公开(公告)号：US20230221375A1

公开(公告)日：2023-07-13

申请号：US17647962

申请日：2022-01-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Yue-Yun Wang ,  Steven Earl Muldoon ,  Lei Hao ,  Michael P. Barker

IPC: G01R31/392 ,  H01M10/48

CPC classification number: G01R31/392 ,  H01M10/48 ,  H01M2220/20

Abstract: Systems and methods for diagnosing health of a battery using in-vehicle impedance analysis. The method includes receiving a sensed current measurement for a cell of the battery; generating a current profile as a function of the sensed current measurement, including pulses to a peak current, the pulses having a pulse frequency (w); applying a current with the current profile to the cell; for each pulse in the current profile, receiving a voltage measurement for the cell that is responsive to the pulse, calculating an impedance for the cell responsive thereto, the impedance comprising a real component at the pulse frequency (RZw), and an imaginary component at the pulse frequency (IZw), identifying a battery health problem when either RZw exceeds a preprogrammed first threshold for the pulse frequency, or when IZw exceeds a preprogrammed second threshold for the pulse frequency, and storing the RZw and the IZw for the cell.

公开(公告)号：US20240418789A1

公开(公告)日：2024-12-19

申请号：US18334015

申请日：2023-06-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rasoul Salehi ,  Steven Earl Muldoon ,  Yue-Yun Wang ,  Wen-Chiao Lin

IPC: G01R31/392 ,  G01R31/389 ,  G01R31/396 ,  H01M10/48

Abstract: Techniques are provided for battery imbalance diagnosis and mitigation. In one embodiment, the techniques involve isolating, via a first isolation unit, a first battery cell from a plurality of battery cells, determining, via a complex impedance measurement unit, a state of health of the first battery cell, and controlling, via a controller, the first battery cell based on the state of health of the first battery cell.

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：US20240079662A1

公开(公告)日：2024-03-07

申请号：US17939529

申请日：2022-09-07

Applicant: GM Global Technology Operations LLC

Inventor： Lei Hao ,  Yue-Yun Wang ,  Steven Earl Muldoon ,  Michael P. Barker ,  Yongjie Zhu

IPC: H01M10/42 ,  H01M10/48 ,  H01M50/267

CPC classification number: H01M10/4257 ,  H01M10/482 ,  H01M50/267 ,  H01M2010/4271 ,  H01M2010/4278 ,  H01M50/249 ,  H01M2220/20

Abstract: An example method includes receiving, at a module management unit (MMU) associated with a battery cell, a battery cell parameter measurement associated with the battery cell. The MMU in is communication with a battery radio frequency module via a first link. The method further includes performing, by the MMU, a first function based at least in part on the battery cell parameter measurement to generate a first signal, and transmitting, from the MMU, the first signal to the battery radio frequency module via the first link. The method further includes performing, by the battery radio frequency module, a second function based at least in part on the first signal to generate a second signal. The method further includes transmitting, from the battery radio frequency module, the second signal to a controller, and performing, by the controller, a third function based at least in part on the second signal.