Patents by Inventor Jongwoon Yang

Jongwoon Yang 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).

  • Patent number: 10958086
    Abstract: Battery systems are provided according to various embodiments. A battery system includes: a first battery rack including a first battery module having a first battery, a first rack management unit which controls charging and discharging of the first battery module, and a first rack protection circuit which interrupts current of the first battery module under control of the first rack management unit; and a second battery rack including a second battery module having a second battery, a second rack management unit which controls charging and discharging of the second battery module, and a second rack protection circuit which interrupts current of the second battery module under control of the second rack management unit, wherein the first and second rack protection circuits are controlled in parallel by the first and second rack management units.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: March 23, 2021
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Jongwoon Yang
  • Publication number: 20190237980
    Abstract: Battery systems are provided according to various embodiments. A battery system includes: a first battery rack including a first battery module having a first battery, a first rack management unit which controls charging and discharging of the first battery module, and a first rack protection circuit which interrupts current of the first battery module under control of the first rack management unit; and a second battery rack including a second battery module having a second battery, a second rack management unit which controls charging and discharging of the second battery module, and a second rack protection circuit which interrupts current of the second battery module under control of the second rack management unit, wherein the first and second rack protection circuits are controlled in parallel by the first and second rack management units.
    Type: Application
    Filed: June 5, 2017
    Publication date: August 1, 2019
    Inventor: Jongwoon YANG
  • Publication number: 20160241052
    Abstract: A battery pack includes: at least one battery cell; a first switch; a resistor circuit including a first resistor, and a second resistor connected to the first resistor in parallel and having a larger resistance value than that of the first resistor; a second switch connected to the first switch in parallel and to be turned on to be electrically connected to at least one of the first resistor and the second resistor; and a controller to control charge or discharge of the battery cell by controlling one of the first switch and the second switch to be turned on or off according to a voltage value of the battery cell.
    Type: Application
    Filed: January 15, 2016
    Publication date: August 18, 2016
    Inventor: Jongwoon Yang
  • Publication number: 20160241057
    Abstract: There are provided an energy storage system including an energy storage device and a plurality of battery trays connected in parallel, and a method of controlling the same. The method for controlling an energy storage system of a battery tray in an under voltage protection (UVP) status includes performing precharging when a charge voltage is detected, transmitting information indicating that precharging is performed to at least one different tray connected to the battery tray in parallel, and when all of battery trays have performed precharging, simultaneously transmitting information instructing to start charging to the at least one different battery tray.
    Type: Application
    Filed: January 8, 2016
    Publication date: August 18, 2016
    Inventor: Jongwoon YANG
  • Patent number: 9214702
    Abstract: A battery for an electric tool includes at least one battery cell, a peripheral device operable to detect a battery condition of the at least one battery cell, and a microcomputer communicating with the peripheral device. The microcomputer periodically operates the peripheral device for detecting the battery condition during the time when the battery is not electrically connected to the electric tool.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: December 15, 2015
    Assignee: MAKITA CORPORATION
    Inventors: Masafumi Noda, Jongwoon Yang
  • Patent number: 9088052
    Abstract: A battery multi-series system and a communication method thereof. The battery multi-series system includes a master battery management system managing a battery; and a block master battery management system connected to the master battery management system and receiving data from at least one slave battery management system and storing the received data, wherein the master battery management system receives data periodically from the block master battery management system.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: July 21, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sesub Sim, Jongwoon Yang, Susumu Segawa, Tetsuya Okada, Euijeong Hwang, Hanseok Yun, Beomgyu Kim, Jinwan Kim
  • Patent number: 9024583
    Abstract: An analog switch and a battery pack using the same are provided. The analog switch can compensate for temperature dependence of voltages measured from a battery cell before applying the measured voltages to an analog-to-digital (A/D) converter. In an embodiment of the analog switch, a first diode is coupled in a backward direction from a flying capacitor, which is coupled to the A/D converter, to correspond to a second diode packaged therewith as a single set. The first diode is positioned in a battery cell voltage input path to store battery cell voltage values in the flying capacitor, while the second diode suppresses a temperature-related difference caused by the first diode to voltages measured from the battery cell.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: May 5, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Susumu Segawa, Euijeong Hwang, Beomgyu Kim, Jinwan Kim, Hanseok Yun
  • Patent number: 8949056
    Abstract: A battery management system and a battery pack. The battery management system includes a micro computer unit including an analog-to-digital converter (ADC) to measure a battery voltage, a voltage generation unit to generate a power voltage of the ADC by using the battery voltage, a voltage measuring unit to measure the power voltage, and an error calibration unit to measure a variation of the power voltage, measured by the voltage measuring unit, by using a reference power voltage, and calibrate the battery voltage, measured by the ADC, by using the measured variation.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Susumu Segawa
  • Patent number: 8872477
    Abstract: A battery pack and a method of operating the battery pack are disclosed. The battery pack includes a plurality of battery cells and is configured to open a terminal of the battery if an open circuit is detected in a line connecting battery cells.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: October 28, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Euijeong Hwang, Susumu Segawa, Jinwan Kim, Hanseok Yun, Beomgyu Kim
  • Patent number: 8860374
    Abstract: A control circuit for a secondary battery is disclosed. The control circuit comprising a measuring unit electrically connected with a single connection to a current carrying line for charging and discharging the battery, wherein the measuring unit is configured to generate a voltage value corresponding to current in the current carrying line.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: October 14, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hanseok Yun, Susumu Segawa, Testuya Okada, Euijeong Hwang, Sesub Sim, Jongwoon Yang, Beomgyu Kim, Jinwan Kim
  • Patent number: 8803478
    Abstract: A battery pack is provided. The battery pack includes first battery cells, a second battery cell coupled to one of the first battery cells, a voltage sensing and balancing circuit for measuring voltages of the first battery cells and for maintaining voltage balance between the first battery cells, a controller that includes an analog-to-digital (A/D) converter, and an analog switch for measuring a voltage value of the second battery cell and for transferring the measured voltage value to the A/D converter. The controller is for controlling charging and discharging of the first and second battery cells. The analog switch includes a flying capacitor, a first switch unit for transferring a voltage between the second battery cell and the flying capacitor, a second switch unit for transferring a voltage of the flying capacitor to the A/D converter, and a first diode for protecting a voltage source from a surge current.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 12, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Susumu Segawa
  • Patent number: 8802257
    Abstract: A battery pack and a driving method thereof. The battery pack includes a battery cell; a charge switch and a discharge switch installed in a charge/discharge line of a battery cell; and a microcontroller to sense and store voltages of the battery cell, to compare the voltages of the battery cell before and after the microcontroller is reset, and to controls the charge switch and the discharge switch based on the sensed voltages of the battery cell such that the microcontroller turns off only one of the charge switch and the discharge switch when there is a change between the voltages of the battery cell before and after the microcontroller is reset.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: August 12, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jinwan Kim, Jongwoon Yang, Susumu Segawa, Tetsuya Okada, Euijeong Hwang, Sesub Sim, Hanseok Yun, Beomgyu Kim
  • Patent number: 8659265
    Abstract: A battery pack and a method of sensing a voltage of the battery pack are disclosed. The battery pack has more battery cells than an individual cell voltage sensing unit can sense the voltages of. The additional battery cells are sensed using a multi-cell voltage sensing unit and digital processing.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: February 25, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jinwan Kim, Jongwoon Yang, Segawa Susumu, Testuya Okada, Euijeong Hwang, Sesub Sim, Hanseok Yun, Beomgyu Kim
  • Patent number: 8618773
    Abstract: A charging control method for a battery pack including a plurality of battery cells in which a full charge voltage value is initially set as a first voltage value. The charging control method includes: charging the plurality of battery cells to the first voltage value in an initial charge mode; and resetting the full charge voltage value to a second voltage value less than the first voltage value in a subsequent charge mode.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: December 31, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Susumu Segawa, Tetsuya Okada, Inkyu Park
  • Patent number: 8436575
    Abstract: A battery identification (ID) setting system effectively managing a plurality of batteries and a method of driving the same. The battery ID setting system having an external terminal includes a master battery management system (BMS) outputting ID setting signals, and a plurality of slave BMSs transmitting battery information signals containing absolute battery IDs and battery potential differences of batteries to the master BMS in response to the ID setting signals. The master BMS receives the battery information signals to assign and store the relative battery IDs corresponding to the absolute battery IDs of the batteries.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: May 7, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sesub Sim, Segawa Susumu, Jongwoon Yang, Jinwan Kim
  • Patent number: 8350528
    Abstract: A balancing method for a battery pack includes balancing battery cells near an end of discharge. A deep discharge of the battery cells can be prevented without using an overdischarge control unit. One battery cell balancing method includes: a balancing check condition determination step for determining whether or not a maximum voltage out of voltages of the battery cells is smaller than a reference voltage; a balancing start condition determination step for determining whether or not a residual capacity difference or voltage difference between the individual battery cells exceeds a reference value; a balancing time calculation step for calculating a balancing time for discharging the battery cell that exceeds the reference value; and a balancing operation step for discharging the selected battery cell when the battery cells are under charge or are at rest or when a discharge current of the battery cells is smaller than a reference current.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: January 8, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Segawa Susumu, Inkyu Park, Yonguk Kim
  • Publication number: 20120229142
    Abstract: An apparatus for detecting leakage current of a battery is disclosed. The apparatus includes a leakage current generating unit, a leakage current measuring unit, and a peak holding unit.
    Type: Application
    Filed: September 23, 2011
    Publication date: September 13, 2012
    Applicant: Samsung SDI Co., Ltd
    Inventors: Jongwoon Yang, Tetsuya Okada
  • Patent number: 8264206
    Abstract: A lithium ion battery and a method of power conservation for the same are provided. A bare cell including an electrode assembly with a plurality of electrodes and a protective circuit are coupled together via the plurality of electrodes. The protective circuit includes a remaining charge control circuit that internally detects a long-term nonuse state of the lithium ion battery and blocks current between the bare cell and the protective circuit when the long-term nonuse state is detected. The method includes: detecting whether the battery is used as a power source for an external instrument; determining and recording a value of an accumulated nonuse time when the lithium ion battery was not used as a power source; and blocking an internal current and converting the battery to a long-term nonuse mode when the value of the accumulated nonuse time is above a value indicative of a predetermined time.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: September 11, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sesub Sim, Jongwoon Yang, Segawa Susumu
  • Patent number: 8217628
    Abstract: A battery pack includes a battery including a positive electrode and a negative electrode, a switching module including a charge switching device and a discharge switching device, the charge switching device and discharge switching device being electrically connected to a high current path of the battery, a battery management unit (BMU) electrically connected to the switching module, the BMU being configured to adjust a limit value for a charging current supplied by the charge switching device and to set a magnitude of the charging current supplied by the charge switching device to be equal to or less than the adjusted.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: July 10, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Susumu Segawa, Sesub Sim
  • Publication number: 20120166847
    Abstract: A battery for an electric tool includes at least one battery cell, a peripheral device operable to detect a battery condition of the at least one battery cell, and a microcomputer communicating with the peripheral device. The microcomputer periodically operates the peripheral device for detecting the battery condition during the time when the battery is not electrically connected to the electric tool.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 28, 2012
    Applicant: MAKITA CORPORATION
    Inventors: Masafumi NODA, Jongwoon YANG