Patents by Inventor Yo Jin Kim
Yo Jin Kim 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).
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Patent number: 11673311Abstract: An apparatus for manufacturing a pouch includes a die in which a pair of forming grooves are formed with a partition wall therebetween in a top surface thereof; and a pair of punches disposed above the die configured to form a pair of accommodation parts in a pouch film while being respectively inserted into the pair of forming grooves in a state of pressing the pouch film, wherein a pressing surface of each of the punches, which is configured to press the pouch film, has an inclined angle that is inclined upward from one end thereof disposed at a side of the partition wall toward an opposite end thereof.Type: GrantFiled: February 27, 2019Date of Patent: June 13, 2023Inventors: Jin Ook Suh, Sung Joon Park, Yo Jin Kim
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Publication number: 20200343536Abstract: A lithium secondary battery includes a positive electrode including a lithium manganese-based first positive electrode active material having a spinel structure doped and coated and a lithium nickel-manganese-cobalt-based second positive active material, a negative electrode including artificial graphite having a specific surface area (BET) of 0.1-1.2 m2/g and at least one selected from the group consisting of soft carbon and natural graphite which have a greater specific surface area than the artificial graphite, a separator interposed between the positive electrode and the negative electrode, and an electrolyte.Type: ApplicationFiled: November 6, 2018Publication date: October 29, 2020Applicant: LG Chem, Ltd.Inventors: Min Won Suh, So Yeon Kim, Nan Ji Yun, Yo Jin Kim, Sae Young Oh, Hui Kyoung Kim
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Publication number: 20200331187Abstract: An apparatus for manufacturing a pouch, includes a die in which a pair of forming grooves are formed with a partition wall therebetween in a top surface thereof; and a pair of punches disposed above the die configured to form a pair of accommodation parts in a pouch film while being respectively inserted into the pair of forming grooves in a state of pressing the pouch film, wherein a pressing surface of each of the punches, which is configured to press the pouch film, has an inclined angle that is inclined upward from one end thereof disposed at a side of the partition wall toward an opposite end thereof.Type: ApplicationFiled: February 27, 2019Publication date: October 22, 2020Applicant: LG Chem, Ltd.Inventors: Jin Ook Suh, Sung Joon Park, Yo Jin Kim
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Patent number: 10516154Abstract: Disclosed is a positive electrode for a lithium secondary battery which uses a positive electrode active material containing secondary particles with a relatively weak particle strength to improve the adhesion between a positive electrode mixture layer and a current collector, and the positive electrode includes a positive electrode current collector; a primer coating layer including a first polymer binder and a first conductive material, having surface roughness (Ra) of 85 nm to 300 nm and formed on at least one surface of the positive electrode current collector; and a positive electrode mixture layer formed on an upper surface of the primer coating layer and including a positive electrode active material containing secondary particles with a compressive breaking strength of 1 to 15 MPa, a second polymer binder and a second conductive material.Type: GrantFiled: June 29, 2017Date of Patent: December 24, 2019Assignee: LG Chem, Ltd.Inventors: Jong-Heon Seol, Jin-Young Son, Hyung-Suk Cho, Sin-Young Jung, Yoon-Jung Choi, Yo-Jin Kim, Je-Young Kim, Sung-Joon Park, Jung-Keun Yoo, Sang-Hoon Choy
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Publication number: 20180006289Abstract: Disclosed is a positive electrode for a lithium secondary battery which uses a positive electrode active material containing secondary particles with a relatively weak particle strength to improve the adhesion between a positive electrode mixture layer and a current collector, and the positive electrode includes a positive electrode current collector; a primer coating layer including a first polymer binder and a first conductive material, having surface roughness (Ra) of 85 nm to 300 nm and formed on at least one surface of the positive electrode current collector; and a positive electrode mixture layer formed on an upper surface of the primer coating layer and including a positive electrode active material containing secondary particles with a compressive breaking strength of 1 to 15 MPa, a second polymer binder and a second conductive material.Type: ApplicationFiled: June 29, 2017Publication date: January 4, 2018Applicant: LG Chem, Ltd.Inventors: Jong-Heon Seol, Jin-Young Son, Hyung-Suk Cho, Sin-Young Jung, Yoon-Jung Choi, Yo-Jin Kim, Je-Young Kim, Sung-Joon Park, Jung-Keun Yoo, Sang-Hoon Choy
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Patent number: 9859551Abstract: The present disclosure refers to an anode for a secondary battery that comprises a low-temperature additive, and an electrochemical device using the anode. More specifically, the present disclosure provides a carbon-based anode material comprising a low-temperature additive such as lithium titanium oxide (LTO) to improve low-temperature output characteristics, thereby providing high output at room temperature and even a low temperature, and an electrochemical device using the anode.Type: GrantFiled: October 16, 2014Date of Patent: January 2, 2018Assignee: LG CHEM, LTD.Inventors: Hyun-Kyung Do, Yo-Jin Kim, Woo-Ha Kim, Soul-Gie Hong, Joo-Young Choi, Hyun-Soo Kwon, Kang-Kun Kim, Hyun-Chul Roh
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Patent number: 9799859Abstract: Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.Type: GrantFiled: January 4, 2012Date of Patent: October 24, 2017Assignee: LG CHEM, LTD.Inventors: Chang Moon Jeong, Chang Ho Kim, Seung Don Choi, Min Chul Jang, Seung Taek Hong, In Cheol Shin, Nan Ji Yun, Dal Mo Kang, Yo Jin Kim, Yong Kyu Ju, You Rim Yoon, Sang Yoon Jeong, Seung Su Cho, Soul Gie Hong, Jun Seok Choi
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Publication number: 20160268589Abstract: The present disclosure refers to an anode for a secondary battery that comprises a low-temperature additive, and an electrochemical device using the anode. More specifically, the present disclosure provides a carbon-based anode material comprising a low-temperature additive such as lithium titanium oxide (LTO) to improve low-temperature output characteristics, thereby providing high output at room temperature and even a low temperature, and an electrochemical device using the anode.Type: ApplicationFiled: October 16, 2014Publication date: September 15, 2016Applicant: LG CHEM, LTD.Inventors: Hyun-Kyung DO, Yo-Jin KIM, Woo-Ha KIM, Soul-Gie HONG, Joo-Young CHOI, Hyun-Soo KWON, Kang-Kun KIM, Hyun-Chul ROH
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Publication number: 20130323580Abstract: Disclosed is a secondary battery with improved long-term reliability for humidity penetration. The pouch-type secondary battery includes an electrode assembly to which an electrode lead is attached, and a pouch package accommodating the electrode assembly so that the electrode lead is partially exposed outwards, the pouch package having a sealing portion formed along an edge thereof, wherein the sealing portion has a characteristic length of 10 to 19 mm2/mm. Since a characteristic length of a sealing portion of a pouch-type secondary battery is restricted to a predetermined range, it is possible to improve long-term reliability of the secondary battery for humidity penetration while suppressing the decrease of capacity of the secondary battery, caused by the area occupied by the sealing portion, to the minimum.Type: ApplicationFiled: August 8, 2013Publication date: December 5, 2013Applicant: LG Chem, Ltd.Inventors: Yo-Jin Kim, Seung-Don Choi, Sung-Joon Park
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Patent number: 8580419Abstract: Provided is a secondary battery comprising a separator having an inorganic layer wherein active sites of inorganic particles in the inorganic layer are modified into non-reactive sites. Use of the separator leads to improvements in wettability of an electrolyte and thermoelectric stability and storage characteristics of the secondary battery. Provided is also a method of manufacturing the same secondary battery.Type: GrantFiled: August 24, 2012Date of Patent: November 12, 2013Assignee: LG Chem, Ltd.Inventors: Yo Jin Kim, Seung Don Choi, Han Ho Lee
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Publication number: 20130295448Abstract: Provided are an electrolyte which may prevent the degradation of the battery performance by including a functional group which can react with a side reaction site which is responsible for decomposition of negative electrode material components and a functional group which can react with moisture which is responsible for decomposition of positive electrode material components in an electrolyte of the battery to ensure the stability of the battery at high temperatures, and a secondary battery manufactured by adding the same. The present invention may employ a compound including a functional group which can react with a side reaction site of a negative electrode material and a functional group which can react with moisture to maximize the improvement of the storage performance of a secondary battery at high temperatures.Type: ApplicationFiled: July 1, 2013Publication date: November 7, 2013Inventors: Yo Jin KIM, Han Ho LEE, Seung Don CHOI
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Patent number: 8501355Abstract: Provided are an electrolyte which may prevent the degradation of the battery performance by including a functional group which can react with a side reaction site which is responsible for decomposition of negative electrode material components and a functional group which can react with moisture which is responsible for decomposition of positive electrode material components in an electrolyte of the battery to ensure the stability of the battery at high temperatures, and a secondary battery manufactured by adding the same. The present invention may employ a compound including a functional group which can react with a side reaction site of a negative electrode material and a functional group which can react with moisture to maximize the improvement of the storage performance of a secondary battery at high temperatures.Type: GrantFiled: March 2, 2010Date of Patent: August 6, 2013Assignee: LG Chem, Ltd.Inventors: Yo Jin Kim, Han Ho Lee, Seung Don Choi
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Patent number: 8338026Abstract: Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 ?m and a maximum particle diameter of less than about 1 ?m; and a large-diameter active material having an average particle diameter of about 5 ?m to about 20 ?m and a maximum particle diameter of less than about 100 ?m.Type: GrantFiled: May 27, 2010Date of Patent: December 25, 2012Assignee: LG Chem, Ltd.Inventors: Seung-Taek Hong, Hey Woong Park, Ho Jin Jeon, Sung Joon Park, Dae Sik Choi, Nan Ji Yun, Yo Jin Kim, Seung Don Choi
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Publication number: 20120321933Abstract: Provided is a secondary battery comprising a separator having an inorganic layer wherein active sites of inorganic particles in the inorganic layer are modified into non-reactive sites. Use of the separator leads to improvements in wettability of an electrolyte and thermoelectric stability and storage characteristics of the secondary battery. Provided is also a method of manufacturing the same secondary battery.Type: ApplicationFiled: August 24, 2012Publication date: December 20, 2012Applicant: LG CHEM, LTD.Inventors: Yo Jin Kim, Seung Don Choi, Han Ho Lee
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Patent number: 8277981Abstract: Provided is a secondary battery comprising a separator having an inorganic layer wherein active sites of inorganic particles in the inorganic layer are modified into non-reactive sites. Use of the separator leads to improvements in wettability of an electrolyte and thermoelectric stability and storage characteristics of the secondary battery. Provided is also a method of manufacturing the same secondary battery.Type: GrantFiled: November 21, 2008Date of Patent: October 2, 2012Assignee: LG Chem, Ltd.Inventors: Yo Jin Kim, Seung Don Choi, Han Ho Lee
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Publication number: 20120156560Abstract: Provided is a positive electrode active material. The positive electrode active material includes: a small-diameter active material having an average particle diameter of about 0.5 ?m and a maximum particle diameter of less than about 1 ?m; and a large-diameter active material having an average particle diameter of about 5 ?m to about 20 ?m and a maximum particle diameter of less than about 100 ?m.Type: ApplicationFiled: May 27, 2010Publication date: June 21, 2012Applicant: LG CHEM. LTD.Inventors: Seung-Taek Hong, Hey Woong Park, Ho Jin Jeon, Sung Joon Park, Dae Sik Choi, Nan Ji Yun, Yo Jin Kim, Seung Don Choi
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Publication number: 20120114990Abstract: Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.Type: ApplicationFiled: January 4, 2012Publication date: May 10, 2012Inventors: Chang Moon Jeong, Chang Ho Kim, Seung Don Choi, Min Chul Jang, Seung Taek Hong, In Cur Shin, Nan Ji Yun, Dal Mo Kang, Yo Jin Kim, Yong Kyu Ju, You Rim Yoon, Sang Yoon Jeong, Seung Su Cho, Soul Gie Hong, Jun Seok Choi
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Publication number: 20120028133Abstract: Provided are an electrolyte which may prevent the degradation of the battery performance by including a functional group which can react with a side reaction site which is responsible for decomposition of negative electrode material components and a functional group which can react with moisture which is responsible for decomposition of positive electrode material components in an electrolyte of the battery to ensure the stability of the battery at high temperatures, and a secondary battery manufactured by adding the same. The present invention may employ a compound including a functional group which can react with a side reaction site of a negative electrode material and a functional group which can react with moisture to maximize the improvement of the storage performance of a secondary battery at high temperatures.Type: ApplicationFiled: March 2, 2010Publication date: February 2, 2012Applicant: LG CHEM, LTD.Inventors: Yo Jin Kim, Han Ho Lee, Seung Don Choi
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Publication number: 20100255382Abstract: Provided is a secondary battery comprising a separator having an inorganic layer wherein active sites of inorganic particles in the inorganic layer are modified into non-reactive sites. Use of the separator leads to improvements in wettability of an electrolyte and thermoelectric stability and storage characteristics of the secondary battery. Provided is also a method of manufacturing the same secondary battery.Type: ApplicationFiled: November 21, 2008Publication date: October 7, 2010Applicant: LG CHEM, LTD.Inventors: Yo Jin Kim, Seung Don Choi, Han Ho Lee