Gm Global Technolgoy Operations, Inc.

Thanh-Son Dao

Charles W Wampler, Ii

James R Salvador

Debejyo Chakraborty

Thomas A Yersak

Raffaello Ardanese

Ryan Curtis Sekol

Dmitriy Bruder

Sean R Wagner

Charles Weldon Wampler, Ii

Ronald Michael Lesperance

A system for an electric vehicle includes a hysteresis module configured to calculate a plurality of hysteresis state components of a battery based on a measured current and a respective hysteresis transit rate, calculate an overall hysteresis state of the battery based on the plurality of hysteresis state components, and calculate a hysteresis voltage of the battery based on the overall hysteresis state, and a state of charge (SOC) module configured to calculate an SOC of the battery based in part on the hysteresis voltage.

Battery state estimation based on multiple rates of hysteresis transit

A method for identifying a cell quality during cell formation includes: conducting a beginning of life cycling following an initial cell formation charge of multiple cells; collecting and preprocessing a discharge data set generated by one of the multiple cells during the beginning of life cycling; calculating a statistical variance from the discharge data set identifying an estimated probability of meeting a target cell usage time; and projecting a life span of the multiple cells.

Electrochemical methods for identification of cell quality

A method of analyzing the quality of a battery cell includes performing a high-throughput quality check on the battery cell with a quality control system, assessing a quality score to the battery cell, with quality score identifying the battery cell as low-quality or high-quality, and performing a comprehensive quality check on the battery cell if identified as low-quality. The method further includes assessing an enhanced quality score to the battery cell superseding the quality score of the quality control system identifying the battery cell as confirmed low-quality or confirmed high-quality and providing revised production instructions for manufacturing successive battery cells if confirmed low-quality.

Method of analyzing the quality of a battery cell by performing a comprehensive quality check on battery cells assessed as low-quality from a high-throughput quality check

Growing community of inventors

Rochester Hills, MI, United States of America

Thanh-Son Dao