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1.发明申请公开(公告)号：US20200223422A1
公开(公告)日：2020-07-16
申请号：US16245515
申请日：2019-01-11
Applicant: GM Global Technology Operations LLC
Inventor： Shaochun Ye , Daniel P. Grenn , Shifang Li , Russell K. Steele , Garrett M. Seeman
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. A method for controlling operation of a motor vehicle includes a vehicle controller: receiving a key-off command signal to power off the motor vehicle; determining if a difference between corresponding electrical characteristics of first and second traction battery packs is greater than a calibrated characteristic differential threshold; determining if a difference between corresponding battery pack capacities of the first and second traction battery packs is greater than a calibrated capacity differential threshold; and, responsive to the characteristic difference not being greater than the calibrated characteristic differential threshold and the capacity difference being greater than the calibrated capacity differential threshold, transmitting a key-on command signal to power on the motor vehicle, and a pack balancing command signal to reduce the capacity difference to below the calibrated capacity differential threshold.
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2.发明授权公开(公告)号：US11592493B2
公开(公告)日：2023-02-28
申请号：US16743848
申请日：2020-01-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： 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
IPC: G01R31/30 , G01R31/3832 , G01R31/3842 , H01M10/48 , H01M10/42 , G01R31/388
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.
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公开(公告)号：US20210257843A1
公开(公告)日：2021-08-19
申请号：US16792584
申请日：2020-02-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Andres V. Mituta , Shifang Li , Emil Francu , Garrett M. Seeman
Abstract: A battery system and a method include an auxiliary power module configured to support auxiliary loads. A first contactor switch connected between first and second battery packs, and a second contactor switch is in series with the first contactor switch. A controller determines whether to open or close first and second contactor switches depending on whether the battery packs are being charged in a high voltage mode or a low voltage mode. The contactor switches are both closed when in the high voltage mode and at least one of the contactor switches is opened when in the low voltage mode. At least one of the first and second battery packs operate to power the auxiliary power module while charging at least one of the first and second battery packs regardless of whether the battery packs are in the high voltage mode or the low voltage mode.
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公开(公告)号：US10988049B2
公开(公告)日：2021-04-27
申请号：US16414294
申请日：2019-05-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun Wang , Garrett M. Seeman , Jeffrey S. Piasecki
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.
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5.发明申请公开(公告)号：US20200376968A1
公开(公告)日：2020-12-03
申请号：US16429814
申请日：2019-06-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun Wang , Garrett M. Seeman , Jeffrey S. Piasecki
IPC: B60L50/60 , B60L50/51 , B60L53/60 , G01R31/3835
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.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11485239B2
公开(公告)日：2022-11-01
申请号：US16429814
申请日：2019-06-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun Wang , Garrett M. Seeman , Jeffrey S. Piasecki
IPC: B60L50/60 , B60L50/51 , G01R31/3835 , B60L53/60 , B60L58/12 , G01R31/367
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.
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公开(公告)号：US11349314B2
公开(公告)日：2022-05-31
申请号：US16675747
申请日：2019-11-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun Wang , Garrett M. Seeman , Jeffrey S. Piasecki
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.
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公开(公告)号：US11211803B2
公开(公告)日：2021-12-28
申请号：US16589586
申请日：2019-10-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Justin Bunnell , Garrett M. Seeman , Joseph Cho
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.
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公开(公告)号：US20210129706A1
公开(公告)日：2021-05-06
申请号：US16675725
申请日：2019-11-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun Wang , Lei Hao , Brian J. Koch , Jeffrey S. Piasecki , Garrett M. Seeman
IPC: B60L58/22 , H02J7/00 , B60L50/64 , B60L58/12 , B60R16/023
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.
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公开(公告)号：US20220140617A1
公开(公告)日：2022-05-05
申请号：US17085394
申请日：2020-10-30
Applicant: GM Global Technology Operations LLC
Inventor： Yue-Yun Wang , Chaitanya Sankavaram , Garrett M. Seeman , Azeem Sarwar
IPC: H02J7/00 , G01R31/392 , G01R31/3835
Abstract: A method is disclosed for determining the state of health of an electric battery that includes a plurality of battery cells. The method includes the steps of measuring the cell voltage of each individual cell of the plurality of battery cells, and analyzing each measured battery cell voltage to determine the state of health of the corresponding battery cell.
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