公开(公告)号：US20240351473A1

公开(公告)日：2024-10-24

申请号：US18304003

申请日：2023-04-20

Applicant: GM Global Technology Operations LLC

Inventor： Mohamed Ahmed Kamel Ahmed ,  Chandra S. Namuduri

IPC: B60L58/18 ,  H02J7/00 ,  H02J7/34

CPC classification number: B60L58/18 ,  H02J7/0047 ,  H02J7/00712 ,  H02J7/342

Abstract: An electric vehicle, system and method of charge transfer at the electric vehicle. The vehicle includes a charging circuit and a processor. The charging circuit includes a first battery, a second battery and a motor winding. The processor determines a desired reference current of the motor winding, a first voltage of the first battery and a second voltage of the second battery, calculates a power loss for each of a plurality of conduction modes based on the desired reference current, the first voltage and the second voltage, wherein each of the plurality of conduction modes transfers charge between the first battery and the second battery, selects a conduction mode from the plurality of conduction modes that has a least power loss, establishes a duty cycle parameter for the selected mode, and applies the conduction mode and the duty cycle parameter to the charging circuit to transfer the charge.

公开(公告)号：US12095352B2

公开(公告)日：2024-09-17

申请号：US17826592

申请日：2022-05-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Lei Hao

IPC: H02M1/14 ,  B60L50/51 ,  B60L50/60 ,  H02P27/08 ,  H02M7/5395

CPC classification number: H02M1/143 ,  B60L50/51 ,  B60L50/60 ,  H02P27/085 ,  H02M7/5395

Abstract: A power control system for an electric vehicle comprises N power inverters configured to connect to a battery system of the electric vehicle. Each of the N power inverters includes a plurality of power switches, where N is an integer greater than one. The N power inverters are configured to connect to stator phase windings of N electric machines, respectively. A controller is configured to determine a switching frequency for the N electric machines and (N−1) phase offsets for (N−1) ones of the N electric machines, generate a set of pulse width modulation (PWM) switching signals at the switching frequency for a first one of the N power inverters, and output (N−1) sets of PWM switching signals to the (N−1) ones of the N electric machines based on the set of PWM switching signals and the (N−1) phase offsets.

公开(公告)号：US20240297516A1

公开(公告)日：2024-09-05

申请号：US18177522

申请日：2023-03-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chunhao J. Lee ,  Dongxu Li ,  Suresh Gopalakrishnan ,  Lei Hao ,  Chandra S. Namuduri

IPC: H02J7/00 ,  B60L50/50 ,  H02M3/04

CPC classification number: H02J7/0063 ,  B60L50/50 ,  H02J7/0068 ,  H02M3/04

Abstract: A system for supplying power to one or more electrical loads in a vehicle includes a conversion system connected to a battery system, the battery system configured to provide a voltage to a propulsion system of the vehicle via a propulsion bus, the conversion system including a conversion device and a pre-charge circuit selectively connected to the propulsion bus by a first switch, the conversion system selectively connected to the one or more electrical loads. The system also includes a controller configured to operate the conversion system to electrically connect the conversion device and the pre-charge circuit to the battery system and the one or more electrical loads, the controller configured to adjust a battery system voltage from the battery system to a load voltage of the one or more electrical loads based on a mismatch between the battery system voltage and the load voltage.

公开(公告)号：US12051985B2

公开(公告)日：2024-07-30

申请号：US17694865

申请日：2022-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lei Hao ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Dongxu Li

IPC: H02P25/18 ,  B60L50/50 ,  B60L53/16 ,  H02J7/02 ,  H02K3/28 ,  H02M7/797 ,  H02P27/08

CPC classification number: H02P25/18 ,  B60L50/50 ,  B60L53/16 ,  H02J7/02 ,  H02K3/28 ,  H02M7/797 ,  H02P27/08 ,  B60L2210/44

Abstract: An electric machine includes: a first stator winding including first and second stator winding portions; a second stator winding including third and fourth stator winding portions; a third stator winding including fifth and sixth stator winding portions, where inputs of the stator windings are configured to be connected to phases, respectively, of an inverter; and switches connected between the stator winding portions and outputs of a power source.

公开(公告)号：US12046946B2

公开(公告)日：2024-07-23

申请号：US17889017

申请日：2022-08-16

Applicant: GM Global Technology Operations LLC

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Norman K. Bucknor ,  Lyall Kenneth Winger ,  James Morrison ,  David W. Walters

IPC: H02J9/06 ,  B60L53/20 ,  B60L58/10 ,  G01R19/165 ,  H02J7/00

CPC classification number: H02J9/061 ,  B60L53/20 ,  B60L58/10 ,  G01R19/16576 ,  H02J7/0063 ,  H02J7/00712 ,  B60L2210/10

Abstract: A vehicle, an electrical system of the vehicle and a method of operating the vehicle. The electrical system includes a battery, an electrical load that draws power from the battery, a switch between the battery and the electrical load, and a processor. The processor is configured to measure a power drawn from the battery by the electrical load and open the switch to disconnect the battery from the electrical load when the power drawn by the electrical load matches a selected criterion.

公开(公告)号：US20240234238A1

公开(公告)日：2024-07-11

申请号：US18150379

申请日：2023-01-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rashmi Prasad

IPC: H01L23/373 ,  H01L21/48 ,  H01L23/15 ,  H01L23/38 ,  H01L23/498

CPC classification number: H01L23/3735 ,  H01L21/4846 ,  H01L21/4882 ,  H01L23/15 ,  H01L23/38 ,  H01L23/49833 ,  H01L23/49844 ,  H01L24/32

Abstract: Aspects of the disclosure include a power module having enhanced thermal management. An exemplary power module can include a direct bond copper (DBC) substrate having a top copper layer, a bottom copper layer, and a dielectric layer between the top copper layer and the bottom copper layer. The power module includes a thin-film thermoelectric cooler (TFTEC) having a thermoelectric film positioned between a top insulator and a bottom insulator. One or more dies are positioned over the DBC substrate and the TFTEC and a controller is configured to adjust a thermoelectric device current of the TFTEC responsive to a temperature of the one or more dies.

公开(公告)号：US20240204284A1

公开(公告)日：2024-06-20

申请号：US18085050

申请日：2022-12-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shuonan Xu ,  Neeraj S. Shidore ,  Robert D. Schmidt ,  Steven Earl Muldoon ,  Chandra S. Namuduri ,  Robert D. Drexler ,  Antonio Duaine Ulisse

IPC: H01M10/615 ,  G01R31/389 ,  H01M10/48 ,  H01M10/63 ,  H01M10/657

CPC classification number: H01M10/615 ,  G01R31/389 ,  H01M10/486 ,  H01M10/63 ,  H01M10/657

Abstract: A device for thermal control of a battery system includes a heating control module configured to generate an alternating current (AC) heating current and heat the battery system to a desired temperature by applying the AC heating current to the battery system over a selected heating time duration. The heating control module is configured to monitor a rate of increase of a temperature of the battery system during the applying, during the heating time duration, perform a periodic impedance measurement, the periodic impedance measurement including application of a measurement signal having a selected frequency range to the battery system for a measurement period, a length of the measurement period select to minimize a difference between a desired rate of increase and the monitored rate of increase, and adjust the AC heating current during the applying based on the temperature and the impedance measurement.

公开(公告)号：US20240181928A1

公开(公告)日：2024-06-06

申请号：US18072911

申请日：2022-12-01

Applicant: GM Global Technology Operations LLC

Inventor： Chandra S. Namuduri ,  Madhusudan Raghavan

IPC: B60L58/20 ,  B60L53/16 ,  B60L53/62 ,  H02J7/00

CPC classification number: B60L58/20 ,  B60L53/16 ,  B60L53/62 ,  H02J7/0024

Abstract: An apparatus and method for charging an electrified vehicle through a charge port selectively configures a plurality of battery packs including battery packs having a voltage N with a plurality of controllable switches into one of several charging configurations which may include presenting the charge port with voltage N, 2N or 3N.

公开(公告)号：US11999263B2

公开(公告)日：2024-06-04

申请号：US17982775

申请日：2022-11-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Orgun A. Guralp ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Chunhao J. Lee ,  Muhammad Hussain Alvi

IPC: B60L58/19 ,  B60L50/60 ,  B60L58/21

CPC classification number: B60L58/19 ,  B60L50/66 ,  B60L58/21

Abstract: A system for controlling propulsion in a vehicle includes a switching system connected to a battery system and a propulsion system. The battery system includes a first battery assembly and a second battery assembly, the propulsion system includes a first drive unit and a second drive unit, and the switching system includes a first switching device configured to selectively connect the first drive unit to the battery system and a second switching device configured to selectively connect the second drive unit to the battery system. The first switching device and the second switching device are independently operable. The system also includes a controller configured to operate the switching system to vary a voltage applied to at least one of the first drive unit and the second drive unit during vehicle propulsion.

公开(公告)号：US11962173B2

公开(公告)日：2024-04-16

申请号：US17718362

申请日：2022-04-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lei Hao ,  Yue-Yun Wang ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Madhusudan Raghavan

IPC: H02J7/00 ,  B60L53/18 ,  B60L53/24 ,  B60W10/08 ,  H02J7/14

CPC classification number: H02J7/0019 ,  B60L53/18 ,  B60L53/24 ,  B60W10/08 ,  B60L2240/423

Abstract: A system for use with a direct current fast-charging (DCFC) station includes a controller and battery system. The battery system includes first and second battery packs, and first, second, and third switches. The switches have ON/OFF conductive states commanded by the controller to connect the battery packs in a parallel-connected (P-connected) or series-connected (S-connected) configuration. An electric powertrain with one or more electric machines is powered via the battery system. First and second charge ports of the system are connectable to the station via a corresponding charging cable. The first charge port receives a low or high charging voltage from the station. The second charge port receives a low charging voltage. When the station can supply the high charging voltage to the first charge port, the controller establishes the S-connected configuration via the switches, and thereafter charges the battery system solely via the first charge port.