公开(公告)号：US20240380334A1

公开(公告)日：2024-11-14

申请号：US18315081

申请日：2023-05-10

Applicant: GM Global Technology Operations LLC

Inventor： Muhammad Hussain Alvi ,  Renato Amorim Torres ,  Chandra S. Namuduri ,  Rashmi Prasad

IPC: H02M7/483 ,  B60L50/51

Abstract: A multilevel inverter includes a set of inverter switches arranged in a multilevel inverter topology. The multilevel inverter topology has a high voltage (V) input, a low voltage input and an intermediate voltage input. A first voltage source connects the high voltage input to the intermediate voltage input and a second voltage source connects the intermediate voltage input to the low voltage source.

公开(公告)号：US20240363288A1

公开(公告)日：2024-10-31

申请号：US18308201

申请日：2023-04-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Junghoon Kim ,  Muhammad Hussain Alvi ,  Rashmi Prasad ,  Chandra S. Namuduri ,  Yilun Luo

IPC: H01G4/30 ,  B60L50/60 ,  H01G4/228

CPC classification number: H01G4/30 ,  B60L50/60 ,  H01G4/228 ,  B60L2210/10 ,  B60L2210/40

Abstract: Aspects of the disclosure include a symmetric direct current (DC) link capacitor having a low parasitic equivalent series L-inductance (ESL). An exemplary capacitor can include one or more positive-dielectric-negative (PDN) stacks having a positive layer, a negative layer, and a dielectric layer between the positive layer and the negative layer. A first contact layer is electrically coupled to the positive layer on a sidewall of the one or more PDN stacks and a second contact layer is electrically coupled to the negative layer on the sidewall of the one or more PDN stacks. A positive terminal is electrically coupled to the first contact layer and a negative terminal is electrically coupled to the second contact layer.

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：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.

公开(公告)号：US11865945B2

公开(公告)日：2024-01-09

申请号：US17839769

申请日：2022-06-14

Applicant: GM Global Technology Operations LLC

Inventor： Mohamed Kamel ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Muhammad Hussain Alvi ,  Lyall Kenneth Winger

IPC: B60L58/22 ,  H02M7/537 ,  B60L53/60 ,  H02J1/10 ,  B60L58/18 ,  H02M1/00 ,  H02J7/00

CPC classification number: B60L58/22 ,  B60L53/60 ,  B60L58/18 ,  H02J1/102 ,  H02J7/0019 ,  H02M1/007 ,  H02M1/0074 ,  H02M7/537 ,  B60L2210/10 ,  B60L2210/40 ,  H02J2310/48

Abstract: A rechargeable energy storage system may include a series arrangement of a plurality of batteries coupled to a first DC bus at a first DC voltage. A DC to DC converter may include a multi-input DC input stage coupled to a multi-output DC output stage. The multi-input DC input stage may include multiple distributed DC inputs, each distributed DC input being coupled to a respective one of the plurality of batteries. The multi-output DC output stage may include multiple aggregated DC outputs. At least one controllable switch may couple one or more of the multiple aggregated DC outputs to one or more other DC buses.

公开(公告)号：US20230369879A1

公开(公告)日：2023-11-16

申请号：US17743737

申请日：2022-05-13

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Avoki M. Omekanda

IPC: H02J7/34 ,  H02M3/335

CPC classification number: H02J7/342 ,  H02M3/335 ,  B60L50/60

Abstract: Electrical energy is transferred between an on-vehicle DC power source and an off-vehicle DC power source by controlling conduction of the phase legs of a power inverter to operatively configure the power inverter and the stator phase windings of a traction motor as a switched-mode power converter including the at least one phase winding and at least one switch of one of the phase legs.

公开(公告)号：US20230168284A1

公开(公告)日：2023-06-01

申请号：US17540081

申请日：2021-12-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad Hussain Alvi ,  Chandra S. Namuduri ,  Rashmi Prasad ,  Renato Amorim Torres

IPC: G01R15/16 ,  B60L58/10 ,  B60L53/30

CPC classification number: G01R15/16 ,  B60L58/10 ,  B60L53/305 ,  B60L2210/40

Abstract: A detection system for a capacitor of a power inverter of an electric vehicle includes a protection circuit including a current sensor and a power switch having a first terminal in communication with a battery system of the electric vehicle. The protection circuit is configured to selectively generate a pulse and to sense a measured current flowing through the power switch. A voltage sensor configured to sense a measured voltage across the capacitor. A controller in communication with the voltage sensor and the protection circuit is configured to estimate a capacitance value of the capacitor based on the measured current and the measured voltage.

公开(公告)号：US11569745B2

公开(公告)日：2023-01-31

申请号：US17208157

申请日：2021-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: H02M3/158 ,  H02P27/08 ,  B60L53/24 ,  H02M7/5387

Abstract: An example electrical system is disclosed. The electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system can include a plurality of machine windings connected between the power inverter and a switch. The switch can be configured to transition between a closed state to allow current flow from an off-board power source through the plurality of machine windings to the RESS and an open state to prevent current flow between the off-board power source and the plurality of machine windings.

公开(公告)号：US20220304180A1

公开(公告)日：2022-09-22

申请号：US17838653

申请日：2022-06-13

Applicant: GM Global Technology Operations LLC

Inventor： Muhammad H. Alvi ,  Rashmi Prasad ,  Chandra S. Namuduri

IPC: H05K7/14

Abstract: A busbar assembly includes a base having a width and a length. The base has a first surface and a second surface and has a first side and a second side. A distance between the first side and the second side comprises the width, and the base defines a slot centered between approximately 75% and approximately 79% of the width.

公开(公告)号：US20220302867A1

公开(公告)日：2022-09-22

申请号：US17208160

申请日：2021-03-22

Applicant: GM Global Technology Operations LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri

IPC: H02P27/08 ,  H02M7/5387 ,  B60L50/60

Abstract: An electrical system can include a rechargeable energy storage system (RESS) and a power inverter connected to the RESS. The power inverter can be configured to provide electrical power to a traction motor. The electrical system includes a plurality of machine windings connected between a plurality of first switches and the traction motor. Each switch of the plurality of first switches is configured to transition between a closed state to allow current flow between the power inverter and the traction motor. The electrical system includes a plurality of inductor windings connected between a plurality of second switches and an off-board power source. Each switch of the plurality of second switches is configured to transition between a closed state to allow current flow between the off-board power source and the power inverter to charge the RESS.