of a person using the battery racks.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 12, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Yong Uk Kim, Dae Won Kwon
  • Apparatus for measuring insulation resistance
    Patent number: 11293991
    Abstract: An apparatus for measuring an insulation resistance according to the present invention includes: a first distribution resistor connected to a positive terminal of a battery and a ground; a first switch connected to the positive terminal of the battery and the first distribution resistor; a second distribution resistor connected to a negative terminal of the battery and the ground; a second switch connected to the negative terminal the battery and the second distribution resistor; and an insulation resistance measurement unit measuring a resistance value of a negative electrode insulation resistor of the battery using a first voltage applied to the first distribution resistor and measuring a resistance value of a positive electrode insulation resistor of the battery using a second voltage applied to the second distribution resistor.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: April 5, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Ho Sang Jang, Seon Yong Kim, Byoung Kyu Park, Yong Sug Choi
  • Method for preparing polymer film
    Patent number: 11279113
    Abstract: The present invention provides a method for preparing a polymer film, comprising the steps of: forming a precursor film by drying a polymer precursor; and forming a polymer film by curing the precursor film, wherein the curing of the precursor film is carried out on a substrate film.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: March 22, 2022
    Assignees: SK INNOVATION CO., LTD., SK IE TECHNOLOGY CO., LTD.
    Inventors: Seung-Min Jeon, Jin-Hyung Park, Sang-Yoon Park
  • Superwide pouch type secondary battery with double tabs
    Patent number: 11276873
    Abstract: Provided is a superwide pouch type secondary battery comprising an electrode assembly including a cathode plate, an anode plate, and a separator; a pouch surrounding the electrode assembly; and electrode tabs connected to both ends of the electrode assembly and protruding outward of the pouch, wherein the electrode tabs connected to the both ends of the electrode assembly include one or more cathode tabs and anode tabs, respectively, and width of battery cell is more than 4 times longer than height of battery cell such that loading efficiency of the pouch type secondary battery into a vehicle and an energy density may be improved without increasing an internal electrode.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: March 15, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Dong Ju Kim, Jin Go Kim, Bo Hyun Lee
  • Pouch secondary battery and method of fabricating the same
    Patent number: 11276893
    Abstract: A pouch secondary battery is disclosed. One aspect of the present invention provides a pouch secondary battery including a casing configured to accommodate an electrode assembly from which electrode tabs are led; and the casing includes a sealing portion formed on three sides of four sides of the pouch secondary battery and a close contact portion formed on the remaining one side; and an extending portion protruding perpendicularly with respect to the close contact portion is formed in a portion adjacent to the close contact portion in the sealing portion.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: March 15, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Tae Il Kim, Dong Ju Kim, Sung Yeop Kim, Jin Go Kim, Seung Noh Lee
  • Bus bar and battery pack including the same
    Patent number: 11271271
    Abstract: A bus bar includes terminal portions disposed at both ends, respectively; a plurality of bridges disposed between the terminal portions to electrically connect the terminal portions, and to be sequentially fused when an overcurrent flows. The plurality of bridges may be configured to have different resistance values, respectively.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: March 8, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Sol San Son, Dong Ha Hwang, Seok Min Kim, Seo Roh Rhee, Ji Seok Lee, Gyu Jin Chung, Seung Hoon Ju, Yang Kyu Choi
  • Lithium secondary battery and method of manufacturing the same
    Patent number: 11271194
    Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a concentration gradient and has a secondary particle structure formed from an assembly of primary particles. The second cathode active material particle includes a lithium metal oxide having a single particle structure. The first and second cathode active material particles each includes at least two metals except from lithium, and an amount of nickel is the largest among those of the metals in each of the first and second cathode active material particles.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 8, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Soo Ho Kim, Min Gu Kang, Young Hoon Do, Yong Hyun Cho
  • Battery rack
    Patent number: 11258126
    Abstract: The present invention provides a battery rack including: a housing; a plurality of battery modules stacked in the housing; and a connection member configured to electrically connect the plurality of battery modules, wherein each of the plurality of battery modules includes a plurality of battery submodules stacked on each other, and each of the plurality of battery submodules comprises: at least one cooling member; and a plurality of battery cells located on both sides with the at least one cooling member interposed therebetween, wherein at least two of the plurality of battery cells are located on each of both sides of the at least one cooling member.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: February 22, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Dae Won Kwon, Yong Uk Kim
  • Isoprene synthase and method of preparing isoprene using thereof
    Patent number: 11254922
    Abstract: Provided are a novel isoprene synthase derived from sweet potato and a method of preparing isoprene using the same, and more specifically, a novel isoprene synthase derived from sweet potato, a gene encoding the isoprene synthase, a host cell transformed with the gene, and a method of preparing isoprene using the same. The isoprene synthase of the present invention may have higher isoprene productivity as compared to isoprene synthases known in the related art to thereby be effectively used in isoprene biosynthesis and preparation of an isoprene polymer using the same.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: February 22, 2022
    Assignee: SK Innovation Co., Ltd.
    Inventors: Merja Oja, Anne Huuskonen, Marja Ilmén, Jae Hoon Jo, Simon MoonGeun Jung, Outi Koivistoinen, Sang Min Lee, Laura Ruohonen
  • Lithium secondary battery
    Patent number: 11251423
    Abstract: Provided is a lithium secondary battery containing a cathode active material capable of preventing decreases in power and cycle life occurring at the time of adding a sulfur based additive used in order to improve high-temperature storage characteristics to an electrolyte.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: February 15, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Duck Chul Hwang, Kyung Bin Yoo, Kook Hyun Han
  • Lithium secondary battery
    Patent number: 11251425
    Abstract: Provided is a lithium secondary battery including a cathode containing a cathode active material in which a central part has a different concentration from a surface part, and a conductive material having a specific composition ratio, and specifically, a lithium secondary battery including a cathode containing a cathode active material in which a central part of one or more kinds of metals configuring the cathode active material has a different concentration from a surface part thereof, and two or more kinds of conductive materials mixed at a specific ratio, thereby having excellent stability and high low-temperature characteristic and high output characteristic as compared to a conventional lithium secondary battery.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 15, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang