公开(公告)号：US11762028B2

公开(公告)日：2023-09-19

申请号：US17669486

申请日：2022-02-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Chaitanya Sankavaram ,  Garrett Michael Seeman ,  Zining Zhang ,  Calvin Wang

IPC: G01R31/389 ,  G01R31/396 ,  B60L58/12 ,  G01R31/374 ,  G01R31/3842

CPC classification number: G01R31/389 ,  B60L58/12 ,  G01R31/374 ,  G01R31/3842 ,  G01R31/396

Abstract: A current measuring circuit measures a charging current of a battery comprising a plurality of cell groups while the battery is being charged using one of a plurality of charging systems. A voltage measuring circuit measures voltages of the cell groups. A controller defines a plurality operating regions in a charging current profile of the battery during a charging cycle, filters the charging current and the voltages measured in the operating regions, calculates internal resistances of the cell groups in the operating regions based on the filtered current and voltages, generates at least one of statistical values and distance metrics based on the internal resistances of the cell groups, and determines whether one or more of the cell groups is faulty based on the at least one of the statistical values and the distance metrics irrespective of the plurality of charging systems used to charge the battery.

公开(公告)号：US11084541B2

公开(公告)日：2021-08-10

申请号：US16566683

申请日：2019-09-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Wonhee M. Kim ,  Paul W. Alexander ,  Jonathan E. Luntz ,  Diann Brei ,  Noah Luntzlara ,  Yun Ju Kim ,  Zining Zhang ,  Laura Alejandra Giner Munoz ,  Koray Benli

IPC: B62D35/00 ,  F16H1/28

Abstract: An inflatable structure includes a top end cap, a bottom end cap, a bladder, a plurality of tethers, and an adjustment mechanism. The bladder is attached to the top and bottom end caps and configured to hold pressurized air therebetween. The plurality of tethers are disposed within the bladder. Each tether in the plurality of tethers has a first end coupled to the top end cap and a second end coupled to the bottom end cap. When the bladder is inflated, the plurality of tethers restrict a number of degrees of freedom of the inflatable structure and a type of the degrees of freedom. The adjustment mechanism is operable to move the second end of at least one tether in the plurality of tethers to adjust at least one of the number of the degrees of freedom and the type of the degrees of freedom.