Patents by Inventor Jae-Chul Um

Jae-Chul Um 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).

  • Positive electrode for lithium secondary battery and lithium secondary battery having the same
    Patent number: 9786904
    Abstract: A positive electrode for a lithium secondary battery includes a positive activation material mixture that intercalates and de-intercalates lithium ions, wherein a first positive activation material having an average particle diameter D50 of from 12.5 ?m to 22 ?m and a second positive activation material having an average particle diameter D50 of from 1 ?m to 5 ?m are mixed with a weight ratio of from 95:5 to 60:40.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: October 10, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung Joon Park, Jae Chul Um, Myung Hyo Shin
  • POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY HAVING THE SAME
    Publication number: 20140154580
    Abstract: A positive electrode for a lithium secondary battery includes a positive activation material mixture that intercalates and de-intercalates lithium ions, wherein a first positive activation material having an average particle diameter D50 of from 12.5 ?m to 22 ?m and a second positive activation material having an average particle diameter D50 of from 1 ?m to 5 ?m are mixed with a weight ratio of from 95:5 to 60:40.
    Type: Application
    Filed: February 4, 2014
    Publication date: June 5, 2014
    Applicant: SAMSUNG SDI CO., LTD
    Inventors: Jung Joon Park, Jae Chul Um, Myung Hyo Shin
  • Positive electrode including particles having bimodal size distribution for lithium secondary battery and lithium secondary battery having the same
    Patent number: 8691445
    Abstract: A positive electrode for a lithium secondary battery includes a positive activation material mixture that intercalates and de-intercalates lithium ions, wherein a first positive activation material having an average particle diameter D50 of from 12.5 ?m to 22 ?m and a second positive activation material having an average particle diameter D50 of from 1 ?m to 5 ?m are mixed with a weight ratio of from 95:5 to 60:40.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: April 8, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung Joon Park, Jae Chul Um, Myung Hyo Shin
  • Secondary battery and manufacturing method thereof
    Patent number: 8334066
    Abstract: A secondary battery having a simplified structure by which a lead of a safety device can be adhered to the battery includes an electrode unit having a positive electrode plate, a negative electrode plate and a separator disposed therebetween, a can having a bottom portion and made of aluminum or an aluminum alloy, the can in which the electrode unit and an electrolytic solution are accommodated and sealed, and a surface coating provided on at least an outer surface of the bottom portion of the can to which the lead is attached.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: December 18, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Eui-Sun Hong, Sung-Jae Cho, Masaki Koike, Yasuaki Hiramura, Jin-Uk Lee, Jae-Chul Um, Jung-Joon Park
  • Positive active material for lithium secondary battery and method of preparing same
    Patent number: 7790318
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: September 7, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND METHOD OF PREPARING SAME
    Publication number: 20100151121
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Application
    Filed: February 26, 2010
    Publication date: June 17, 2010
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • Positive active material for lithium secondary battery and method of preparing same
    Patent number: 7695869
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: April 13, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • Secondary battery
    Patent number: 7691525
    Abstract: A secondary battery comprising a heat-sensitive indicator on the outer surface of the battery is disclosed. The color of the heat-sensitive indicator changes according to battery temperature. The heat-sensitive indicator may comprise a sheath. When the internal temperature of the battery increases rapidly, the heat-sensitive indicator changes color to alert the user that the battery is abnormally hot.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: April 6, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Jae Chul Um
  • Positive active material for lithium secondary battery and method of preparing same
    Patent number: 7674553
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: March 9, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND METHOD OF PREPARING SAME
    Publication number: 20090127504
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Application
    Filed: January 15, 2009
    Publication date: May 21, 2009
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • Positive active material for lithium secondary battery and method of preparing same
    Publication number: 20050181281
    Abstract: Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2?=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2?=22° (003 plane) in X-ray diffraction patterns using a CoK?-ray, LixCoO2-yAy??(1) wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.
    Type: Application
    Filed: February 16, 2005
    Publication date: August 18, 2005
    Inventors: Jung-Joon Park, Su-Ho Song, Wan-Seog Oh, Jae-Chul Um
  • Secondary battery and manufacturing method thereof
    Publication number: 20040137322
    Abstract: A secondary battery having a simplified structure by which a lead of a safety device can be adhered to the battery includes an electrode unit having a positive electrode plate, a negative electrode plate and a separator disposed therebetween, a can having a bottom portion and made of aluminum or an aluminum alloy, the can in which the electrode unit and an electrolytic solution are accommodated and sealed, and a surface coating provided on at least an outer surface of the bottom portion of the can to which the lead is attached.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 15, 2004
    Applicant: Samsung SDI CO., Ltd.
    Inventors: Eui-Sun Hong, Sung-Jae Cho, Masaki Koike, Yasuaki Hiramura, Jin-Uk Lee, Jae-Chul Um, Jung-Joon Park