Patents by Inventor Hyeon-Jin Song
Hyeon-Jin Song 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: 11258291Abstract: Provided is a power supply circuit for energy transfer between a battery and a smoothing capacitor, a battery management system and a battery pack. The power supply circuit includes a transformer including a first winding and a second winding, a first switching circuit including a first switch connected in series to the first winding, and connected in parallel to the battery together with the first winding, a second switching circuit including a second switch connected in series to the second winding, and connected in parallel to the smoothing capacitor together with the second winding, and a switch controller. To pre-charge the smoothing capacitor, the switch controller is configured to perform a first operation of turning on the first switch and turning off the second switch, and subsequently perform a second operation of turning off the first switch and turning on the second switch.Type: GrantFiled: January 28, 2019Date of Patent: February 22, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: Hyeon-Jin Song, Seon-Uk Yu
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Publication number: 20220001755Abstract: A battery charging system including a first battery pack having a first battery that is charged in a non-contact connection; a second battery pack having a second battery that is charged in a non-contact connection, a first capacitor connected in series between positive and negative poles of the second battery, and a first BMS configured to measure a voltage of the second battery and voltages of both ends the first capacitor; and the first BMS charges the second battery with the voltage of the first battery when the first battery voltage is higher than the second battery voltage, and charges the first battery with the voltage of the second battery when the first battery voltage is lower than the second battery voltage.Type: ApplicationFiled: December 17, 2019Publication date: January 6, 2022Applicant: LG CHEM, LTD.Inventor: Hyeon Jin SONG
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Patent number: 11165262Abstract: An apparatus and method for protecting each of a plurality of cell stacks included in a battery pack from overcharge. The overcharge prevention apparatus prevents the overcharge of a plurality of cell stacks connected in series within a high current path. The overcharge prevention apparatus includes a voltage measuring unit configured to measure voltage of each cell stack, and generate a first monitoring signal indicating the measured voltage, a current regulating unit configured to selectively provide a bypass path to each cell stack, and a controller connected to the voltage measuring unit and the current regulating unit allowing communication. The controller is configured to control the current regulating unit based on the first monitoring signal from the voltage measuring unit.Type: GrantFiled: February 12, 2018Date of Patent: November 2, 2021Inventors: Jae-Chan Lee, Soo-Ryoung Kim, Hyun-Sik Kim, Hyeon-Jin Song, Won-Tae Lee, Yang-Lim Choi
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Patent number: 11163007Abstract: A current detection circuit to detect an electric current of the battery pack includes an insulating substrate, a first busbar and a second busbar disposed on a first surface of the insulating substrate, a shunt resistor disposed between the first busbar and the second busbar on the first surface, and electrically connected to the first busbar and the second busbar, and a hall effect sensor disposed on a second surface of the insulating substrate, wherein the second surface is opposite the first surface.Type: GrantFiled: August 5, 2019Date of Patent: November 2, 2021Inventor: Hyeon-Jin Song
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Patent number: 11056894Abstract: Disclosed is a battery management apparatus, which includes: a precharging unit having a plurality of switches, the precharging unit being connected to the first main relay in parallel and connected between the second main relay and the second charge/discharge terminal; a control unit configured to control the plurality of switches which causes an output voltage of the battery module to be converted into an AC voltage and applied to the first main relay or the second main relay; and a diagnosing unit configured to diagnose a failure of the first main relay based on a first both-end voltage value of the first main relay to which the AC voltage is applied or to diagnose a failure of the second main relay based on a second both-end voltage value of the second main relay to which the AC voltage is applied.Type: GrantFiled: August 23, 2019Date of Patent: July 6, 2021Inventors: Hyeon-Jin Song, Seon-Uk Yu, Yang-Lim Choi
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Patent number: 10958262Abstract: The present invention relates to a system and a method for protecting a circuit between batteries, in which counter-electromotive force generated from the lead-storage battery is prevented from being applied to a MOSFET switch when power is cut off through the MOSFET switch in a circuit in which a vehicle lead-storage battery and a lithium polymer battery are connected to each other to prevent the MOSFET switch from overcurrent and prevent current, which leaks from the lead-storage battery when the lead-storage battery is charged, from being conducted to a path other than a determined path in advance.Type: GrantFiled: July 14, 2017Date of Patent: March 23, 2021Inventors: Hyeon Jin Song, Wontae Lee, Yanglim Choi
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Publication number: 20210041502Abstract: A switch diagnosing apparatus and method capable of effectively diagnosing a charging switch and a discharging switch provided to a battery pack. It is possible to effectively diagnose the state of a switch as at least one of a normal state, an open stuck state, a closed stuck state and a drift state, thereby improving the diagnosing efficiency.Type: ApplicationFiled: July 10, 2019Publication date: February 11, 2021Applicant: LG Chem, Ltd.Inventor: Hyeon-Jin Song
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Patent number: 10862296Abstract: The present invention relates to an apparatus and a method for protecting a MOSFET relay by using a voltage detector and a signal fuse, which calculate a detection voltage value through a voltage detector from an electrically conducted current value of a MOSFET relay provided in a battery main circuit for a vehicle and pre-block current applied to the MOSFET relay by operating a signal fuse when the calculated voltage value is more than a predetermined threshold to protect the MOSFET relay from being burned.Type: GrantFiled: April 10, 2017Date of Patent: December 8, 2020Assignee: LG CHEM, LTD.Inventors: Hyeon Jin Song, Chang Bog Lee, Yanglim Choi
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Publication number: 20200300919Abstract: A current detection circuit to detect an electric current of the battery pack includes an insulating substrate, a first busbar and a second busbar disposed on a first surface of the insulating substrate, a shunt resistor disposed between the first busbar and the second busbar on the first surface, and electrically connected to the first busbar and the second busbar, and a hall effect sensor disposed on a second surface of the insulating substrate, wherein the second surface is opposite the first surface.Type: ApplicationFiled: August 5, 2019Publication date: September 24, 2020Applicant: LG Chem, Ltd.Inventor: Hyeon-Jin Song
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Publication number: 20200185954Abstract: Provided is a power supply circuit for energy transfer between a battery and a smoothing capacitor, a battery management system and a battery pack. The power supply circuit includes a transformer including a first winding and a second winding, a first switching circuit including a first switch connected in series to the first winding, and connected in parallel to the battery together with the first winding, a second switching circuit including a second switch connected in series to the second winding, and connected in parallel to the smoothing capacitor together with the second winding, and a switch controller. To pre-charge the smoothing capacitor, the switch controller is configured to perform a first operation of turning on the first switch and turning off the second switch, and subsequently perform a second operation of turning off the first switch and turning on the second switch.Type: ApplicationFiled: January 28, 2019Publication date: June 11, 2020Applicant: LG CHEM, LTD.Inventors: Hyeon-Jin SONG, Seon-Uk YU
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Publication number: 20200044459Abstract: An apparatus and method for protecting each of a plurality of cell stacks included in a battery pack from overcharge. The overcharge prevention apparatus prevents the overcharge of a plurality of cell stacks connected in series within a high current path. The overcharge prevention apparatus includes a voltage measuring unit configured to measure voltage of each cell stack, and generate a first monitoring signal indicating the measured voltage, a current regulating unit configured to selectively provide a bypass path to each cell stack, and a controller connected to the voltage measuring unit and the current regulating unit allowing communication. The controller is configured to control the current regulating unit based on the first monitoring signal from the voltage measuring unit.Type: ApplicationFiled: February 12, 2018Publication date: February 6, 2020Applicant: LG Chem, Ltd.Inventors: Jae-Chan Lee, Soo-Ryoung Kim, Hyun-Sik Kim, Hyeon-Jin Song, Won-Tae Lee, Yang-Lim Choi
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Patent number: 10530166Abstract: Disclosed is a battery management apparatus, which includes: a pre-charging unit having a plurality of switches and connected to the first main relay in parallel, the pre-charging unit being connected between the second main relay and the second charging/discharging terminal; a control unit configured to control the plurality of switches so that an output voltage of the battery module is reduced to a reduced voltage and output between the first charging/discharging terminal and the second charging/discharging terminal; and a diagnosing unit configured to diagnose a connection state in the load based on a load current value of the current flowing in the load to which the reduced voltage is applied.Type: GrantFiled: September 11, 2018Date of Patent: January 7, 2020Assignee: LG Chem, Ltd.Inventors: Hyeon-Jin Song, Seon-Uk Yu, Yang-Lim Choi
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Publication number: 20190379217Abstract: Disclosed is a battery management apparatus, which includes: a precharging unit having a plurality of switches, the precharging unit being connected to the first main relay in parallel and connected between the second main relay and the second charge/discharge terminal; a control unit configured to control the plurality of switches which causes an output voltage of the battery module to be converted into an AC voltage and applied to the first main relay or the second main relay; and a diagnosing unit configured to diagnose a failure of the first main relay based on a first both-end voltage value of the first main relay to which the AC voltage is applied or to diagnose a failure of the second main relay based on a second both-end voltage value of the second main relay to which the AC voltage is applied.Type: ApplicationFiled: August 23, 2019Publication date: December 12, 2019Applicant: LG Chem, Ltd.Inventors: Hyeon-Jin Song, Seon-Uk Yu, Yang-Lim Choi
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Patent number: 10446352Abstract: The present invention relates to a system and a method for independently controlling a relay using bimetal which allow bimetal to operate based on a signal output from a micro controller unit when current of a predetermined threshold or more flows on a circuit to allow current which flows between a battery and the relay to flow bypassing the bimetal to independently control the relay regardless of whether a circuit pattern is abnormal.Type: GrantFiled: August 30, 2016Date of Patent: October 15, 2019Assignee: LG CHEM, LTD.Inventors: Hyeon Jin Song, Yanglim Choi
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Patent number: 10365333Abstract: The present invention relates to a transformer relay and a battery voltage measurement system using the same and the transformer relay includes: a transformer transforming voltage of a voltage measurement signal according to a wiring ratio of a first wiring and a second wiring; and a relay transferring voltage of a battery while an operation state is changed to an On state when the transformed voltage of the voltage measurement signal is input and the battery voltage measurement system using the transformer relay, includes: the transformer; and a measurement unit measuring a battery voltage value by receiving the voltage of the battery from the relay.Type: GrantFiled: December 28, 2015Date of Patent: July 30, 2019Assignee: LG CHEM, LTD.Inventors: Hyeon Jin Song, Yanglim Choi
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Patent number: 10266056Abstract: The present invention relates to a system and a method of connecting a battery, which include a relay unit connected to a battery by a current, and allow a current with a different intensity to flow in the relay unit according to whether force applied to a circuit from the outside is detected and a size of the detected force, thereby maintaining or blocking the connection of the relay unit to the battery in consideration of the detection of the force and the degree of danger of the detected force.Type: GrantFiled: August 30, 2016Date of Patent: April 23, 2019Assignee: LG CHEM, LTD.Inventors: Hyeon Jin Song, Yanglim Choi
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Publication number: 20190097438Abstract: Disclosed is a battery management apparatus, which includes: a pre-charging unit having a plurality of switches and connected to the first main relay in parallel, the pre-charging unit being connected between the second main relay and the second charging/discharging terminal; a control unit configured to control the plurality of switches so that an output voltage of the battery module is reduced to a reduced voltage and output between the first charging/discharging terminal and the second charging/discharging terminal; and a diagnosing unit configured to diagnose a connection state in the load based on a load current value of the current flowing in the load to which the reduced voltage is applied.Type: ApplicationFiled: September 11, 2018Publication date: March 28, 2019Applicant: LG Chem, Ltd.Inventors: Hyeon-Jin Song, Seon-Uk Yu, Yang-Lim Choi
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Publication number: 20190052257Abstract: The present invention relates to an apparatus and a method for protecting a MOSFET relay by using a voltage detector and a signal fuse, which calculate a detection voltage value through a voltage detector from an electrically conducted current value of a MOSFET relay provided in a battery main circuit for a vehicle and pre-block current applied to the MOSFET relay by operating a signal fuse when the calculated voltage value is more than a predetermined threshold to protect the MOSFET relay from being burned.Type: ApplicationFiled: April 10, 2017Publication date: February 14, 2019Applicant: LG CHEM, LTD.Inventors: Hyeon Jin SONG, Chang Bog LEE, Yanglim CHOI
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Publication number: 20190020337Abstract: The present invention relates to a system and a method for protecting a circuit between batteries, in which counter-electromotive force generated from the lead-storage battery is prevented from being applied to a MOSFET switch when power is cut off through the MOSFET switch in a circuit in which a vehicle lead-storage battery and a lithium polymer battery are connected to each other to prevent the MOSFET switch from overcurrent and prevent current, which leaks from the lead-storage battery when the lead-storage battery is charged, from being conducted to a path other than a determined path in advance.Type: ApplicationFiled: July 14, 2017Publication date: January 17, 2019Applicant: LG Chem, Ltd.Inventors: Hyeon Jin Song, Wontae Lee, Yanglim Choi
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Publication number: 20180154795Abstract: The present invention relates to a system and a method of connecting a battery, which include a relay unit connected to a battery by a current, and allow a current with a different intensity to flow in the relay unit according to whether force applied to a circuit from the outside is detected and a size of the detected force, thereby maintaining or blocking the connection of the relay unit to the battery in consideration of the detection of the force and the degree of danger of the detected force.Type: ApplicationFiled: August 30, 2016Publication date: June 7, 2018Applicant: LG CHEM, LTD.Inventors: Hyeon Jin SONG, Yanglim CHOI