Patents by Inventor Garrett M. Seeman

Garrett M. Seeman 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).

  • Publication number: 20210215768
    Abstract: A method for battery capacity estimation is provided. The method includes monitoring a sensor, collecting a plurality of data points including a voltage-based state of charge value and an integrated current value, defining within the data points a first data set collected during a first time period and a second data set collected during a second time period, determining an integrated current error related to the second data set, comparing the integrated current error related to the second data set to a threshold integrated current error. When the error related to the second data set exceeds the threshold, the method further includes resetting the second data set based upon an integrated current value from the first time period. The method further includes combining the data sets to create a combined data set and determining a voltage slope capacity estimate as a change in integrated current versus voltage-based state of charge.
    Type: Application
    Filed: January 15, 2020
    Publication date: July 15, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Alfred Zhang, Justin Bunnell, Garrett M. Seeman, Jeffrey S. Piasecki, Charles W. Wampler, Brian J. Koch, Jing Gao, Jeffrey A. Bednar, Xiumei Guo, Justin R. McDade
  • Patent number: 11052783
    Abstract: System and method of controlling operation of a device having multiple rechargeable packs configured to store energy. The multiple rechargeable packs include at least one primary pack characterized by a first capacity and at least one auxiliary pack characterized by a second capacity, the first capacity being greater than the second capacity. A controller is configured to selectively command one or more of the multiple rechargeable packs to begin at least one of discharging and charging. When an estimated end of trip time is less than or equal to a discharging time of the at least one auxiliary pack, the discharging of the at least one auxiliary pack is begun. When the estimated end of trip time is greater than the discharging time, the discharging is delayed until the respective state of charge of the at least one primary pack reaches a first threshold.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: July 6, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: James C. Gibbs, Brandon R. Jones, Garrett M. Seeman
  • Patent number: 11034257
    Abstract: A method for estimating remaining energy in a battery pack having series-connected cells/cell groups includes measuring battery parameters, including a battery voltage, current, and temperature. The controller estimates a static state of charge difference (?SOC) value and a current-dependent ?SOC value in real-time using the parameters, including calculating the static ?SOC value as a difference between an average SOC of the battery pack and an SOC of a weakest/lowest energy cell group. The current-dependent ?SOC value is a percentage SOC per unit of the current. The static ?SOC value and current-dependent ?SOC values are filtered via a multi-parameter state estimator block. Using the filtered state values, the controller executes a control action responsive to the estimated remaining energy, including displaying the remaining energy and/or a quantity derived from the remaining energy via a display device. A powertrain system includes the controller, electric machine, and battery pack.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: June 15, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Garrett M. Seeman, Justin Bunnell, Ciro A. Spigno
  • Publication number: 20210135461
    Abstract: A distributed battery power system having a battery pack and a battery controller. The battery pack has: a plurality of cells configured to generate a plurality of cell voltages; a voltage current temperature module electrically connected to the plurality of cells; and a plurality of isolation switch sets electrically connected between the plurality of cells. The battery controller is in communication with the voltage current temperature module, and operable to: send a status request to the voltage current temperature module; receive the plurality of cell voltages from the voltage current temperature module in response to the status request; determine if the plurality of cells includes one or more problem cells in response to the plurality of cell voltages; and perform an action in response to determining that the one or more problem cells are present to prevent damage to the one or more problem cells.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 6, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Garrett M. Seeman, Jeffrey S. Piasecki
  • Publication number: 20210129706
    Abstract: Management system for a rechargeable energy storage device in an electric vehicle and corresponding method is disclosed. The rechargeable energy storage device has one or more battery packs each having a plurality of modules with one or more respective cells. A respective module management unit is embedded in each of the plurality of modules through respective microcircuits and configured to determine one or more local parameters. A supervisory controller is configured for two-way communication with the respective module management unit. The supervisory controller is configured to receive the local parameters, determine one or more global pack parameters based in part on the local parameters and transmit the global pack parameters back to the respective management unit. The supervisory controller is configured to control operation of the rechargeable energy storage device based in part on the global pack parameters and the local parameters.
    Type: Application
    Filed: November 6, 2019
    Publication date: May 6, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Lei Hao, Brian J. Koch, Jeffrey S. Piasecki, Garrett M. Seeman
  • Patent number: 10988049
    Abstract: Powerflow is managed using a method, e.g., in a powertrain system having a multi-pack rechargeable energy storage system (RESS) with parallel battery packs. Each pack has a corresponding maximum electrical (current or voltage) limit. The method includes predicting a corresponding terminal voltage for each pack using the corresponding maximum electrical limit. The method includes selecting a terminal voltage as a selected voltage based on a requested operating mode, including selecting a maximum of the terminal voltages when the requested operating mode is a discharging mode and a minimum of the same when the requested operating mode is a charging mode. A pack current through each pack is predicted using the selected voltage and a corresponding battery state space model. A total power capability of the RESS is predicted over a predetermined prediction horizon using the selected voltage, with the operating mode controlled over the prediction horizon via the controller.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: April 27, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Yue-Yun Wang, Garrett M. Seeman, Jeffrey S. Piasecki
  • Patent number: 10981557
    Abstract: Presented are traction battery pack balancing systems, methods for making/operating such systems, and multi-pack, electric-drive motor vehicles with battery pack balancing capabilities.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: April 20, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Shaochun Ye, Daniel P. Grenn, Shifang Li, Russell K. Steele, Garrett M. Seeman
  • Publication number: 20210098997
    Abstract: A system and associated method are described for balancing an electrical parameter associated with stored electric power in a multi-cell battery. A cell charge balancing system determines a first plurality of the electrical parameters associated with respective ones of the plurality of cells, a plurality of first charge parameters associated with the cells, and a first quality index. A second plurality of the electrical parameters are determined, and second charge parameters are determined to determine a second quality index. The first and second quality indices are compared, and a cell charge balancing routine controls the balancing system based upon the first quality index when the first quality index is greater than the second quality index. The cell charge balancing routine controls the cell charge balancing system based upon the second quality index when the first quality index is less than the second quality index.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 1, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Justin Bunnell, Garrett M. Seeman, Joseph Cho
  • Publication number: 20200384880
    Abstract: System and method of controlling operation of a device having multiple rechargeable packs configured to store energy. The multiple rechargeable packs include at least one primary pack characterized by a first capacity and at least one auxiliary pack characterized by a second capacity, the first capacity being greater than the second capacity. A controller is configured to selectively command one or more of the multiple rechargeable packs to begin at least one of discharging and charging. When an estimated end of trip time is less than or equal to a discharging time of the at least one auxiliary pack, the discharging of the at least one auxiliary pack is begun. When the estimated end of trip time is greater than the discharging time, the discharging is delayed until the respective state of charge of the at least one primary pack reaches a first threshold.
    Type: Application
    Filed: June 6, 2019
    Publication date: December 10, 2020
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: James C. Gibbs, Brandon R. Jones, Garrett M. Seeman
  • Publication number: 20200376968
    Abstract: Powerflow of a rechargeable energy storage system (RESS) is managed according to a method. The RESS has series-connected first and second battery elements with different characteristics. Each element, e.g., a pack, has a corresponding maximum or minimum voltage or current limit. Currents are predicted for each of the first and second battery elements via a controller using a corresponding voltage limit. A requested operating mode of the RESS is used to select a current for the elements. A voltage across the elements is predicted using the selected current and a corresponding battery state space model. The method predicts a total power capability of the RESS over a prediction horizon using the selected current to generate predicted power capability values. The requested operating mode is controlled over the horizon using the power capability values. A powertrain system includes the RESS, an inverter, an electric machine, and the controller.
    Type: Application
    Filed: June 3, 2019
    Publication date: December 3, 2020
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Garrett M. Seeman, Jeffrey S. Piasecki
  • Publication number: 20200361340
    Abstract: Powerflow is managed using a method, e.g., in a powertrain system having a multi-pack rechargeable energy storage system (RESS) with parallel battery packs. Each pack has a corresponding maximum electrical (current or voltage) limit. The method includes predicting a corresponding terminal voltage for each pack using the corresponding maximum electrical limit. The method includes selecting a terminal voltage as a selected voltage based on a requested operating mode, including selecting a maximum of the terminal voltages when the requested operating mode is a discharging mode and a minimum of the same when the requested operating mode is a charging mode. A pack current through each pack is predicted using the selected voltage and a corresponding battery state space model. A total power capability of the RESS is predicted over a predetermined prediction horizon using the selected voltage, with the operating mode controlled over the prediction horizon via the controller.
    Type: Application
    Filed: May 16, 2019
    Publication date: November 19, 2020
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Garrett M. Seeman, Jeffrey S. Piasecki
  • Publication number: 20200223422
    Abstract: Presented are traction battery pack balancing systems, methods for making/operating such systems, and multi-pack, electric-drive motor vehicles with battery pack balancing capabilities.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 16, 2020
    Applicant: GM Global Technology Operations LLC
    Inventors: Shaochun Ye, Daniel P. Grenn, Shifang Li, Russell K. Steele, Garrett M. Seeman
  • Publication number: 20200223322
    Abstract: A method for estimating remaining energy in a battery pack having series-connected cells/cell groups includes measuring battery parameters, including a battery voltage, current, and temperature. The controller estimates a static state of charge difference ( ?SOC) value and a current-dependent ?SOC value in real-time using the parameters, including calculating the static ?SOC value as a difference between an average SOC of the battery pack and an SOC of a weakest/lowest energy cell group. The current-dependent ?SOC value is a percentage SOC per unit of the current. The static ?SOC value and current-dependent ?SOC values are filtered via a multi-parameter state estimator block. Using the filtered state values, the controller executes a control action responsive to the estimated remaining energy, including displaying the remaining energy and/or a quantity derived from the remaining energy via a display device. A powertrain system includes the controller, electric machine, and battery pack.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 16, 2020
    Applicant: GM Global Technology Operations LLC
    Inventors: Garrett M. Seeman, Justin Bunnell, Ciro A. Spigno