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公开(公告)号：US20250108726A1
公开(公告)日：2025-04-03
申请号：US18480046
申请日：2023-10-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： William R. Cawthorne , Brian A. Welchko , Bradley David Smrdel , Mohamed Kamel , Carrie Bradley , Suresh Gopalakrishnan , Chandra S. Namuduri , David W. Walters
Abstract: In an embodiment, a method is provided for controlling a plurality of converters that are coupled to a plurality of cells of a rechargeable energy storage system (RESS) and configured to supply electric current to other systems that require the electric current, the method including obtaining, via one or more sensors, cell data as to the plurality of cells, the cell data including a state-of-charge for each of the plurality of cells; obtaining other system data as to the other systems, including an amount of electric current required by the other systems; and controlling the plurality of converters, in accordance with instructions provided by a processor, based on both: the cell data, including the state-of-charge for each of the plurality of cells; and the other system data, including the amount of electric current by the other systems.
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公开(公告)号：US12267032B2
公开(公告)日：2025-04-01
申请号：US18366176
申请日：2023-08-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Akshay Sarin , Alan B. Martin , Brian Podczervinski , Brian A. Welchko , Suresh Gopalakrishnan , Mark J. Moran
Abstract: A dual inverter open winding machine for a vehicle. The machine may include an electric motor, a first energy source, a first inverter, a second energy source, and a second inverter. The first inverter may include a plurality of first switches independently operable between an opened position and a closed position to selectively connect and disconnect a first direct current (DC) port and a first alternating current (AC) port with one or more of the first energy source, the first inverter, and the motor. The second inverter may include a plurality of second switches independently operable between an opened position and a closed position to selectively connect and disconnect a second DC port and a second AC port with one or more of the second energy source, the second inverter, and the motor.
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公开(公告)号：US12247893B2
公开(公告)日：2025-03-11
申请号：US18154462
申请日：2023-01-13
Applicant: GM Global Technology Operations LLC
Inventor： Dongxu Li , Chunhao J. Lee , Farzad Samie , Paul Guillermo Otanez , Suresh Gopalakrishnan
Abstract: A vehicle and a drive system include a method of operating the vehicle. In another exemplary embodiment, a drive system of a vehicle is disclosed. The drive system includes a first sensor, a second sensor and a processor. The first sensor is disposed at a first location of the drive system for measuring a first angle of rotation. The second sensor is disposed at a second location of the drive system for measuring a second angle of rotation. The processor is configured to determine a torque transferred between the first location and the second location based on a difference between the first angle of rotation and the second angle of rotation and control an operation of the drive system based on the torque.
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公开(公告)号：US12246615B2
公开(公告)日：2025-03-11
申请号：US18097375
申请日：2023-01-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
IPC: B60L58/12 , G01R31/3828 , H02M1/00
Abstract: A battery system for an electric vehicle includes at least one battery cell configured to store charge for powering an electric vehicle, a high voltage bus electrically coupled with the at least one battery, a DC-DC converter electrically coupled with the battery cell, a low voltage bus electrically connected between the DC-DC converter and at least one vehicle electrical component, and a cell monitor electrically coupled with the at least one battery cell and the DC-DC converter, wherein the cell monitor includes a current sensor configured to detect a current from the at least one battery cell to the DC-DC converter. The cell monitor includes a controller configured to estimate a state of charge of the at least one battery cell according to the current detected by the current sensor, and adjust switching operation of the DC-DC converter according to the current detected by the current sensor.
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公开(公告)号：US12233748B2
公开(公告)日：2025-02-25
申请号：US18336705
申请日：2023-06-16
Applicant: GM Global Technology Operations LLC
Inventor： Chunhao J. Lee , Suresh Gopalakrishnan , Yongjie Zhu , Dongxu Li , Muhammad Hussain Alvi
Abstract: A vehicle includes two or more battery packs configured to power a motor. A controller is configured to dynamically activate an operational mode during operation. The operational mode is one of multiple possible operational modes including a first operational mode defining a series connection between the two or more battery packs and second operational mode defining a parallel connection between the two or more battery packs. The connection between the battery packs is controlled by a first plurality of switches. A plurality of low voltage loads are connected to a subset of the battery packs in the battery packs such that a power output of the subset of the battery packs provides full power to the plurality of low voltage loads. The plurality of low voltage loads are connected to only the subset of the battery packs in both the first operational mode and the second operational mode.
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Patent Agency Ranking
公开(公告)号：US20250030362A1
公开(公告)日：2025-01-23
申请号：US18355717
申请日：2023-07-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Peng Peng , Lei Hao , Suresh Gopalakrishnan
Abstract: Some embodiments disclosed herein are directed to power transfer in electric motors having segmented windings. In some embodiments, a control system may determine a d-axis command voltage for a secondary winding of an electric motor and a q-axis command voltage for the secondary winding based on a primary winding voltage, primary winding current, secondary winding current, and rotor electrical position. The control system may generate gate control signals based on the determined d-axis command voltage and q-axis command voltage for the secondary winding, and transmit the gate control signals to an inverter coupled to the secondary winding to control an electrical power transfer between the primary winding and the secondary winding. Other embodiments may be disclosed or claimed.
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公开(公告)号：US20250001876A1
公开(公告)日：2025-01-02
申请号：US18343139
申请日：2023-06-28
Applicant: GM Global Technology Operations LLC
Inventor： Orgun A. Guralp , Suresh Gopalakrishnan , Chandra S. Namuduri
Abstract: A system for controlling a propulsion system of a vehicle includes a switching system including a first switching device connecting a battery system to a first set of windings of an electric motor, and a second switching device connecting the battery system to a second set of windings. The system also includes a controller configured to transition the propulsion system from an initial propulsion mode in which an initial voltage is applied to the electric motor, to a target mode in which a target voltage is applied. The transitioning includes controlling the first switching device to provide current to the first set of windings at the initial voltage to produce torque, and subsequently controlling the second switching device to cause the battery system to apply the target voltage to the second set of windings while the current is provided to the first set of windings at the initial voltage.
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公开(公告)号：US20240429713A1
公开(公告)日：2024-12-26
申请号：US18339606
申请日：2023-06-22
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Rashmi Prasad , Suresh Gopalakrishnan , Yilun Luo , Khorshed Mohammed Alam , Minh-Khai Nguyen
Abstract: An electric vehicle includes a drive system that performs a method of transferring power between a vehicle and an external location. The drive system includes a battery, a rectifier, and a processor. The rectifier is one of a two-level rectifier and a multi-level rectifier. The processor is configured to connect the rectifier between an alternating current (AC) port of an outlet of an external location and the battery. The rectifier is configured to convert between an AC power at the AC port on an external side of the rectifier and a direct current (DC) power at a vehicle side of the rectifier in order to transfer power bi-directionally between the external location and the battery.
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公开(公告)号：US20240235216A1
公开(公告)日：2024-07-11
申请号：US18151054
申请日：2023-01-06
Applicant: GM Global Technology Operations LLC
Inventor： Chunhao J. Lee , Suresh Gopalakrishnan , Dongxu Li , Muhammad Hussain Alvi , Yongjie Zhu
CPC classification number: H02J7/0024 , B60L58/12 , B60L58/19 , H02J7/0047 , H02J7/0063 , H02J7/00712 , H02J7/345
Abstract: A system for controlling propulsion in a vehicle includes a switching system connected to a battery system connected to a drive unit and to one or more electrical loads by a propulsion bus. A controller is configured to control the switching system to vary a voltage applied to the drive unit. The controller is configured to receive a request to transition between operating modes, the transition including a change of a voltage applied to the drive unit from an initial voltage level to a target voltage level. The controller is configured to sequentially perform deactivating the one or more electrical loads, based on the target voltage being higher than the initial voltage, pre-charging the one or more electrical loads, based on the target voltage being lower than the initial voltage, performing a discharge procedure, and operating the switching system to apply the voltage at the target voltage level.
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公开(公告)号：US12034134B2
公开(公告)日：2024-07-09
申请号：US17477670
申请日：2021-09-17
Applicant: GM Global Technology Operations LLC
Inventor： Lyall Kenneth Winger , Dave Gerard Rich , James Morrison , Suresh Gopalakrishnan , Chandra S. Namuduri
IPC: H01M10/613 , B60L50/64 , B60L58/26 , H01M50/249
CPC classification number: H01M10/613 , B60L50/64 , B60L58/26 , H01M50/249
Abstract: A battery system for a vehicle includes a battery tray having a base wall, a plurality of side walls, and a cover that collectively define a receiving zone. A vent includes an inlet and an outlet exposed to the battery receiving zone. A battery is supported by the base wall. A battery electronic controller (BEC) is arranged in the receiving zone and directly connected to the battery.
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