公开(公告)号：US20220201845A1

公开(公告)日：2022-06-23

申请号：US17132242

申请日：2020-12-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi PRASAD ,  Chandra S. NAMUDURI ,  Muhammad H. ALVI

IPC: H05K1/02 ,  H05K1/18 ,  H05K1/14 ,  H02P27/06

Abstract: A bi-directional solid state switch includes: a first bus bar; a second bus bar; a first solid state switch implemented on a first printed circuit board (PCB), the first solid state switch including: a first control terminal; a first terminal electrically connected to the first bus bar; and a second terminal; and a second solid state switch implemented on a second PCB, the second solid state switch including: a second control terminal; a third terminal electrically connected to the second terminal of the first solid state switch; and a fourth terminal electrically connected to the second bus bar.

公开(公告)号：US20220310481A1

公开(公告)日：2022-09-29

申请号：US17215883

申请日：2021-03-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad H. ALVI ,  Ming LIU ,  Rashmi PRASAD ,  Anthony M. COPPOLA

IPC: H01L23/473 ,  H01L25/065 ,  H05K7/20

Abstract: A power module is provided and includes first stack, second stack, and third stacks of layers, a heat pipe, and at least one cold plate or heat sink. The third stack of layers is disposed between the first stack of layers and the second stack of layers and includes a first semiconductor die, a second semiconductor die and a center spacer layer disposed between the first semiconductor die and the second semiconductor die. The heat pipe extends at least partially into the center spacer layer. The at least one cold plate or heat sink receives thermal energy from the first stack of layers and the second stack of layers. The second stack of layers, the third stack of layers, the heat pipe and the at least one cold plate or heat sink facilitate dual sided cooling of each of the first semiconductor die and the second semiconductor die.

公开(公告)号：US20240243596A1

公开(公告)日：2024-07-18

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.

公开(公告)号：US20230344293A1

公开(公告)日：2023-10-26

申请号：US17729216

申请日：2022-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi PRASAD ,  Chandra S. NAMUDURI ,  Lei HAO ,  Suresh GOPALAKRISHNAN

IPC: H02K3/28 ,  H02K11/33

CPC classification number: H02K3/28 ,  H02K11/33

Abstract: A method includes: selectively actuating switches of an inverter module and first, second, third, and fourth switches of a motor; and charging a battery with power from a charger using at least one of first, second, and third stator windings of the motor, the battery having a first voltage and being electrically connected in parallel with the inverter module, and the charger having a second voltage that is less than the first voltage.

公开(公告)号：US20230378776A1

公开(公告)日：2023-11-23

申请号：US17749215

申请日：2022-05-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi PRASAD ,  Chandra S. NAMUDURI

IPC: H02J7/00 ,  H01H71/12 ,  B60L53/10

CPC classification number: H02J7/0031 ,  H01H71/12 ,  B60L53/11 ,  H02J7/0068

Abstract: A battery system includes a battery pack configured to be selectively connected to an output terminal of the battery system and a DCFC receptacle, a first contactor that is connected between the DCFC receptacle and a first terminal of the battery pack, and a first SSR connected in series with the first contactor between the DCFC receptacle and the first terminal of the battery pack. The first SSR has an open state where current from the DCFC receptacle to the battery pack is interrupted and a dosed state where current flows from the DCFC receptacle to the battery pack, the first SSR is configured to transition from the dosed state to the open state prior to the first contactor, and current only flows from the DCFC receptacle to the battery pack when both the first contactor and the first SSR are in the closed state.

公开(公告)号：US20230299695A1

公开(公告)日：2023-09-21

申请号：US17699261

申请日：2022-03-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad Hussain ALVI ,  Chandra S. NAMUDURI ,  Suresh GOPALAKRISHNAN ,  Chunhao J. LEE ,  Lei HAO ,  Yue-Yun WANG ,  Rashmi PRASAD

IPC: H02P5/74 ,  H02J7/00 ,  H02P23/14

CPC classification number: H02P5/74 ,  H02J7/0063 ,  H02J7/0013 ,  H02P23/14

Abstract: A power control system comprises a battery system including N battery packs. A plurality of contactors selectively connects N battery packs of a battery system in a first configuration supplying a first voltage level, a second configuration supplying a second voltage level, and a disconnected configuration. M power inverters connect the battery system to M electric machines, respectively. A controller is configured to determine when to transition between the first configuration and the second configuration. The controller is configured to transition between the first configuration and the second configuration by causing one of a positive torque transient and a negative torque transient to be generated by at least one of the M electric machines, transitioning the battery system from one of the first configuration and the second configuration to the disconnected configuration, and transitioning from the disconnected configuration to the other one of the first configuration and the second configuration.

公开(公告)号：US20220402395A1

公开(公告)日：2022-12-22

申请号：US17350696

申请日：2021-06-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi PRASAD ,  Chandra S. NAMUDURI ,  Suresh GOPALAKRISHNAN ,  Thomas W. NEHL ,  David J. BROOKS

IPC: B60L53/60 ,  B60L50/60

Abstract: A charging system includes a scalable power source for powering a motor of a vehicle and telematics and battery management modules. The scalable power source includes: N battery packs, where N is an integer greater than or equal to 3; and multiple switches connected to the N battery packs including N−1 switches for serially connecting the N battery packs between supply and return lines and a multiple of N switches for parallel connecting the N battery packs to the supply and return lines. The telematics module requests capability of a charging station and receives a response signal from a device indicating the capability of the charging station. The battery management module: based on the capability of the charging station, selects one of the available arrangements in which to connect the N battery packs, sets states of the multiple switches; and then charges the N battery packs based on the states.