Patents by Inventor Young-pil Choi
Young-pil Choi 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: 10892478Abstract: Provided are a negative electrode active material for a secondary battery, which suppresses a dispersal phenomenon of a negative electrode active material during charging/discharging by controlling a lattice mismatch ratio of an amorphous matrix layer to a silicon layer in a silicon-based negative electrode active material.Type: GrantFiled: May 31, 2016Date of Patent: January 12, 2021Inventors: Cheol Ho Park, Min Hyun Kim, Young Pil Choi, Seon Kyong Kim
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Patent number: 10734644Abstract: Provided are a negative electrode active material for a secondary battery, in which a silicon-based negative electrode active material is formed in a three-layer structure including an amorphous matrix, thereby suppressing a dispersal phenomenon of the negative electrode active material during charging/discharging. The negative electrode active material having a three-layer structure includes: a silicon (Si) layer; an amorphous matrix layer outside the Si layer; and a nano grain matrix layer formed on an interface between the Si layer and the amorphous matrix layer.Type: GrantFiled: May 31, 2016Date of Patent: August 4, 2020Assignee: Iljin Electric Co., Ltd.Inventors: Cheol Ho Park, Min Hyun Kim, Young Pil Choi, Seon Kyong Kim
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Patent number: 10610926Abstract: Disclosed is a continuous rapid solidification apparatus, which includes a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; and two or more molten metal supplies configured to melt raw material metal and alternately supply the crucible with the molten metal.Type: GrantFiled: October 19, 2015Date of Patent: April 7, 2020Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim
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Patent number: 10589350Abstract: Disclosed is a continuous rapid solidification apparatus, which has a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.Type: GrantFiled: October 19, 2015Date of Patent: March 17, 2020Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim
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Patent number: 10566616Abstract: Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—?xTiyFezAlu where x, y, z, and u are at %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.Type: GrantFiled: December 1, 2015Date of Patent: February 18, 2020Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim, Seon Kyong Kim
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Patent number: 10297856Abstract: The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu??(1) where x, y, z and u are atomic %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.Type: GrantFiled: February 26, 2016Date of Patent: May 21, 2019Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim, Seon Kyong Kim
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Patent number: 10283766Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.Type: GrantFiled: December 9, 2014Date of Patent: May 7, 2019Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Cheol Ho Park, Seon Kyong Kim, Seung Chul Lee, Young Pil Choi, Hyang Yeon Kim, Jae Woong Kim, Min Seok Sung
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Publication number: 20180287149Abstract: Disclosed is a negative active material, which has a small change in a volume during charge/discharge, has enhanced initial efficiency and capacity maintenance characteristics. A fine crystalline region exists on a matrix of an alloy, and lithium is more easily dispersed due to the fine crystalline region. The negative active material for a secondary battery has an improved expansion rate, and is formed by a formula below, and its expansion rate after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%.Type: ApplicationFiled: November 18, 2015Publication date: October 4, 2018Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim, Seon Kyong Kim
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Publication number: 20180190977Abstract: Provided are a negative electrode active material for a secondary battery, in which a silicon-based negative electrode active material is formed in a three-layer structure including an amorphous matrix, thereby suppressing a dispersal phenomenon of the negative electrode active material during charging/discharging. The negative electrode active material having a three-layer structure includes: a silicon (Si) layer; an amorphous matrix layer outside the Si layer; and a nano grain matrix layer formed on an interface between the Si layer and the amorphous matrix layer.Type: ApplicationFiled: May 31, 2016Publication date: July 5, 2018Inventors: Cheol Ho Park, Min Hyun Kim, Young Pil Choi, Seon Kyong Kim
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Publication number: 20180175380Abstract: Provided are a negative electrode active material for a secondary battery, which suppresses a dispersal phenomenon of a negative electrode active material during charging/discharging by controlling a lattice mismatch ratio of an amorphous matrix layer to a silicon layer in a silicon-based negative electrode active material.Type: ApplicationFiled: May 31, 2016Publication date: June 21, 2018Inventors: Cheol Ho Park, Min Hyun Kim, Young Pil Choi, Seon Kyong Kim
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Publication number: 20170352911Abstract: The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu??(i) where x, y, z and u are atomic %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.Type: ApplicationFiled: February 26, 2016Publication date: December 7, 2017Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim, Seon Kyong Kim
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Publication number: 20170331105Abstract: Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—?xTiyFezAlu where x, y, z, and u are at %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.Type: ApplicationFiled: December 1, 2015Publication date: November 16, 2017Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim, Seon Kyong Kim
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Publication number: 20170320130Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; and two or more molten metal supplies configured to melt raw material metal and sequentially supply the crucible with the molten metal.Type: ApplicationFiled: October 19, 2015Publication date: November 9, 2017Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim
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Publication number: 20170312814Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.Type: ApplicationFiled: October 19, 2015Publication date: November 2, 2017Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Min Hyun Kim, Myeong Han Kim
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Patent number: 9722243Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%. Formula: SixTiyFezAlu (x, y, z, and u are at %, x: 1?(y+z+u)).Type: GrantFiled: November 18, 2015Date of Patent: August 1, 2017Assignee: ILJIN ELECTRIC CO., LTD.Inventors: Cheol-Ho Park, Seon-Kyong Kim, Young-Pil Choi, Min-Hyun Kim, Myeong-Han Kim
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Publication number: 20160372745Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy including silicon (Si), copper (cu), and aluminum (Al) of 40 to 70 at %, wherein the ratio of aluminum (Al) to copper (Cu) included in the alloy is substantailly 10:90 to 30:70, and the alloy further includes iron (Fe), and further includes zirconium (Zr) or titanium (Ti).Type: ApplicationFiled: February 10, 2015Publication date: December 22, 2016Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Young Pil Choi, Cheol Ho Park, Seon Kyong Kim, Hyang Yeon Kim, Seung Chul Lee, Jae Woong Kim, Min Seok Sung
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Publication number: 20160329561Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.Type: ApplicationFiled: December 9, 2014Publication date: November 10, 2016Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Cheol Ho Park, Seon Kyong Kim, Seung Chul Lee, Young Pil Choi, Hyang Yeon Kim, Jae Woong Kim, Min Seok Sung
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Publication number: 20160315318Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes: silicon (Si) of 40 to 60 at %; and an alloy including copper (Cu) and aluminum (Al), in which a ratio of the aluminum (Al) to the copper (Cu) included in the alloy is 30:70 to 65:35, and the silicon (Si) does not substantially form an intermetallic compound within the alloy.Type: ApplicationFiled: December 9, 2014Publication date: October 27, 2016Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Cheol Ho Park, Seon Kyong Kim, Young Pil Choi, Hyang Yeon Kim, Min Seok Sung, Seung Chul Lee, Jae Woong Kim
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Publication number: 20160149213Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%.Type: ApplicationFiled: November 18, 2015Publication date: May 26, 2016Applicant: ILJIN ELECTRIC CO., LTD.Inventors: Cheol-Ho Park, Seon-Kyong Kim, Young-Pil Choi, Min-Hyun Kim, Myeong-Han Kim
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Patent number: RE44291Abstract: A secondary battery having a cap assembly, including an electrode assembly; a case in which the electrode assembly is located; a cap assembly having a cap plate coupled to and hermetically sealing the case. A terminal member has a head with a stepped protrusion penetrating the cap plate and insulated from the cap plate by an insulating member. The stepped protrusion presses the insulating member in multiple steps. The terminal member is connected to a positive or negative electrode terminal of the electrode assembly.Type: GrantFiled: September 9, 2010Date of Patent: June 11, 2013Assignee: Samsung SDI Co., Ltd.Inventors: Kyong-Jin Kim, Young-Bae Sohn, Jang-Ho Yoon, Young-Pil Choi