Patents by Inventor Sol-Nip LEE
Sol-Nip LEE 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: 11923567Abstract: The present invention relates to a battery cell for evaluating an internal short circuit, and a method for evaluating using the battery cell, wherein an internal short circuit state of a battery cell can be easily induced and, at the same time, an effective internal short circuit evaluation is possible, and the battery cell comprising: first and second electrodes which comprise a coated region on which an electrode mixture layer is coated on a metal current collector and a non-coated region on which an electrode mixture layer is not coated, and which comprise first and second electrode tabs which protrude in one direction from the coated region and do not have an electrode mixture layer coated thereon.Type: GrantFiled: December 10, 2020Date of Patent: March 5, 2024Assignee: LG ENERGY SOLUTION, LTD.Inventors: Sol Nip Lee, Jeong Min Yang
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Patent number: 11777080Abstract: Provided herein are a negative electrode and a secondary battery including the same. In particular, the negative electrode includes: a current collector; a first active material layer including first active material particles and disposed on the current collector; and a second active material layer including second active material particles and disposed on the first active material layer, in which a lithium ion diffusion rate of the second active material particles is two to three times that of the first active material particles.Type: GrantFiled: July 4, 2017Date of Patent: October 3, 2023Assignee: LG ENERGY SOLUTION, LTD.Inventors: Hyeok Moo Lee, Sol Nip Lee, Song Taek Oh
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Patent number: 11635473Abstract: Provided is a secondary battery for testing an internal short, and a method and apparatus for testing an internal short of a secondary battery using the same. The secondary battery for testing an internal short according to the present disclosure includes a positive electrode side metal terminal having one end disposed between a positive electrode plate and a separator of the secondary battery, and a negative electrode side metal terminal having one end disposed between a negative electrode plate and the separator of the secondary battery, and is used to cause an internal short by contact between the other end of the positive electrode side metal terminal and the other end of the negative electrode side metal terminal.Type: GrantFiled: June 26, 2019Date of Patent: April 25, 2023Assignee: LG ENERGY SOLUTION, LTD.Inventors: Sol-Nip Lee, Ju-Hyun Kang
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Publication number: 20220367990Abstract: The present invention relates to a battery cell for evaluating an internal short circuit, and a method for evaluating using the battery cell, wherein an internal short circuit state of a battery cell can be easily induced and, at the same time, an effective internal short circuit evaluation is possible, and the battery cell comprising: first and second electrodes which comprise a coated region on which an electrode mixture layer is coated on a metal current collector and a non-coated region on which an electrode mixture layer is not coated, and which comprise first and second electrode tabs which protrude in one direction from the coated region and do not have an electrode mixture layer coated thereon.Type: ApplicationFiled: December 10, 2020Publication date: November 17, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Sol Nip LEE, Jeong Min YANG
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Patent number: 11495787Abstract: A method of preparing an electrode for a secondary battery, including: (i) a process of preparing a current collector in which through-pores or holes are formed and an electrode slurry containing an electrode active material; (ii) a process of bringing a shielding film into close contact with one surface of the current collector to shield pores or holes on the one surface of the current collector; (iii) a process of coating the electrode slurry on the other surface of the current collector to which the shielding film is not attached, and primarily drying to prepare an interim electrode; (iv) a process of removing the shielding film from the interim electrode; and (v) a process of secondarily drying the interim electrode to prepare the electrode.Type: GrantFiled: August 28, 2017Date of Patent: November 8, 2022Inventors: Hyung Man Cho, Sol Nip Lee, Song Taek Oh, Hyeok Moo Lee
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Patent number: 11495780Abstract: The present invention relates to a method of preparing an electrode for a lithium secondary battery and an electrode for a lithium secondary battery prepared thereby, wherein, since the method may suppress the migration of a binder and may uniformly control the distribution of the binder in the electrode by forming a plurality of negative electrode active material layers and allowing a drying condition of each of the negative electrode active material layers to be different, the method may improve life characteristics by improving adhesion between a negative electrode active material and a current collector and may improve charging characteristics by reducing interfacial resistance of the negative electrode.Type: GrantFiled: July 7, 2017Date of Patent: November 8, 2022Inventors: Sol Nip Lee, Young Geun Choi, Song Taek Oh
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Patent number: 11411413Abstract: A battery pack charging system includes a battery pack comprising a plurality of battery cells; a charging device connected to both electrodes of the battery pack to supply a charging current to the battery pack; a switch connected between the battery pack and the charging device to allow or block a flow of the charging current; and a current blocking member mechanically connected to the switch and configured to turn off the switch by causing a bending deformation when a potential difference formed between both electrodes of the battery pack is equal to or greater than a reference value.Type: GrantFiled: October 23, 2019Date of Patent: August 9, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: Seo-Young Yoon, Sol-Nip Lee
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Patent number: 11296325Abstract: The present disclosure provides an electrode for a secondary battery including a current collector having an electrode tab protruding outward to at least one outer peripheral side thereof, an electrode mixture layer formed on the current collector, and an electrode protecting layer applied on the electrode mixture layer, wherein the electrode protecting layer includes a conductive material and a binder to supplement conductivity of the electrode mixture layer and prevent separation of the electrode mixture layer from the current collector.Type: GrantFiled: August 21, 2017Date of Patent: April 5, 2022Inventors: Jeong Gil Kim, Hyo Sik Kim, Jeong Ho Ha, Ji Eun Lee, Sol Nip Lee
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Patent number: 11264599Abstract: An electrode performance evaluation system and an electrode performance evaluation method is disclosed. The method includes acquiring impedance measurement data for different frequencies by applying an alternating current signal to an electrode assembly including an electrode which is immersed in an electrolyte solution, calculating impedance calculation data for different frequencies while changing the frequency of an impedance equation corresponding to a circuit model of the electrode assembly, calculating the resistance value of ion bulk resistance in the electrolyte solution using the ion conductivity of the electrolyte solution, the area of the electrode and the thickness and porosity of an active material layer of the electrode, and determining effective tortuosity as a factor of the electrode performance based on the impedance measurement data for different frequencies, the impedance calculation data for different frequencies and the resistance value of the ion bulk resistance.Type: GrantFiled: October 23, 2018Date of Patent: March 1, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: Hyo-Sik Kim, Hye-Bin Kim, Sol-Nip Lee
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Publication number: 20210152006Abstract: A battery pack charging system includes a battery pack comprising a plurality of battery cells; a charging device connected to both electrodes of the battery pack to supply a charging current to the battery pack; a switch connected between the battery pack and the charging device to allow or block a flow of the charging current; and a current blocking member mechanically connected to the switch and configured to turn off the switch by causing a bending deformation when a potential difference formed between both electrodes of the battery pack is equal to or greater than a reference value.Type: ApplicationFiled: October 23, 2019Publication date: May 20, 2021Applicant: LG CHEM, LTD.Inventors: Seo-Young YOON, Sol-Nip LEE
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Publication number: 20200341074Abstract: Provided is a secondary battery for testing an internal short, and a method and apparatus for testing an internal short of a secondary battery using the same. The secondary battery for testing an internal short according to the present disclosure includes a positive electrode side metal terminal having one end disposed between a positive electrode plate and a separator of the secondary battery, and a negative electrode side metal terminal having one end disposed between a negative electrode plate and the separator of the secondary battery, and is used to cause an internal short by contact between the other end of the positive electrode side metal terminal and the other end of the negative electrode side metal terminal.Type: ApplicationFiled: June 26, 2019Publication date: October 29, 2020Applicant: LG CHEM, LTD.Inventors: Sol-Nip LEE, Ju-Hyun KANG
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Patent number: 10818929Abstract: Disclosed herein is an electrode for a secondary battery including an electrode mixture layer including an electrode active material on one surface or both surfaces of a current collector, wherein the electrode mixture layer includes a plurality of fine holes recessed toward the current collector from a vertical cross-sectional surface, and each of the fine holes is a horn-shaped hole whose diameter is gradually decreased from the vertical cross-sectional surface toward the current collector in the electrode mixture layer.Type: GrantFiled: August 21, 2017Date of Patent: October 27, 2020Assignee: LG Chem, Ltd.Inventors: Sol Nip Lee, Hyeok Moo Lee, Song Taek Oh
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Publication number: 20200185697Abstract: An electrode performance evaluation system and an electrode performance evaluation method is disclosed. The method includes acquiring impedance measurement data for different frequencies by applying an alternating current signal to an electrode assembly including an electrode which is immersed in an electrolyte solution, calculating impedance calculation data for different frequencies while changing the frequency of an impedance equation corresponding to a circuit model of the electrode assembly, calculating the resistance value of ion bulk resistance in the electrolyte solution using the ion conductivity of the electrolyte solution, the area of the electrode and the thickness and porosity of an active material layer of the electrode, and determining effective tortuosity as a factor of the electrode performance based on the impedance measurement data for different frequencies, the impedance calculation data for different frequencies and the resistance value of the ion bulk resistance.Type: ApplicationFiled: October 23, 2018Publication date: June 11, 2020Applicant: LG CHEM, LTD.Inventors: Hyo-Sik KIM, Hye-Bin KIM, Sol-Nip LEE
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Patent number: 10670665Abstract: The present disclosure is intended to design a secondary battery with improved boosting charge performance by estimating reaction in the thickness-wise direction of the electrode, and provides a method or estimating reaction of a secondary battery including (a) preparing a battery cell having a structure of first electrode/separator/reference electrode/separator/second electrode, wherein the second electrode has a structure of upper layer/porous film/lower layer, (b) setting a charging condition to estimate reaction of the battery cell, (c) measuring voltage and current of each of the upper layer, the lower layer and the battery cell while the set charging condition is reached, (d) after the charging condition, measuring an open-circuit voltage of the upper layer, the lower layer and the battery cell, and (e) comparatively analyzing a capacity obtained using the measured current with the measured open-circuit voltage, and a battery cell used for the same.Type: GrantFiled: November 6, 2017Date of Patent: June 2, 2020Assignee: LG CHEM, LTD.Inventors: Hyung-Man Cho, Sol-Nip Lee, Song-Taek Oh, Hyeok-Moo Lee
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Patent number: 10605870Abstract: Provided are a method of predicting a battery charge limit not to cause lithium (Li)-plating, and a battery charging method and apparatus capable of quickly charging a battery based on the battery charge limit. A battery charge limit prediction method according to the present disclosure includes (a) fabricating a three-electrode cell including a unit cell and a reference electrode, (b) measuring a negative electrode potential (CCV) based on a state of charge (SOC) while charging the three-electrode cell, and (c) determining a point at which the negative electrode potential is not dropped but starts to be constant, as a lithium (Li)-plating occurrence point, and setting the Li-plating occurrence point as a charge limit.Type: GrantFiled: August 4, 2016Date of Patent: March 31, 2020Assignee: LG CHEM, LTD.Inventors: Hyo-Mi Kim, Hyeok-Moo Lee, Song-Taek Oh, Sol-Nip Lee
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Publication number: 20190229341Abstract: Disclosed herein is an electrode for a secondary battery including an electrode mixture layer including an electrode active material on one surface or both surfaces of a current collector, wherein the electrode mixture layer includes a plurality of fine holes recessed toward the current collector from a vertical cross-sectional surface, and each of the fine holes is a horn-shaped hole whose diameter is gradually decreased from the vertical cross-sectional surface toward the current collector in the electrode mixture layer.Type: ApplicationFiled: August 21, 2017Publication date: July 25, 2019Applicant: LG CHEM, LTD.Inventors: Sol Nip LEE, Hyeok Moo LEE, Song Taek OH
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Publication number: 20190094309Abstract: The present disclosure is intended to design a secondary battery with improved boosting charge performance by estimating reaction in the thickness-wise direction of the electrode, and provides a method or estimating reaction of a secondary battery including (a) preparing a battery cell having a structure of first electrode/separator/reference electrode/separator/second electrode, wherein the second electrode has a structure of upper layer/porous film/lower layer, (b) setting a charging condition to estimate reaction of the battery cell, (c) measuring voltage and current of each of the upper layer, the lower layer and the battery cell while the set charging condition is reached, (d) after the charging condition, measuring an open-circuit voltage of the upper layer, the lower layer and the battery cell, and (e) comparatively analyzing a capacity obtained using the measured current with the measured open-circuit voltage, and a battery cell used for the same.Type: ApplicationFiled: November 6, 2017Publication date: March 28, 2019Applicant: LG CHEM, LTD.Inventors: Hyung-Man CHO, Sol-Nip LEE, Song-Taek OH, Hyeok-Moo LEE
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Publication number: 20190020036Abstract: The present disclosure provides an electrode for a secondary battery including a current collector having an electrode tab protruding outward to at least one outer peripheral side thereof, an electrode mixture layer formed on the current collector, and an electrode protecting layer applied on the electrode mixture layer, wherein the electrode protecting layer includes a conductive material and a binder to supplement conductivity of the electrode mixture layer and prevent separation of the electrode mixture layer from the current collector.Type: ApplicationFiled: August 21, 2017Publication date: January 17, 2019Applicant: LG Chem, Ltd.Inventors: Jeong Gil Kim, Hyo Sik Kim, Jeong Ho Ha, Ji Eun Lee, Sol Nip Lee
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Publication number: 20180331351Abstract: A method of preparing an electrode for a secondary battery, including: (i) a process of preparing a current collector in which through-pores or holes are formed and an electrode slurry containing an electrode active material; (ii) a process of bringing a shielding film into close contact with one surface of the current collector to shield pores or holes on the one surface of the current collector; (iii) a process of coating the electrode slurry on the other surface of the current collector to which the shielding film is not attached, and primarily drying to prepare an interim electrode; (iv) a process of removing the shielding film from the interim electrode; and (v) a process of secondarily drying the interim electrode to prepare the electrode.Type: ApplicationFiled: August 28, 2017Publication date: November 15, 2018Applicant: LG Chem, Ltd.Inventors: Hyung Man Cho, Sol Nip Lee, Song Taek Oh, Hyeok Moo Lee
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Patent number: 10126367Abstract: Provided is a non-destructive method for detecting lithium plating by which lithium plating can be detected in real time in an actual use environment of a secondary battery, a secondary battery charging method and apparatus for charging a secondary battery under the condition in which lithium plating does not occur by using this method, and a secondary battery system for detecting the state of a secondary battery by using this method. The method for detecting lithium plating according to the present disclosure is a method which detects lithium plating in a negative electrode in real time by observing a change in battery voltage as a function of SOC during charging a secondary battery, and determines a point at which a rise speed of the battery voltage slows down as a lithium plating occurrence point.Type: GrantFiled: June 20, 2016Date of Patent: November 13, 2018Assignee: LG CHEM, LTD.Inventors: Hyeok-Moo Lee, Hyo-Mi Kim, Song-Taek Oh, Sol-Nip Lee