公开(公告)号：US12155244B2

公开(公告)日：2024-11-26

申请号：US17988000

申请日：2022-11-16

Applicant: GM Global Technology Operations LLC

Inventor： Chandra S. Namuduri ,  Suresh Gopalakrishnan ,  Lei Hao ,  Venkata Prasad Atluri ,  Rashmi Prasad

IPC: B60L50/15 ,  B60L50/60 ,  B60L53/14 ,  B60L53/60 ,  H01M10/42 ,  H01M10/44 ,  H01M50/583 ,  H02J7/00

Abstract: An electric vehicle includes an electrical system and performs a method of charging the electric vehicle. The electrical system includes a first battery subpack, a second battery subpack, wherein the first battery subpack, the second battery subpack, and an electrical load of the electric vehicle are connected in parallel, and a processor. The processor is configured to control a first connection between the first battery subpack and a first charge port and a second connection between the second battery subpack and a second charge port to charge each of the first battery subpack and the second battery subpack while providing power to the electrical load.

公开(公告)号：US12151573B2

公开(公告)日：2024-11-26

申请号：US17948597

申请日：2022-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rashmi Prasad

IPC: B60L7/06 ,  B60L7/26 ,  B60L50/60 ,  B60L53/24 ,  H02J7/00 ,  H02M3/158 ,  H02P5/74

Abstract: A charging system of a vehicle includes a first conversion device of a first drive system of the vehicle, the first conversion device connected to a first electric motor. The system also includes a second conversion device of a second drive system of the vehicle, the second conversion device connected to a second electric motor. The first drive system and the second drive system are connected to a battery system of the vehicle. The system also includes a switching assembly including a plurality of switches configured to selectively connect the first electric motor and/or the second electric motor to a charge port of the vehicle, and a controller configured to control the switching assembly to define a conversion circuit that includes components of the first drive system and/or the second drive system, and control the conversion circuit to regulate an output voltage and supply power to an energy storage system.

公开(公告)号：US12139040B2

公开(公告)日：2024-11-12

申请号：US18076455

申请日：2022-12-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad Hussain Alvi ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri

IPC: B60L58/19 ,  H01M10/44 ,  H02J7/00 ,  H02M3/158

Abstract: An electric drive system for an electric vehicle is provided. The electric drive system includes a first electric drive, a second electric drive, and a switchable battery including at least two battery packs that are selectively arranged in one of a series configuration and a parallel configuration. The electric drive system also includes a first half-bridge buck converter connecting the first electric drive to a first battery back of the at least two battery packs of the switchable battery and a second half-bridge buck converter connecting the second electric drive to a second battery back of the at least two battery packs of the switchable battery. The electric drive system further includes a controller configured to control the configuration of the switchable battery, an operation of the first half-bridge buck converter, and the second half-bridge buck converter.

公开(公告)号：US20240367552A1

公开(公告)日：2024-11-07

申请号：US18311494

申请日：2023-05-03

Applicant: GM Global Technology Operations LLC

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

IPC: B60L58/27 ,  H01M10/615 ,  H01M10/625 ,  H01M10/6571 ,  H02P21/18 ,  H02P21/22 ,  H02P27/12 ,  H05B1/02

Abstract: A method and apparatus for heating a battery pack in an electrified vehicle provides a zero d-axis current command and a zero q-axis current command to a field-oriented controller for an alternating current (AC) motor coupled to the battery pack through a power inverter module controlled by the field-oriented controller. An AC signal is injected onto the d-axis of the field-oriented controller resulting in an AC current through the battery pack effecting AC resistance heating.

公开(公告)号：US20240359596A1

公开(公告)日：2024-10-31

申请号：US18307308

申请日：2023-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Suresh Gopalakrishnan ,  Neeraj S. Shidore ,  Chandra S. Namuduri ,  Lei Hao ,  Satish P. Ketkar ,  Christian Fau ,  Lyall Kenneth Winger

IPC: B60L58/27 ,  H01M10/0525 ,  H01M10/46 ,  H01M10/48 ,  H01M10/625 ,  H01M10/657 ,  H02J7/00 ,  H02J7/02

CPC classification number: B60L58/27 ,  H01M10/0525 ,  H01M10/46 ,  H01M10/486 ,  H01M10/625 ,  H01M10/657 ,  H02J7/007194 ,  H02J7/02 ,  B60L2210/10 ,  H01M2220/20

Abstract: A vehicle having an ambient temperature sensor, a low voltage lithium-ion battery and a controller is provided. The controller is configured to monitor the ambient temperature sensor and based on a determination that an ambient temperature is below a threshold value, provide an alternating current power to the low voltage lithium-ion battery. The alternating current power causes the low voltage lithium-ion battery to heat.

公开(公告)号：US20240356362A1

公开(公告)日：2024-10-24

申请号：US18303123

申请日：2023-04-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chandra S. Namuduri ,  Rashmi Prasad

IPC: H02J7/34 ,  B60L53/22 ,  H02J7/02 ,  H02M1/08 ,  H02M3/335 ,  H02M7/219

CPC classification number: H02J7/342 ,  B60L53/22 ,  H02J7/02 ,  H02M1/08 ,  H02M3/33573 ,  H02M7/219 ,  B60L2210/10 ,  H02J2207/20

Abstract: A charging system of a vehicle includes a charging device configured to transfer an electric charge between a battery system of the vehicle and a recipient energy storage system, the charging device including a plurality of conversion stages. The charging system also includes a switching system configured to selectively bypass one or more conversion stages during a charging process, the charging process including transferring electric charge from the battery system to the recipient energy storage system, and a first controller configured to operate the switching system based on a voltage range of a recipient charge port of the recipient energy storage system.

公开(公告)号：US12097784B2

公开(公告)日：2024-09-24

申请号：US18166612

申请日：2023-02-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mohamed Kamel ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Jun-mo Kang ,  Muhammad Hussain Alvi

IPC: B60L58/20 ,  H02J7/00

CPC classification number: B60L58/20 ,  H02J7/0031 ,  H02J7/0063 ,  B60L2210/10 ,  B60L2240/545 ,  B60L2240/547 ,  H02J2310/48

Abstract: Fuse configurations for a distributed power architecture of a vehicle is provided. The distributed power architecture includes a high-voltage battery pack having a plurality of batteries and a plurality of converters, each of the plurality of converters being configured to receive high-voltage power from one of the plurality of batteries and to provide low-voltage power to a low-voltage bus. The distributed power architecture also includes a plurality of fuses disposed on one or more of an input side and an output side of each of the plurality of converters and a vehicle controller with at least one communication link to each of the plurality of power converters. Each of the plurality of fuses are configured to selectively prevent current flow through one of the plurality of converters.

公开(公告)号：US12074590B2

公开(公告)日：2024-08-27

申请号：US17731911

申请日：2022-04-28

Applicant: GM Global Technology Operations LLC

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Lyall Kenneth Winger ,  James M. Morrison

IPC: B60R16/03 ,  H03K17/08

CPC classification number: H03K17/08 ,  B60R16/03

Abstract: A system in a vehicle includes a first fuse connected between a power source and a load. The first fuse is an electronic fuse (eFuse) to disconnect the load from the power source via the first fuse based on opening a first fuse switch. The system also includes a second fuse connected between the power source and the load via a second fuse switch. The first fuse and the second fuse are part of a cluster of fuses. A controller opens the first fuse switch and keeps the second fuse switch closed based on the vehicle entering a key-off mode in which the vehicle is turned off.

公开(公告)号：US20240239235A1

公开(公告)日：2024-07-18

申请号：US18097375

申请日：2023-01-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mohamed Ahmed Kamel AHMED ,  Chandra S. Namuduri ,  Suresh Gopalakrishnan

IPC: B60L58/12 ,  G01R31/3828 ,  H02M1/00

CPC classification number: B60L58/12 ,  G01R31/3828 ,  H02M1/0009 ,  B60L2210/10 ,  B60L2240/54 ,  H02J2310/48

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.

公开(公告)号：US12027900B1

公开(公告)日：2024-07-02

申请号：US18096592

申请日：2023-01-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Mohamed Ahmed Kamel Ahmed ,  Chandra S. Namuduri ,  Jun-mo Kang

IPC: H02J7/00 ,  B60L50/60 ,  H02M3/00 ,  H05K7/20

CPC classification number: H02J7/0063 ,  B60L50/60 ,  H02M3/003 ,  H05K7/20845 ,  B60L2210/10 ,  H02J2207/20

Abstract: A battery system for a vehicle includes multiple battery cells each configured to store charge for powering an electric vehicle, a high voltage bus electrically coupled with the multiple battery cells to provide power to an electric motor, and multiple cell monitoring modules each coupled with a corresponding one of the multiple battery cells, each cell monitoring module including a controller configured to monitor operation parameters of the corresponding one of the multiple battery cells. The system includes multiple DC-DC converters in a converter housing, each DC-DC converter electrically coupled with a corresponding one of the multiple battery cells outside of the converter housing, and a low voltage bus electrically connected between the multiple DC-DC converters in the converter housing and at least one vehicle electrical component outside of the converter housing. The low voltage bus is configured to provide low voltage power to at least one vehicle electrical component.