公开(公告)号：US20220037892A1

公开(公告)日：2022-02-03

申请号：US16945558

申请日：2020-07-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sara R. Beyer ,  Fang Wang ,  Tao Wang ,  Jeffrey Michael Setting

IPC: H02J7/00

Abstract: A battery system with battery cell groups arranged in battery modules includes a controller network configured to monitor each module. The network includes multiple cell monitoring units (CMUs); each CMU electrically connected to one battery module and configured to process cell data for the respective battery cell groups. The network also includes multiple voltage sensors on each CMU—each sensor configured to detect voltage across one respective cell group, and multiple microchips—each microchip arranged on one CMU in communication with the respective voltage sensors. Each microchip is programmed with an algorithm configured to receive detected voltage data from the respective sensors at predetermined time intervals over a predetermined timeframe and store the voltage data. The algorithm is additionally configured to determine a discharge rate of each associated cell group using the stored data and determine degradation of each cell group using the determined respective discharge rate.