Patents by Inventor Jae Sung Gu
Jae Sung Gu 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: 9738174Abstract: A lithium battery system includes a first battery pack including a plurality of first battery cells connected in series. The first battery pack is configured to be connected in parallel to an alternator and a second battery pack, and has a lower capacity than the second battery pack. A negative electrode of each of the first battery cells includes a negative electrode active material. The negative electrode active material includes a carbon-based material having an interlayer spacing of a (002) plane of 0.34 nm to 0.50 nm in X-ray diffraction measurement using copper (Cu) K? lines.Type: GrantFiled: March 18, 2014Date of Patent: August 22, 2017Assignee: Samsung SDI Co., Ltd.Inventors: Jae-Sung Gu, Eui-Hwan Song, Ji-Hong Lim, Seok-Gyun Woo, Woon-Sun Rheu
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Patent number: 9479000Abstract: There is provided a battery pack including a mixed cell and a power device including the same. The mixed cell may include a first cell and a second cell having different electrical characteristics. The electrical characteristics may include at least one of an open circuit voltage characteristic corresponding to a state of charge, an internal resistance, an operation voltage, or a capacity.Type: GrantFiled: August 27, 2013Date of Patent: October 25, 2016Assignee: Samsung SDI Co., Ltd.Inventors: Jae-Sung Gu, Eui-Hwan Song, Seok-Gyun Woo
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Patent number: 9170305Abstract: A battery management system (BMS) and a method of controlling the same are disclosed. In one embodiment, the BMS includes a reference setup unit configured to set a charge completion value used to calculate a state of health (SOH) of the battery, wherein the battery comprises one or more battery packs each including a plurality of battery cells, and a charge amount calculation unit configured to calculate an amount actually charged in the battery from a first point in time when charging of the battery begins to a second point in time when the battery charging actually reaches the charge completion value. The BMS may further include an SOH calculation unit configured to calculate the SOH of the battery based on a ratio of i) the actual charge amount to ii) a preset charge amount expected to be charged from the first time point to the second time point.Type: GrantFiled: February 14, 2012Date of Patent: October 27, 2015Assignees: Samsung SDI Co., Ltd., Robert Bosch GmbHInventor: Jae-Sung Gu
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Publication number: 20150229144Abstract: A battery management system includes a battery pack, a resistive path, and a redundant resistive path. The battery pack includes a first output terminal and a second output terminal connected to a load. The redundant resistive path is between a first output terminal of the battery pack and the first outer terminal. The resistive path is between the second output terminal of the battery pack and a second output terminal. The controller is to detect overcurrent flowing through the battery pack using the redundant resistive path and the resistive path.Type: ApplicationFiled: January 14, 2015Publication date: August 13, 2015Inventors: Jin-Soo JANG, Jae-Sung GU
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Publication number: 20140312687Abstract: A lithium battery system includes a first battery pack including a plurality of first battery cells connected in series. The first battery pack is configured to be connected in parallel to an alternator and a second battery pack, and has a lower capacity than the second battery pack. A negative electrode of each of the first battery cells includes a negative electrode active material. The negative electrode active material includes a carbon-based material having an interlayer spacing of a (002) plane of 0.34 nm to 0.50 nm in X-ray diffraction measurement using copper (Cu) K? lines.Type: ApplicationFiled: March 18, 2014Publication date: October 23, 2014Applicant: SAMSUNG SDI CO., LTD.Inventors: Jae-Sung Gu, Eui-Hwan Song, Ji-Hong Lim, Seok-Gyun Woo, Woon-Sun Rheu
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Publication number: 20140197794Abstract: There is provided a battery pack including a mixed cell and a power device including the same. The mixed cell may include a first cell and a second cell having different electrical characteristics. The electrical characteristics may include at least one of an open circuit voltage characteristic corresponding to a state of charge, an internal resistance, an operation voltage, or a capacity.Type: ApplicationFiled: August 27, 2013Publication date: July 17, 2014Applicant: SAMSUNG SDI CO., LTD.Inventors: Jae-Sung Gu, Eui-Hwan Song, Seok-Gyun Woo
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Publication number: 20120256599Abstract: A battery management system (BMS) and a method of controlling the same are disclosed. In one embodiment, the BMS includes a reference setup unit configured to set a charge completion value used to calculate a state of health (SOH) of the battery, wherein the battery comprises one or more battery packs each including a plurality of battery cells, and a charge amount calculation unit configured to calculate an amount actually charged in the battery from a first point in time when charging of the battery begins to a second point in time when the battery charging actually reaches the charge completion value. The BMS may further include an SOH calculation unit configured to calculate the SOH of the battery based on a ratio of i) the actual charge amount to ii) a preset charge amount expected to be charged from the first time point to the second time point.Type: ApplicationFiled: February 14, 2012Publication date: October 11, 2012Applicant: SB LiMotive Co., Ltd.Inventor: Jae-Sung GU
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Patent number: 7977918Abstract: A method of controlling a battery charge level of a hybrid electric vehicle includes: monitoring a quantity of current accumulated for a predetermined time based on a battery charge/discharge current value; calculating a regenerative charge derating constant; calculating a correction coefficient based on the quantity of current accumulated and a battery state of charge; multiplying the regenerative charge derating constant by the correction coefficient to calculate a final regenerative charge derating constant; and multiplying the final regenerative charge derating constant by a charge power to calculate a final charge power, and selectively restricting the battery charge level based on the final charge power.Type: GrantFiled: September 24, 2010Date of Patent: July 12, 2011Assignee: Hyundai Motor CompanyInventors: Yeong Jin Nam, Jae Sung Gu, Chae Mo Yang, Suk Hyung Kim
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Patent number: 7932699Abstract: A method of controlling a battery charge level of a hybrid electric vehicle includes: monitoring a quantity of current accumulated for a predetermined time based on a battery charge/discharge current value; calculating a regenerative charge derating constant; calculating a correction coefficient based on the quantity of current accumulated and a battery state of charge; multiplying the regenerative charge derating constant by the correction coefficient to calculate a final regenerative charge derating constant; and multiplying the final regenerative charge derating constant by a charge power to calculate a final charge power, and selectively restricting the battery charge level based on the final charge power.Type: GrantFiled: September 5, 2007Date of Patent: April 26, 2011Assignee: Hyundai Motor CompanyInventors: Yeong Jin Nam, Jae Sung Gu, Chae Mo Yang, Suk Hyung Kim
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Publication number: 20110037434Abstract: A method of controlling a battery charge level of a hybrid electric vehicle includes: monitoring a quantity of current accumulated for a predetermined time based on a battery charge/discharge current value; calculating a regenerative charge derating constant; calculating a correction coefficient based on the quantity of current accumulated and a battery state of charge; multiplying the regenerative charge derating constant by the correction coefficient to calculate a final regenerative charge derating constant; and multiplying the final regenerative charge derating constant by a charge power to calculate a final charge power, and selectively restricting the battery charge level based on the final charge power.Type: ApplicationFiled: September 24, 2010Publication date: February 17, 2011Applicant: Hyundai Motor CompanyInventors: Yeong Jin Nam, Jae Sung Gu, Chae Mo Yang, Suk Hyung Kim
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Publication number: 20090243554Abstract: The present invention provides a method of protecting a battery for a hybrid vehicle, in which a counter electromotive voltage of a motor is limited by limiting engine RPM if it is determined that there is a risk of battery overcharge in the event of a failure of a component related to motor control, such as a motor controller, a battery controller, etc., thus protecting the battery from the risk of overcharge and securing safety of the battery.Type: ApplicationFiled: August 15, 2008Publication date: October 1, 2009Applicants: Hyundai Motor Company, Kia Motors CorporationInventors: Jae Sung Gu, Suk Hyung Kim
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Publication number: 20080136375Abstract: A method of controlling a battery charge level of a hybrid electric vehicle includes: monitoring a quantity of current accumulated for a predetermined time based on a battery charge/discharge current value; calculating a regenerative charge derating constant; calculating a correction coefficient based on the quantity of current accumulated and a battery state of charge; multiplying the regenerative charge derating constant by the correction coefficient to calculate a final regenerative charge derating constant; and multiplying the final regenerative charge derating constant by a charge power to calculate a final charge power, and selectively restricting the battery charge level based on the final charge power.Type: ApplicationFiled: September 5, 2007Publication date: June 12, 2008Inventors: Yeong Jin Nam, Jae Sung Gu, Chae Mo Yang, Suk Hyung Kim
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Publication number: 20080086247Abstract: Disclosed herein is a battery management system for vehicles, comprising: a plurality of slave control units, each of which manages a state of charge of a corresponding battery cell; and a master control unit interfacing with the slave control units to manage a state of charge of all the battery cells.Type: ApplicationFiled: December 5, 2006Publication date: April 10, 2008Applicant: Hyundai Motor CompanyInventors: Jae-Sung Gu, Chin-Gon Kim, Suk-Hyung Kim, Sun-Soon Park