公开(公告)号：US20220271552A1

公开(公告)日：2022-08-25

申请号：US17184968

申请日：2021-02-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James C. Gibbs ,  Andrew M. Zettel ,  Calvin Goodman ,  Rajesh Nagappala

IPC: H02J7/00 ,  B60L50/51 ,  B60L50/60 ,  B60L58/12

Abstract: A method for adapting a usage level of a battery pack includes measuring cell sense data for each respective battery cell using a cell sense circuit, the cell sense data including a cell voltage, current, and temperature. The method includes processing the cell sense data, for each respective battery cell, through multiple battery state functions of a controller to generate numeric cell degradation values (CDVs). The battery state functions are calibrated relationships of the cell sense data to predetermined battery fault conditions. Thereafter, the method includes automatically adapting the usage level of the battery pack during operation of the battery pack, via the controller, based on the numeric CDVs. An electric powertrain system includes the battery pack, cell sense circuit, a rotary electric machine, and a controller configured to execute the above method.

公开(公告)号：US11858354B2

公开(公告)日：2024-01-02

申请号：US17717286

申请日：2022-04-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li-Pen John Ho ,  Calvin Goodman ,  Rajesh Nagappala

IPC: B60L3/04 ,  B60L3/00 ,  H02J7/00 ,  H02H7/18 ,  H01H39/00

CPC classification number: B60L3/04 ,  B60L3/0046 ,  H01H39/006 ,  H02H7/18 ,  H02J7/0031 ,  H01H2039/008

Abstract: An emergency disconnect circuit for use with a high-voltage (HV) bus of a battery electric system, e.g., aboard a mobile system, includes a pyrotechnic switch and a manual switch. The pyrotechnic switch configured irreversibly opens in response to an electronic triggering signal to disconnect an HV battery pack from the HV bus in a first manner. The manual switch is arranged on a low-voltage (LV) bus in series with and between the pyrotechnic switch and an LV power supply. Transition of the manual switch from an open position to a closed position connects the LV power supply to the pyrotechnic switch. This causes the LV power supply to discharge the triggering signal to the pyrotechnic switch. When used aboard a mobile system, an electronic monitoring unit generates the triggering signal in a second manner in response to a threshold impact event.

公开(公告)号：US11967851B2

公开(公告)日：2024-04-23

申请号：US17184968

申请日：2021-02-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James C. Gibbs ,  Andrew M. Zettel ,  Calvin Goodman ,  Rajesh Nagappala

IPC: H01M50/55 ,  B60L50/51 ,  B60L50/60 ,  B60L58/12 ,  H01M10/48 ,  H02J7/00

CPC classification number: H02J7/00712 ,  B60L50/51 ,  B60L50/66 ,  B60L58/12 ,  H02J7/0013 ,  H02J7/0029 ,  H02J7/0048 ,  H02J7/005 ,  H02J7/007194 ,  B60L2210/40 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/549

Abstract: A method for adapting a usage level of a battery pack includes measuring cell sense data for each respective battery cell using a cell sense circuit, the cell sense data including a cell voltage, current, and temperature. The method includes processing the cell sense data, for each respective battery cell, through multiple battery state functions of a controller to generate numeric cell degradation values (CDVs). The battery state functions are calibrated relationships of the cell sense data to predetermined battery fault conditions. Thereafter, the method includes automatically adapting the usage level of the battery pack during operation of the battery pack, via the controller, based on the numeric CDVs. An electric powertrain system includes the battery pack, cell sense circuit, a rotary electric machine, and a controller configured to execute the above method.

公开(公告)号：US20230322088A1

公开(公告)日：2023-10-12

申请号：US17717286

申请日：2022-04-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li-Pen John Ho ,  Calvin Goodman ,  Rajesh Nagappala

IPC: B60L3/04 ,  B60L3/00 ,  H01H39/00 ,  H02J7/00 ,  H02H7/18

CPC classification number: B60L3/04 ,  B60L3/0046 ,  H01H2039/008 ,  H02J7/0031 ,  H02H7/18 ,  H01H39/006

Abstract: An emergency disconnect circuit for use with a high-voltage (HV) bus of a battery electric system, e.g., aboard a mobile system, includes a pyrotechnic switch and a manual switch. The pyrotechnic switch configured irreversibly opens in response to an electronic triggering signal to disconnect an HV battery pack from the HV bus in a first manner. The manual switch is arranged on a low-voltage (LV) bus in series with and between the pyrotechnic switch and an LV power supply. Transition of the manual switch from an open position to a closed position connects the LV power supply to the pyrotechnic switch. This causes the LV power supply to discharge the triggering signal to the pyrotechnic switch. When used aboard a mobile system, an electronic monitoring unit generates the triggering signal in a second manner in response to a threshold impact event.